WATER RESOURCESTHESAURUS

U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

WATER RESOURCES SCIENTIFIC INFORMATION CENTER

Reprint

OWRT IT-80/1

WATER RESOURCESTHESAURUS

THIRD EDITION

A VOCABULARY FOR INDEXING AND RETRIEVING THE LITERATURE OF WATER RESOURCESRESEARCH AND DEVELOPMENT

1980

U.S. DEPARTMENT OF THE INTERIOROFFICE OF WATER RESEARCH AND TECHNOLOGY

WASHINGTON, D.C. 20240

CONTENTS

Preface iii Introduction v

Using the Thesaurus vI. Thesaurus of Descriptors v

A. Use vi B. Used For (UF) vi C. Broader Term (BT) vi D. Narrower Term (NT) vi E. Related Terms (RT) vii

n. Descriptor Words vii IE. Descriptors vii

Acknowledgment viii Thesaurus of Descriptors 1

Descriptor Words DW-1 Descriptors D-l

PREFACE

This Thesaurus, developed under a contract with the Smithsonian Science Information Exchange, is one of several publications of the Office of Water Research and Technology, U.S. Department of the Interior, intended to fulfill the responsibilities of the Secretary of the Interior under P. L. 95-467, The Water Research and Development Act of 1978. The authorization for developing and distributing a vocabulary for indexing and retrieving the literature of water resources research and development stems from Title HI, Section 301, wherein the Secretary of the Interior is directed to maintain a national center for the acquisition, processing and dissemination of information dealing with all areas of water resources research, technology development and demonstration.

A word list containing cross-references and relationships among the scientific and technical terms used by researchers and others is an essential tool for ready access to knowledge. It provides access to relevant research by means of storage, dissemination, and retrieval of information on water resources problems.

The availability of this Thesaurus will make it possible to enlist individual researchers and other authors of water resources literature to contribute to the documentation of their work by providing indexing terms from this volume. Indexing at the source and improving the information content of titles, descriptions of research projects, and abstracts of reports and general literature are part of a concerted effort now underway by scientific and engineering societies, universities, and Government to improve communications and facilitate retrieval of scientific and technical information.

Users of this third edition of the Water Resources Thesaurus are invited to send their comments and suggestions for its improvement to the Technology and Information Transfer Program, Office of Water Research and Technology, U.S. Department of the Interior, Washington, D.C. 20240. The comments, together with the statistics of actual use of the terms in indexing and retrieval, will provide the basis for future revisions.

GARY D. COBB, DirectorOffice of Water Research and Technology

in

INTRODUCTION

This Water Resources Thesaurus encompasses such broad research areas as the hydrologic cycle, supply of and demand for water, conservation and best use of available supplies of water, methods of increasing supplies, and the economic, legal, social, engineering, recreational, biological, geographical, ecological, and qualitative aspects of water resources.

This volume represents a major revision of the previous edition of the Thesaurus, published in 1971. The principal source of terms for this edition has been the indexing used in Selected Water Resources Abstracts (SWRA). Since its inception in 1968, SWRA has indexed tens of thousands of publications. Its indexing terminology has been developed by expert abstracters and researchers, and represents the range of disciplines related to research, development, and management of water resources.

The SWRA vocabulary consisted of 105,000 terms; 103,000 terms had been referenced less than 100 times and of these, 96,500 had been referenced less than 10 times each. Frequently referenced terms included 2000 which were used 100 or more times, 94 which were used 2000 or more times, and 3 terms which were used 8000 or more times. Some terms with a high frequency of use have been excluded from this Thesaurus because they were too broad or too ambiguous to be of value in indexing or retrieval. Other terms with very low use were nevertheless specific to water-related topics and merited inclusion.

Changes in computer storage and retrieval capability also have influenced the choice of terms. With text searching now practical and economical there seemed little purpose for including long lists of specific but familiar names.

Consequently, names of specific legislative acts, rivers, oceans, bays, birds and most chemical terms are excluded from this Thesaurus. Emphasis is placed instead on terms useful for classifying or grouping specifics because such terms might not appear in the text of an abstract and yet, given modern retrieval techniques, are important for selecting subsets of the file for more detailed text searching. In many cases a scientific name will be referred to a common name in order to alert the reader to both. Online users should note that certain words may appear in a combined or hyphenated form (e.g. seawater, wastewater, waste- assimilative capacity, confined-water wells).

USING THE THESAURUS

The Thesaurus consists of three sections: Thesaurus of Descriptors. Descriptor Words, and Descriptor List.

I. THESAURUS OF DESCRIPTORS

This is the main indexing and retrieval tool containing an alphabetical list of approved terms which are interfiled with USE references that lead the user to the right descriptors. Five types of cross-references are used in the line following a main term. These and their abbreviations are:

1. USE2. Used For (UF)3. Broader Term (BT)4. Narrower Term (NT)5. Related Term (RT)

A. USEThe USE reference informs the reader that the term under which it is placed is not generally used for indexing and should be substituted by the term immediately following the USE. For example:

Bulk Density On-site LaboratoriesUSE Density USE On-site Investigations

B. USED FOR (UF)The Used For (UF) reference is the reciprocal of the USE and identifies terms it encompasses. For example:

Intermittent Streams UF Seasonal Streams

Temporary Streams

Oil UF Crude Oil

C. BROADER TERM (BT)The Broader Term (BT) reference under a given descriptor is employed to indicate one or more descriptors which represent more inclusive class concepts. For example:

Mangrove Swamps BT Swamps

Reservoir Fisheries BT Fisheries

ChlorellaBT Chlorophyta

D. NARROWER TERM (NT)1. A Narrower Term reference is the reciprocal of the Broader Term (BT) and represents:

(a) an immediate hierarchical subset of the Broader Term (BT) or(b) a semantic subset of the Broader Term (BT)

For example: for (a) Amphibians

NT FrogsSalamanders Toads

Mammals NT Rodents

Ruminants

for (b)Basins

NT Groundwater Basin Lake Basins River Basins

for (a) and (b)Bacteria

NT Azotobacter Beggiatoa Pseudomonas Sewage Bacteria

Fish NT Anadromous Fish

BassMenhaden

ErosionNT Bank Erosion Beach Erosion Channel Erosion

FloodsNT Annual Floods Design Floods

Flash Floods Historic Floods

Pesticides NT Acaricides Organic Pesticides

2. Terms which themselves have further subsets and are listed alphabetically as main terms with their own NT subsets are denoted by a preceding dash. (Hierarchies are not embedded under a single Broader Term.) For example:

Aquatic LifeNT Aquatic Animals

Aquatic Plants

Aquatic AnimalsNT Aquatic Insects

Crustaceans Fish

CrustaceansNT Amphipods

Copepods Crabs

VI

3. If the number of Narrower Terms under a BT is very large, or if the terms are only marginally related to water resources, a note "See Also Names of Specifics" may appear, denoting that possible entries have been alphabetized as main terms rather than listed as NTs. For example:

Construction Materials (See Also Names of Specific Materials)

e.g. Concretes, Lumber, Tiles etc. are listed as main terms.

If specifics are not listed under a main term and no note refers to those specifics, one should assume none are included in the Thesaurus. For example, NT does not include names of specific rivers:

RiversNT Interstate Rivers

Navigable Rivers Wild Rivers

E. RELATED TERMS (RT)1. The (RT) reference is employed as a guide from a given term to terms that are closely related

in ways other than the genus-species (BT-NT) relationship. In general, any two terms bear the cross-reference RT to each other if it is believed that the user, when examining one of them, might want to be reminded of the existence of the other. Related Term references may be used to identify relationships such as the following:

(a) Terms that are near-synonyms such as:

Streams RT Rivers

(b) Terms that have viewpoint interrelationships, such as a relationship based on usage:

Surface Tension RT Capillarity

(c) Terms representing concepts bearing a whole-part relationship to each other such as:

ParasitismRT Pathology

(d) Terms that represent overlapping concepts such as:

2. Related Terms which are alphabetically adjacent to one another have not been listed in an RT relationship to avoid redundancy.

II. DESCRIPTOR WORDSThe second section, Descriptor Words, is an alphabetical listing of each significant word making up a term in the Thesaurus. All descriptors and USE references appear in this listing. This section also gives the user the proper word order in a multi-word term, thus locating the descriptor no matter which word is used.

III. DESCRIPTORSThis section contains all approved terms. It provides a quick reference for checking and verification ofword terms and their spelling.

VII

Special recognition is acknowledged for substantive and lexicographic contribution by Ljubo Lulich, Office of Water Research and Technology, U.S. Department of the Interior, and James R. Wheatley, Chief of the Biological Sciences Branch, Smithsonian Science Information Exchange, Washington, D.C.

VIII

THESAURUS OF DESCRIPTORS

AbaloneBT Moliusks

Abandoned WellsBT Wells

AbatementUSE Water Pollution Control

AbiesUSE Fir Trees

AblationRT Glaciers

Snow Cover

AbrasionR T Accumulation

Erosion Roughness Coefficient

Scour Sedimentation

Weathering

Abrupt WavesBT Waves

Absolute ViscosityUSE Viscosity Coefficient

Absorbed WaterUSE Hygroscopic Water

Absorbing WellsUSE Drainage Wells

AbsorptionUF UptakeR T Accumulation

Absorption LossRT Water Loss

AbstractsRT Documentation

AbutmentsRT Bridges

Piers Piles Retaining Walls

Abyssinian WellsBT Wells

AcaricidesBT Pesticides

Accelerated ErosionBT Erosion

Accelerated FlowBT Flow

Access RoutesBT Roads RT Public Access

Right-of-way

AccidentsRT Hazards

Safety Acclimation

USE Acclimatization Acclimatization

UF Acclimation RT Adaptation

AccountingRT Costs

AccretionNT Channel Accretion RT Aggradation

Legal AspectsAccumulation

UF UptakeNT Bioaccumulation

Snow Accumulation RT Abrasion

Absorption Erosion

AcerUSE Maple Trees

Acetic Acid Acetylene ReductionAchnanthes

USE Diatoms

AchromobacterBT Bacteria

Acid Mine DrainageUF Acid Mine Water

Mine Acids BT Mine Drainage RT Acid Streams

Acid Mine WaterUSE Acid Mine Drainage

Acid RainBT Rainfall RT Air Pollution

Fallout

Acid StreamsBT StreamsRT Acid Mine Drainage

Acidic SoilsBT Soil Types

Acidic WaterBT Water

AcidityBT Chemical Properties

Acids(See Also Names of Acids)

NT Inorganic Acids Organic Acids Volatile Acids

AcousticsBT Physical Properties

ActinomycesBT Bacteria

Activated CarbonBT Carbon RT Adsorbents

Activated SludgeBT Sludge

Activated Sludge ProcessUF Contact Stabilization Process BT Wastewater Treatment

AdaptationRT Acclimatization

Evolution

AdditivesNT Concrete Additives

Adenosine Triphosphate Adhesive Water

USE Pellicular Water

AdhesivesBT Binders

BT (broader term): NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

Adjudication Procedure (Cont.) WATER RESOURCES THESAURUS

Adjudication ProcedureRT Legal Aspects

AdministrationRT Operating Policies

Public PolicyAdministrative Agencies

RT OrganizationsAdministrative Decisions

AT Decision MakingPolicy Making

RT Judicial DecisionsAdministrative Regulations

BT RegulationsAdolescent Rivers

BT RiversAdsorbents

RT Activated Carbon Adsorption

UF Uptake Advanced Wastewater Treatment

BT Wastewater Treatment RT Complete Wastewater Treatment

Primary Wastewater Treatment Secondary Wastewater Treatment Tertiary Wastewater Treatment

Advection Adverse Possession

RT Legal AspectsAedes

USE MosquitoesAeolian Deposits

UF Wind Deposits

Aeolian SoilsRT Soil Genesis

Aerated LagoonsUF Aerated PondsBT LagoonsRT Anaerobic Lagoons

Aerated Ponds USE Aerated Lagoons

AerationUF Extended Aeration NT Instream Aeration

Soil Aeration RT Oxidation

Wastewater TreatmentAeration Zone

UF Unsaturated Zone BT Zones

AeratorsAerial Photography

BT Photography RT Infrared Imagery

Remote Sensing

AerobacterBT Bacteria

Aerobic BacteriaBT Bacteria

Aerobic ConditionsRT Anaerobic Conditions

Dissolved OxygenAerobic Digestion

BT DigestionAerobic Treatment

BT Biological TreatmentAerogenes

BT BacteriaAeromonas

BT Bacteria Aerosols

RT Air Pollution Fallout Foaming

AestheticsRT Highway Beautification

Landscaping Scenery

AestivationUSE Animal Physiology

AfforestationUSE Reforestation

AfterbaysBT Tailrace

AgarsRT Culture Media

AggradationRT Accretion

SedimentationAggrading Rivers

BT Rivers Aggregates

NT Lightweight Aggregates Soil Aggregates

AgingAgricultural Chemicals(See Also Names of Agricultural Chemi­

cals)RT Defoliants

Fertilizers Pesticides

Agricultural EngineeringBT Engineering

Agricultural HydrologyBT Hydrology

Agricultural RunoffBT RunoffNT Feedlot Runoff

Agricultural WastesUSE Farm Wastes

Agricultural WatershedsBT Watersheds

Agriculture(See Aiso Names of Crops)

RT AgronomyCrop Production Cultivated Lands Cultivation

Farming Farms

HorticultureAgroclimatology

USE ClimatologyAgronomic Crops Agronomy

RT AgricultureCrop Production

Air Circulation Air Conditioning

RT Cooling Air Entrainment Air Masses Air Pollution

UF Atmospheric PollutionHazeSmogSmoke

RT Acid RainAerosols

Air Pollution EffectsUF Pollution Effects

Air TemperatureBT Temperature

Air-earth InterfacesUF Earth-air Interfaces BT Interfaces

Air-water InterfacesUF Water-air Interfaces BT Interfaces

AircraftR T Transportation

Airports Albedo

RT RadiationAlcaligenes

BT BacteriaAlcoholsAldrinAlewife

BT FishAlfalfa

UF Medicago

Algae(See Also Names of Algae)

UF Seaweeds NT Chlorophyta

Chrysophyta Cyanophyta Euglenophyta

Marine Algae Nuisance Algae Odor-producing Algae

Phaeophyta Pyrrophyta

Rhodophyta Soil Algae Taste-producing Algae

BT (broader term); NT (narrower term); RT (related term), UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Animal Populations

Algae Harvesting Algal Blooms

USE EutrophicationAlgal Control

/IT Weed Control Algal Growth

RT EutrophicationAlgal Toxins

BT Toxins Algicides

BT Pesticides Algorithms

RT Mathematical StudiesAliphatic Hydrocarbons

BT HydrocarbonsAlkali Flats

RT PlayasAlkali Metals

BT Metals Alkaline Earth Metals

BT Metals Alkaline Soils

BT Soil Types Alkaline Water

BT WaterAlkalinity

BT Chemical Properties

Alkalis USE Bases

Alkylbenzene Sulfonates Alligatorweed

UF AltematheraAllocation of Resources

USE Resource AllocationAllotments

RT Economic Aspects Alloys

RT Castings Steel

Alluvial AquifersBT Aquifers

Alluvial ChannelsBT Channels

Alluvial DepositsBT SedimentsRT Fluvial Sediments

Alluvial FansRT Alluvial Plains

Debris Cone Sedimentary Structures

Alluvial PlainsUF Detrital Fans RT Alluvial Fans

Debris Cone Sedimentary Structures

Alluvial RiversBT Rivers

Alluvial SoilsRT Soil Genesis

AlluviumBT Sediments RT Clays

SandSilt

AlosaUSE Herring

Alpine RegionsRT Cold Regions

Mountains Orography

Alteration of FlowRT Flow

AltematheraUSE Alligatorweed

Alternative PlanningBT Planning

Alternative Water UseBT Water Use

AltitudeRT Elevation

Alum Alum Sludge

BT Sludge

Aluminum Aluminum Sulfate Amino Acids Aminotriazole Ammonia Ammonification AmmoniumAmmonium Compounds Ammonium Salts Amortization

RT Economic AspectsAmphibians

NT FrogsSalamanders Toads

Amphibious PlantsBT Aquatic Plants

AmphidiniumBT Dinoflagellates

AmphipodsBT Crustaceans NT Gammarus

Amphora USE Diatoms

AnabaenaBT Cyanophyta

AnacystisBT Cyanophyta

Anadromous FishBT Fish

Anaerobic BacteriaBT Bacteria

Anaerobic ConditionsRT Aerobic Conditions

Dissolved Oxygen Fermentation

Anaerobic DigestionUF Anaerobic Treatment BT Btodegradation

Biological TreatmentDigestion

Anaerobic LagoonsBT LagoonsRT Aerated Lagoons

Anaerobic Treatment USE Anaerobic Digestion

Analog ComputersBT Computers

Analog ModelsBT Model Studies

Analog/Digital ConvertersRT Computer Programs

Analysis of VarianceRT Mathematical Studies

Anastatic WaterUSE Fringe Water

Anchor IceUF Bottom IceBT Ice

Anchors Anemometers

RT Wind Anguilla

USE EelAnhydrite

USE Calcium Compounds Animal Behavior

BT Behavior Animal Diseases

BT Diseases NT Fish Diseases RT Fish Parasites

Animal Growth Animal MetabolismRT Animal Physiology

Feeding RatesAnimal Parasites

NT Fish Parasites Animal Pathology

BT Pathology Animal Physiology

UF Aestivation NT Fish Physiology RT Animal Metabolism

Animal PopulationsBT Populations

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

Animal Tissues (Cont.)

Animal Tissues Animal Wastes

BT Wastes RT Barn Wastes

Dairy Industry Farm Wastes

Feedlot RunoffFeedlot WastesSlotted Floors

Anion ExchangeBT Ion Exchange

AnionsBT Ions

Anisotropy Ankistrodesmus

BT Chlorophyta Annelids

NT Oligochaetes Polychaetes

RT Aquatic AnimalsAnnual Distribution

BT DistributionAnnual Floods

BT Floods

Annual RunoffBT Runoff

AnodesBT Electrodes

Anomorphic ZoneBT Zones

Anopheles USE Mosquitoes

AntarcticBT Polar Regions

Antecedent MoistureRT Antecedent Precipitation Index

Soil Water .Antecedent Precipitation Index

RT Antecedent MoistureAntecedent Streams

BT Streams

AntibioticsBT Pesticides

AnticyclonesRT Cyclones

AntimonyBT Heavy Metals

Antitranspirants Aphanizomenon

BT Cyanophyta.

Aphotic ZoneRT Deep Water

Euphotic Zone

Apparent Water Table USE Perched Water Table

ApplesApplication Rates Appraisals

RT Economic AspectsAppreciation

RT Economic Aspects -Appropriation

RT Legal AspectsApproximation Method

RT Mathematical StudiesAquaculture

UF AquicultureMariculture .

:V7" Fish FarmingShellfish Farming

RT Commercial FishingAquariums Aquatic Animals(See Also Names of Aquatic Animals)

UF Aquatic Fauna BT Aquatic Life AT Aquatic Insects

Benthic Fauna Coelenterates Crustaceans

Echinoderms Fish

Marine Animals Mollusks Protozoa

Rotifers SealsTubificids Turtles Whales

RT Annelids Nematodes Platyhelminthes

RodentsAquatic Bacteria

BT BacteriaAquatic Drift

RT Driftwood Floating Flotsam Jetsam Littoral Drift

PlanktonSeston

. Tripton

Aquatic EcosystemsUSE Ecosystems

Aquatic EnvironmentBT Environment

Aquatic Fauna USE Aquatic Animals

Aquatic FungiBT Fungi

Aquatic HabitatsBT HabitatsR T Environment

Aquatic InsectsBT Aquatic Animals

Insects AT Caddisflies

DobsonfliesDragonfliesMayfliesMosquitoesStonefliesWater Beetles

Aquatic LifeWT Aquatic Animals

Aquatic Plants Benthos

Fish Food Organisms Plankton

Stream BiotaAquatic Plants(See Also Names of Aquatic Plants)

UF CeratophyllumLemnaNitella

BT Aquatic Life »Vr Amphibious Plants

Aquatic WeedsBenthic FloraFloating PlantsMarine AlgaeMarine PlantsMarsh PlantsPhytoplanktonRooted Aquatic PlantsSea GrassesSubmerged Plants

Aquatic PopulationsBT Populations

Aquatic ProductivityBT ProductivityR T Biomass

Eutrophication Primary Productivity Secondary Productivity

Aquatic SoilsUF Lake Soils BT Mud RT Ooze

Sediments Soil Types

Aquatic Weed ControlBT Weed Control

Aquatic WeedsBT Aquatic Plants

WeedsAqueductsRT Conduits

Conveyance StructuresCulvertsFloodways

Flumes Pipes Siphons Tubes

Water Conveyance Water Transport

BT (broader term); NT (narrower term); RT (related term); UF (used for): (terms which have further subsets)

THESAURUS OF DESCRIPTORS Available Water

AquicludesBT Geologic FormationsRT Aquitards

Confining Beds Groundwater Barriers

Springs Wells

Aquiculture USE Aquaculture

Aquifer CharacteristicsUF Aquifer Evaluation

Aquifer Evaluation USE Aquifer Characteristics

Aquifer Management Aquifer Systems Aquifer Testing Aquifers

UF Carbonate Aquifers Saline Aquifers Unconfined Aquifers Water-bearing Formations

AT Alluvial Aquifers Coastal Aquifers Confined Aquifers Glacial Aquifers Leaky Aquifers Perched Aquifers Sand Aquifers Unconsolidated Aquifers

RT Groundwater BasinsGroundwater Reservoirs Groundwater Storage

AquitardsBT Geologic Formations R T Aquicludes

Arch DamsBT Dams

Archaeology Architecture

NT Naval Architecture Arctic

BT Polar RegionsArctic Zone

BT Climatic ZonesArea Redevelopment

RT PlanningArea- Altitude Analysis

USE Hypsometric AnalysisAreal Hydrogeology

BT HydrologyAreal Precipitation

BT Precipitation Argon Arid Climates

BT Climates Arid Lands

RT DesertsSemiarid Lands

Arid ZoneBT Zones

Arid-zone HydrologyBT Hydrology

AroclorsBT Polychlorinated Biphenyls

Aromatic CompoundsAromatic Hydrocarbons

USE Hydrocarbons Arroyos

RT Gullies Wadi

ArsenicArsenic CompoundsArsenic Radioisotopes

BT Radioisotopes Arsenicals Artesian Aquifers

USE Confined Aquifers Artesian Basins

BT BasinsRT Groundwater Basins

Artesian CapacityBT Capacity

Artesian FlowBT Flow

Artesian Head Artesian Pressure

RT Hydrostatic Pressure Artesian Springs

BT SpringsArtesian Wastes

BT Wastes Artesian Water

USE Confined GroundwaterArtesian Wells

BT WellsArthrobacter

BT BacteriaArtificial Lakes

BT Lakes Artificial Precipitation

BT PrecipitationWeather Modification

RT Cloud SeedingSimulated Rainfall

Artificial RechargeBT RechargeRT Groundwater Recharge

Groundwater Storage Induced Infiltration

Artificial SludgeBT Sludge

Artificial StormsBT Storms

Weather ModificationArtificial Watercourses

BT Watercourses

Asbestos Asbestos Cement

BT CementsAsphalt Asphaltic Concrete

BT Concretes Assay

NT BioassayAssessments

RT Legal Aspects Assimilative Capacity

BT CapacityAsterionella

BT Diatoms Atlases

USE Maps Atmometers

USE EvaporimetersAtmosphere Atmospheric PhysicsAtmospheric Pollution

USE Air PollutionAtmospheric Precipitation

USE Precipitation

Atmospheric PressureAtmospheric Water

BT WaterAtolls

RT Reefs Atomic Absorption

USE Spectral Analysis

Atomic Absorption Spectrophotometry

BT Photometry Atomic Absorption Spectroscopy

BT SpectroscopyAttached Groundwater

BT Groundwater RT Pellicular Water

Atterberg Limits Attitudes

RT BehaviorPublic Opinion Public Participation

Attractants Autoanalyzers Autoclaves Automation(Includes Automatic Control)

RT ComputersData Processing

Available HeadAvailable Moisture

USE Available Water

Available WaterUF Available Moisture

BT (broader term); NT (narrower term); RT (related term): UF (used for); (terms which have further subsets)

Available Water (Cont.) WATER RESOURCES THESAURUS

Water Availability BT WaterNT Maximum Available Water RT Groundwater Availability

Moisture AvailabilitySoil WaterSurface Water Availability

AvalanchesUF Snow Avalanches RT Erosion

LandslidesMass Wasting

Average FlowBT Flow

Average VelocityBT Velocity

Avulsion RT Erosion

Axenic CultureUSE Culturing Techniques

AzotobacterBT Bacteria

BBacillariophyceae

USE Diatoms

BacillusBT Bacteria

BackblowingRT Flow

BackfillBT Earthworks

Background LevelsUSE Baseline Studies

Background RadiationBT Radiation

Backwash Backwater Backwater Curve

RT Flow Profiles

Backwater EffectBacteria

.VT Achromobacter Aetinomyces Aerobacter Aerobic Bacteria Aerogenes Aeromonas Alcaligenes Anaerobic Bacteria Aquatic Bacteria Arthrobacter Azotobacter Bacillus Beggiatoa Citrobacter Clostridium Coliforms

CorynebacteriumEnteric BacteriaEnterobacterEscherichia ColiFerrobacillusFlavobacteriumHeterotrophic BacteriaIron BacteriaKlebsiellaLactobacillusMarine BacteriaMethane BacteriaMycobacteriumMyxobacteriaNitrogen Fixing BacteriaPathogenic BacteriaPhotosynthetic BacteriaProteusPseudomonasSalmonellaSaprophytic BacteriaSerratiaSewage BacteriaShigellaSoil BacteriaSphaerotilusStaphylococcusStreptococcusSulfur BacteriaThermophilic BacteriaThiobacillusVibrioZoogloea

Bacterial AnalysisBT Water Analysis

Bacterial Physiology Bactericides

BT Pesticides

BacteriophageBT Viruses

BafflesBaitsBalance of NatureBalancing Reservoirs

BT ReservoirsRT Equalizing Reservoirs

BalanusUSE Barnacles

BallastRT Bilge

Bank ErosionBT Erosion

Bank ProtectionBT Protection

Bank StabilizationRT Stream Stabilization

Bank StorageBT Storage

Bankfull StageBT Stages

Water Level

BanksUF Canal Embankments NT Spoil Banks

Stream BanksBarges

RT Boats Barium

BT Heavy MetalsBarley Barn Wastes

RT Animal Wastes

Barn WastewaterBT Farm Wastes

Wastewater NT Feedlot Wastes

BarnaclesUF Balanus BT Crustaceans

Barometric Efficiency Barrier Islands

UF Outer Banks Barrier Springs

BT SpringsRT Contact Springs

BarriersNT Fish Barriers

Groundwater Barriers Saline Water Barriers

RT Cutoffs Dams

Weirs

BasaltsBT Crystalline Rocks

Base FlowBT Flow

Groundwater Movement RT Groundwater Runoff

Base RunoffBT Runoff

Baseline StudiesUF Background Levels

Environmental Surveys

Bases(See Also Names of Bases)

UF Alkalis

Basin IrrigationBT Irrigation

BasinsNT Artesian Basins

Catchment Basins Closed Basins Continental Basins Debris Basins Desilting Basins Equalizing Basins Experimental Basins Flood Basins

Groundwater Basins Influence Basins Lake Basins Listing Basins

BT (broader lerm); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Biological Wastewater Treatment

Recharge Basins Representative Basins Retarding Basins River Basins Sedimentary Basins Sedimentation Basins Settling Basins Stilling Basins Tidal Basins Vigil Basins

RT Drainage Area Watersheds

BassUF Largemouth Bass

Micropterus BT Fish

Batch CultureUSE Culturing Techniques

BathylimnionRT Hypolimnion

BathymetryBathythermographsBayous

BT Wetlands RT Streams

BaysRT Bights

Gulfs Sounds

Beach ErosionBT Erosion

Beach ProfilesBT Profiles

BeachesRT Shores

BeansBearing Strength

USE Strength Beavers

BT RodentsBed Load

UF Bed Sediment Bottom Load Traction Load

RT Sediment Load Sedimentation

Bed Sediment USE Bed Load

Bed-load Discharge Bedrock

BT Geologic FormationsBeech Trees Beets

UF Sugar BeetsBeggiatoa

BT BacteriaBehavior

NT Animal Behavior Fish Behavior Insect Behavior

RT Attitudes Food Habits Motivation

Bench FlumesBT Flumes

Beneficial Use BeneficiationBenefit-cost Analysis

USE Cost-benefit AnalysisBenefits

UF Comparative Benefits Direct Benefits Estimated Benefits Flood Benefits Indirect Benefits Intangible Benefits Marginal Benefits Monetary Benefits Project Benefits Public Benefits Social Benefits Tangible Benefits

Benthic EnvironmentR T En vironment

Ocean BottomBenthic Fauna

BT Aquatic Animals Benthos Fauna

Benthic FloraBT Aquatic Plants

Benthos Flora

BenthosBT Aquatic Life NT Benthic Fauna

Benthic Flora RT Biomass

BentoniteBT Soil Types

Benzenes Berm Ditches

BT Ditches BermsBermudagrass Beryllium Bibliographies

RT Documentation Publications

Bicarbonates Bights

RT Bays Sounds

BilgeRT Ballast

BindersNT Adhesives

Epoxy ResinsBioaccumulation

BT Accumulation

RT Biological Magnification Bioassay

BT AssayBiochemical Characteristics

USE Biochemistry Biochemical Oxygen Demand

R T WastewaterBiochemical Tests Biochemistry

UF Biochemical CharacteristicsBiocides

BT Pesticides Bioconcentration

USE Biological Magnification

Biocontrol Biodegradation

BT DegradationAT Anaerobic Digestion

Microbial DegradationSludge Digestion

BiofiltersBT Filters

BiofiltrationBT Filtration

BiographiesRT Publications

BioindicatorsBT IndicatorsRT Pollutant Identification

Biological Communities USE Ecosystems

Biological FiltersBT Filters

Biological MagnificationUF Bioconcentration RT Bioaccumulation

Biological MembranesBT Membranes

Biological OceanographyUSE Marine Biology

Biological OxidationBT Oxidation

Biological Oxygen DemandUF BODBT Oxygen Demand

Biological PropertiesBT Water Properties

Biological Samples.RT Sampling

Biological TreatmentNT Aerobic Treatment

Anaerobic DigestionBiological Wastewater Treatment

BT Wastewater Treatment RT Sludge Seeding

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

Bioluminescence (Cont.) WATER RESOURCES THESAURUS

Bioluminescence Biomass

RT Aquatic Productivity Benthos

Primary ProductivityBiomphalaria

USE Snails Biorhythms

R T EcologyBiosynthesis

BT Synthesis RT Metabolism

Biotin Biotransformation

RT MetabolismBirch Trees Birds

UF Game Birds AT Water Birds

WaterfowlBismuthBivalves

USE MollusksBlack Liquors

USE Pulp WastesBleach Plants

USE Pulp and Paper IndustryBleaching Wastes

BT Industrial Wastes ; RT Pulp and Paper Industry

Textile Mill WastesBlizzards

BT Storms Blood Blooms

USE Eutrophication Blowing Snow

BT SnowRT Drifting Snow

BlowoutsBlue-green Algae

USE CyanophytaBluegills

UF Lepomis BT Fish

BluegrassesBoard Mills

USE Mills

Boat-launching RampsBT Recreation Facilities

BoatingRT Recreation

Boating RegulationsBT Regulations

BoatsRT Barges

Ships

Transportation BOD

USE Biological Oxygen DemandBogs

BT Wetlands NT Flow Bogs

MuskegPeat Bogs

RT Fens Marshes Swamps

Boiler WaterBT Water

Boiling Water ReactorsBT Nuclear Reactors RT Heat Exchangers

Bond IssuesRT Economic Aspects.

BondingUF Hydrogen Bonding R T Cohesion

Border IrrigationBT Irrigation

Border SpringsUSE Boundary Springs

Borehole GeophysicsBT Geophysics

Boreholes Boron Borrow PitsBosmina

USE CrustaceansBottom Currents

BT Water Currents RT Density Currents

Bottom IceUSE Anchor Ice

Bottom Load USE Bed Load

Bottom SamplingBT Sampling

Bottom SedimentsBT Sediments

Bottom WaterBT WaterR T Deep Water

BottomlandBT Flood Plains

Bound WaterBT Water

Boundaries.VT Geohydrologic Boundaries

Impervious Boundaries Leaky Boundaries Property Boundaries Water Boundary

Boundary Conditions Boundary Disputes

RT Legal AspectsBoundary Layers Boundary of SaturationRT Saturation

Boundary Processes Boundary Springs

UF Border Springs BT Springs

Bouyoucos Blocks Bowen Ratio Brackish Water

BT Water RT Seawater

Braided RiversUSE Braided Streams

Braided StreamsUF Braided Rivers BT Streams

Branch SewersBT Sewers

BreakwatersRT Jetties

Sea WallsBreeder Reactors

BT Nuclear ReactorsBridge Construction

BT ConstructionBridge Design Bridge Failure Bridges

RT Abutments Brine Disposal

BT Waste Disposal

BrinesUF Hot BrinesRT Desalination Wastes

Industrial Wastes Saline Water

Broad IrrigationBT Irrigation RT Land Disposal

Wastewater Disposal Wastewater Farming

BromegrassBromidesBromine

BT HalogensBrown Soils

BT Soil Types

Brush ControlR T Chaparral

Weed Control

Bubble GagesBT Gages

8 BT (broader term); NT (narrower lerm); RT (related term); UF (used for): (terms which'have further subsets!

THESAURUS OF DESCRIPTORS Carbon Radioisotopes

Bubbles Buckling

BT Mechanical Failure Budgeting

RT Economic AspectsBuffalo Fish

BT Fish Building Codes

RT Legal Aspects Building Materials

USE Construction MaterialsBuildingsBulk Density

USE DensityBulkhead Gates

BT GatesBulkhead Line Bulkheads Bulking Sludge

UF Sludge Bulking BT Sludge

BullheadBT Fish

BulrushesUF Scirpus

Bunker OilUSE Oil

Buoyancy Buoys

RT NavigationBuried Rivers

BT Rivers Burning

USE IncinerationButtress Dams

BT Dams

Bypass* ChannelsBT ChannelsRT Diversion Channels

ByproductsRT Degradation Products

Metabolites

C-14 USE Carbon Radioisotopes

Cable Tool DrillingBT Drilling

Cacti Caddisflies

UF Trichoptera BT Aquatic Insects

CadmiumBT Heavy Metals

Cadmium RadioisotopesBT Radioisotopes

Caenis USE Mayflies

CaissonsCalanus

USE CopepodsCalcareous Soils

BT Soil Types Calcite CalciumCalcium Carbonate Calcium Chloride Calcium Compounds

UF Anhydrite

Calcium Hydroxide Calcium Sulfate Calibrations Caliche

BT Soil TypesCallinectes

USE CrabsCalorimetry Cameras Camp Sites

BT Recreation Facilities

CampingRT Recreation

Canal ConstructionBT Construction

Canal DesignCanal Embankments

USE BanksCanal Linings

BT LiningsCanal Seepage

BT Seepage Canals

NT Drainage Canals Irrigation Canals Navigation Canals

RT Inland WaterwaysOpen Channels

WaterwaysCanneries

BT Industrial Plants Canopy

RT Throughfall Cantilevers Canyons

UF GorgesNT Submarine CanyonsRT Valleys

CapacityNT Artesian Capacity

Assimilative Capacity

Capillary Capacity Carrying Capacity Discharge Capacity Effective Capacity Field Capacity In-bank Capacity Infiltration Capacity Inverted Capacity Peaking Capacity Reservoir Capacity Retention Capacity Sediment-carrying Capacity Soil Absorption Capacity Specific Capacity Spillway Capacity Storage Capacity Thermal Capacity Waste-assimilative Capacity Water-carrying Capacity Well Capacity

CapillarityUF Capillary Action RT Flow

Percolation Surface Tension

Capillary ActionUSE Capillarity

Capillary CapacityBT Capacity

Capillary ConductivityBT ConductivityRT Groundw'ater Movement

Capillary TensionUSE Moisture Tension

Capillary WaterBT Water RT Porous Media

Soil WaterCapillary Waves

BT WavesRT Gravity Waves

Capillary ZoneBT Zones

CapitalRT Economic Aspects

Capital CostsBT Costs

CarassiusUSE Goldfish

Carbamate PesticidesBT Pesticides

Carbohydrates Carbon

NT Activated Carbon Organic Carbon

Carbon Cycle Carbon Dioxide Carbon Filters

BT Filters Carbon Radioisotopes

UF C-14

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

Carbon Radioisotopes (Cont.) WATER RESOURCES THESAURUS

Carbon-14 BT Radioisotopes

Carbon-14USE Carbon Radioisotopes

Carbonate AquifersUSE Aquifers

Carbonate RocksBT Rocks

Carbonates Carcinogens Carnivores Carotenoids Carp

UF Cyprinus BT Fish

CarpsuckerBT Fish

Carrots Carrying Capacity

BT Capacity

Carryover StorageBT Storage

Case Studies Casings

NT Well CasingsCastings

RT Alloys Metals

CatalystsRT Enzymes

Catchment AreasUF Collecting Areas

Drainage Basins NT River Basins

WatershedsCatchment Basins

BT BasinsCatfish

UF Ictalurus BT Fish

Catfish FanningBT Fish Fanning

Catfish PondsBT Ponds

CathodesBT Electrodes

Cation ExchangeBT Ion Exchange

CationsBT Ions

Catostomus USE Sucker

CattailsUF Typha

Cattle Causeway Cavern Flow

BT FlowCaves Cavitation

BT FlowRT Fluid Mechanics

Cellulose AcetateCellulose Acetate Membranes

BT MembranesCements

NT Asbestos CementPortland Cements

RT MortarPozzolans

Cenozoic EraBT Geologic Time

Centrifugation Ceratium

BT DinoflagellatesCeratophyllum

USE Aquatic PlantsCereal Crops Cerium Radioisotopes Cesium

BT Heavy MetalsCesium Radioisotopes

BT RadioisotopesCesspools

RT Wastewater DisposalChaetoceros

USE Diatoms Channel Accretion

BT AccretionChannel Detention Channel Erosion

BT ErosionRT Gully Erosion

Channel FlowBT Flow RT Critical Flow

Overland FlowChannel Improvement

RT NavigationStream Improvement Stream Stabilization

Channel Inflow Channel Loss Channel Morphology

BT MorphologyNT Roughness Coefficient

Channel ScourBT Scour

Channel SpringsBT Springs

Channel StorageBT Storage

ChannelingUF Channelization

Channelization USE Channeling

ChannelsNT Alluvial Channels

Bypass Channels CutoffsDiversion Channels Flood Channels Intercepting Channels Open Channels Outlet Channels Overflow Channels Regime Channels Stable Channels Terrace Channels Unstable Channels

RT Flumes Rills Sluices

WatercoursesChaparral

RT Brush Control Phreatophytes

CharaBT Chlorophyta

Charts Check Dams

BT DamsCheck Irrigation

BT Irrigation Check Structures

NT Retaining Walls RT Control Systems

Damsdelating Agents

UF Metal Chelatesdelation demcontrol

RT Pesticidesdemical Analysis

BT Water Analysis RT Reagents

Chemical CoagulationBT Coagulation RT Flocculation

demical Composition demical Degradation

BT Degradation demical Engineering

BT Engineeringdemical Industry

RT Industrial Plants Chemical InterferenceChemical Oxidation

USE Oxidation

10 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Climatic Zones

Chemical Oxygen DemandBT Oxygen Demand RT Wastewater

Chemical Potential Chemical Precipitation

RT Chemistry of Precipitation Clarification

Chemical PropertiesBT Water Properties NT Acidity

AlkalinityHardnessImmiscibilitySalinity

Chemical ReactionsRT Chemistry of Precipitation

ElectrochemistryChemical Recovery

RT Degradation Products Chemical Reduction Chemical Sludge

BT Sludge Chemical Stratification

BT StratificationChemical Structure

USE Molecular StructureChemical Treatment

/?7 Wastewater Treatment Water Treatment

Chemical WastesBT Industrial Wastes

Chemical WastewaterBT Wastewater

Chemistry of PrecipitationRT Chemical Precipitation

Chemical Reactions Nucleation

PrecipitationChemocline

RT MixolimnionChert Chestnut Soils

BT Soil TypesChezy Equation

RT Roughness CoefficientChinook

BT Wind Chironomids

USE Midges

ChlamydomonasBT Chlorophyta

ChlorellaBT Chlorophyta

ChloridesChlorinated Hydrocarbons

BT Hydrocarbons

ChlorinationBT Wastewater Treatment

Water TreatmentChlorine

BT HalogensNT Residual Chlorine

Chlorine RadioisotopesBT Radioisotopes

Chloroform Chlorophyll Chlorophyll A Chlorophyta

UF Green AlgaeBT AlgaeNT Ankistrodesmus

CharaChlamydomonasChlorellaCladophoraDesmidsDunalliellaScenedesmusSelenastrumSpirogyra

ChromatographyNT Electron Capture Gas

Chromatography Gas Chromatography Gas Liquid Chromatography Thin Layer Chromatography

ChromiumBT Heavy Metals

Chromium RadioisotopesBT Radioisotopes

ChrysophytaUF Dinobryon BT Algae NT Diatoms

OchromonasChubs

BT Fish Chutes

/?/ FlumesChydorus

USE WaterfieasCichlid

BT FishCiliates

USE ProtozoaCircuit Breakers

USE Electrical EquipmentCirques

RT Glaciation Cisco

UF Coregonus BT Fish

CisternsBT Water Tanks

Citizen ParticipationUSE Public Participation

CitrobacterBT Bacteria

Citrus Fruits Civil Defense Civil Engineering

BT EngineeringCivil Law

RT Legal Aspects Cladophora

BT Chlorophyta Claims

USE Legal AspectsCams

UF Mercenaria BT Mollusks

ClarificationRT Chemical Precipitation

Filtration Wastewater Treatment Water Treatment

Clarified WastewaterBT Wastewater

Clarifiers Classification

NT Lake Classification Land Classification Soil Classification Stream Classification

RT Systematics Taxonomy

Clay LoamBT Soil Types

Clay Minerals Gays

UF Expansive ClaysBT Soil TypesRT Alluvium

Cleaning Cleanup

RT DecontaminationCleanup Operations

RT Oil Recovery Oil Spills

Gear WellsBT Wells

Gear-cuttingBT Forest Management

LoggingClear-water Reservoirs

USE Filtered-water ReservoirsGimates

NT Arid Climates Humid Climates Marine Climates Semiarid Climates Subhumid Climates Wet Climates

Climatic Data Climatic Zones

AT Arctic Zone Subarctic Zone

BT (broader term); NT (narrower terml: RT (related term); UF (used for); (terms which have further subsets) 11

Climatic Zones (Cont.) WATER RESOURCES THESAURUS

Subtropic Zone Temperate Zone Tropic Zone

RT Cold Regions Zones

GimatologyUF Agroclimatology NT Microclimatology

PaleoclimatologyWeather

OinolimnionRT Hypolimnion

CloggingRT Permeability

Closed BasinsBT Basins RT Sinks

Cosed LakesBT Lakes

Closed Systems Closed-conduit Flow

BT FlowGostridium

BT BacteriaGoud Cover

RT Weather Goud Physics

RT Weather Goud Seeding

BT Weather Modification RT Artificial Precipitation

GoudburstsBT Storms RT Rainfall

RainstormsGouds

RT-Fog

ClovenClupea

USE HerringCoagulation

BT Wastewater TreatmentWater Treatment

NT Chemical Coagulation

CoalBT Fuel

Coal GasificationBT Gasification

Coal Mine WastesUSE Mine Wastes

Coal MinesRT Strip Mines

Coal MiningUF Mining

ShaftsCoalescence

RT CohesionCoastal Aquifers

BT Aquifers

Coastal EngineeringBT Engineering

Coastal Geomorphology USE Geomorphology

Coastal MarshesBT Marshes

Coastal Plains Coastal Streams

BT StreamsCoastal Waters

BT Water Coastal Zone ManagementRT Planning

Coaster GatesBT Gates

CoastsRT Estuaries

ShoresCoatings

RT LiningsCobalt

BT Heavy MetalsCobalt Radioisotopes

BT RadioisotopesCoefficient of Permeability

USE Permeability Coefficient Coefficient of Roughness

USE Roughness CoefficientCoelenterates

BT Aquatic Animals NT Corals

Jelly FishSea Nettles

CofferdamsBT Dams

CohesionRT Bonding

CoalescenceCohesionless Soils

RT Soil Types Cohesiye Soils

RT Soil Types

Cold RegionsRT Alpine Regions

Climatic Zones Polar Regions

Cold ResistanceRT Insulation

Cold SpringsBT Springs

Cold Weather ConstructionBT Construction

ColiformsBT Bacteria

CollapseBT Mechanical Failure

Collecting Areas USE Catchment Areas

CollegesUSE Education

ColloidsNT Emulsions RT Gels

ColluYial SoilsBT Soil Types

ColorBT Optical Properties

Color Removal ColorimetryCombination Wells

BT Wells Combined Sewer Overflows

BT OverflowRT Storm Wastewater

Storm-overflow SewersCombined Sewers

BT SewersCombined Treatment

BT Wastewater TreatmentCombined Wastewater

BT WastewaterCombined Water

BT Water Commercial Fishing

UF Commercial Shellfishing BT Fishing RT Aquaculture

Sport FishingTrawling

Commercial Shellfishing USE Commercial Fishing

Common LawRT Legal Aspects

CommunicationRT Negotiations

Community DevelopmentRT Regional Development

Resources Development Urban Planning

Compacted SoilsRT Soil Types

CompactionNT Soil Compaction RT Compressibility

Pressure Distribution Stress

Comparative BenefitsUSE Benefits

Comparative ProductivityUSE Productivity

Comparison Studies Compensating Reservoirs

BT Reservoirs

12 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Continental Basins

CompensationRT Economic Aspects

Competing UseBT Water Use

Complete Wastewater TreatmentBT Wastewater TreatmentRT Advanced Wastewater Treatment

Primary Wastewater Treatment Secondary Wastewater Treatment Tertiary Wastewater Treatment

Composite Unit HydrographsBT Unit Hydrographs

Composting Compound Hydrographs

BT Hydrographs Comprehensive Planning

BT PlanningCompressed Air Compressibility

RT CompactionCompressible Flow

BT FlowCompressive StrengthComputer Applications

USE ComputersComputer Models

BT Model Studies

Computer ProgramsRT Analog/Digital Converters

Fortran Nonlinear Programming

ComputersUF Computer Applications NT Analog Computers

Digital ComputersHybrid Computers

RT AutomationConcentration Time

UF Time of ConcentrationConcrete Additives

BT AdditivesConcrete Construction

BT ConstructionConcrete Dams

BT DamsConcrete MixesConcrete Pipes

USE PipesConcrete Plants

BT Industrial Plants Concrete Properties

USE Concrete TechnologyConcrete Technology

UF Concrete Properties Concrete Testing

RT Testing ProceduresConcretes

;Vr Asphaltic Concrete

GuniteMass Concrete Precast Concrete Prestressed Concrete Reinforced Concrete

CondemnationRT Legal Aspects

Condemnation ValueBT Value

Condensates Condensation

NT DewDewpoint

FrostCondensers Conductance

UF Electrical Conductance RT Impedance

ConductionRT Convection

ConductivityUF Electrical Conductivity NT Capillary Conductivity

Specific Conductivity Thermal Conductivity

ConduitsNT Pressure Conduits RT Aqueducts

CulvertsSluices

ConferencesNT Symposium

Confined AquifersUF Artesian Aquifers BT Aquifers

Confined GroundwaterUF Artesian Water BT Groundwater

Confined-water WellsBT Wells

Confinement Pens Confining Beds

RT AquicludesConfluent Streams

BT StreamsConglomerate Rocks

BT Rocks Coniferous Forests

BT ForestsRT Deciduous Forests

Conifers(See Also Names of Trees)

BT TreesConjunctive Use

BT Water Use RT Recharge

Connate WaterUF Fossil Water

Native Water

BT WaterRT Interstitial Water

Consequent StreamsBT Streams

ConservationNT Fish Conservation

Soil Conservation Water Conservation Wildlife Conservation

Conservation StorageBT Storage

Consolidation SedimentationBT Sedimentation

Constitutional LawRT Legal Aspects

ConstraintsUSE Institutional Constraints

ConstructionNT Bridge Construction

Canal Construction Cold Weather Construction Concrete Construction Dam Construction Foreign Construction Reservoir Construction Road Construction Tunnel Construction

RT Erection Fabrication

Construction Costs BT Costs

Construction EquipmentConstruction Joints

UF Joints

Construction Materials(See Also Names of Materials)

UF Building MaterialsConstruction Methods Consumptive Use

BT Water Use RT Evapotranspiration

PhreatophytesContact Beds

BT Wastewater Treatment Contact Filters

BT FiltersContact Springs

BT SpringsRT Barrier Springs

Contact StabilizationContact Stabilization Process

USE Activated Sludge ProcessContaminants

USE PollutantsContaminationContiguous Zone

BT Zones

Continental BasinsBT Basins

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 13

Continental Hydrology (Cent) WATER RESOURCES THESAURUS

Continental HydrologyBT Hydrology

Continental Margin Continental Shelf Continental Slope

RT Insular SlopesContinuity Equation

RT Storage Equation Continuous Culture

USE Culturing TechniquesContinuous Flow

BT FlowContinuous Streams

BT Streams RT Ephemeral Streams

Perennial StreamsContour Irrigation

BT Irrigation Contour Terracing

BT TerracingContoursContract Administration

USE Contracts Contracts

UF Contract AdministrationRT Legal Aspects

Control FlumesBT Flumes

Control SystemsR T Check Structures

Controlled DrainageBT Drainage

Controlled StorageBT Storage

ConvectionRT Conduction

Convective PrecipitationBT Precipitation

Conveyance StructuresUF Lateral Conveyance Structures RT Aqueducts

PipelinesPipes

Water Conveyance Water Transport

Coolants Cooling

NT Water Cooling RT Air Conditioning

Refrigeration'Supercooling

Cooling PondsBT Ponds

Cooling Towers Cooling Water

BT Water RT Industrial Water

Water Cooling

CooperativesRT Organizations

CopepodsUF Calanus

CyclopsDiaptomus

BT CrustaceansCopper

BT Heavy MetalsCopper Compounds Copper Sulfate Corals

BT Coelenterates Core Drilling

BT Drilling Core Logging

BT Logging (Recording) Coregonus

USE CiscoCoresCoriolis Force Corn

UF Maize Corn Belt Correlation Analysis

RT Mathematical StudiesCorrelation Coefficient Corrosion

UF PittingRT Deterioration

FoulingScaling

Corrosion Control Corynebacterium

BT BacteriaCost Allocation

RT Economic AspectsCost Analysis

UF Cost EffectivenessCost Savings

RT Economic AspectsCost Effectiveness

USE Cost AnalysisCost Repayment

RT Economic AspectsCost Savings

USE Cost AnalysisCost Sharing

RT Economic AspectsCost-benefit Analysis

UF Benefit-cost Analysis Cost-benefit Ratio

Cost-benefit RatioUSE Cost-benefit Analysis

CostsUF Opportunity Costs

Total Costs

AT Capital CostsConstruction Costs Electric Power Costs Estimated Costs Maintenance Costs Marginal Costs Operating Costs Social Costs Water Costs

RT AccountingEconomic Aspects

CottonRT Textiles

Cottonwood TreesUF Populus

Cover Crops Coxsackie Virus

BT VirusesCrabs

UF Callinectes BT Crustaceans

CracksBT Mechanical Failure

Cranberries Crappie

BT Fish Crassostrea

USE OystersCraters Crayfish

BT CrustaceansCreeks

USE Streams Creep

RT Erosion

CreosoteCrescentic Lakes

USE Oxbow LakesCrest Gages

BT GagesCrib Dams

BT Dams Critical Depth Critical DischargeCritical Flow

BT FlowRT Channel Flow

Critical Velocity Crop Production(See Also Names of Crops)

RT Agriculture Agronomy Standing Crops

Crop Yield(See Also Names of Crops)Cropland

RT Cultivated Lands Farms

14 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Dating

Cross-sections Crude Oil

USE OilCrude Wastewater

USE Raw WastewaterCrustaceans

UF BosminaDecapods

BT Aquatic Animals NT Amphipods

BarnaclesCopepodsCrabsCrayfishDaphniaIsopodsLobstersOstracodsShrimpWaterfleas

Cryogenics Cryology

RT GlaciologyCrystal GrowthCrystalline Rocks

BT Rocks NT Basalts RT Granites

Igneous RocksLavaMetamorphic RocksPerliteRhyolites

Crystallization Crystallography

BT MineralogyCrystalsCulex

USE MosquitoesCultivated Lands

RT Agriculture Cropland

CultivationRT Agriculture

Cultural Control Culture Media

RT Agars Gels Growth Media

CulturesRT Hydroponics

Culturing TechniquesUF Axenic Culture

Batch Culture Continuous Culture Pure Cultures

CulvertsRT Aqueducts

Conduits Surface Drainage

Cumulative RunoffBT Runoff

Curing Current Meters

BT GagesCurrents

USE Water Currents Cuticular Transpiration

BT TranspirationCutoff Lakes

USE Oxbow LakesCutoffs

BT Channels R T Barriers

Cutting ManagementBT Forest Management .

Cyanide Cyanophyta

UF Blue-green Algae BT Algae NT Anabaena

AnacystisAphanizomenonMicrocystisNostocOscillatoria

Cyclic StorageBT Storage

Cycling NutrientsBT Nutrients

CyclonesBT StormsNT Tropical CyclonesRT Anticyclones

Cyclonic PrecipitationBT Precipitation

CyclopsUSE Copepods

CyclotellaBT Diatoms

CymbellaUSE Diatoms

CyprinusUSE Carp

DDaily Hydrographs

BT HydrographsDaily Storage

BT StorageDairy Industry

RT Animal Wastes Farms

Milk

DalaponDam Construction

BT ConstructionDam Design Dam Effects

RT Environmental Effects Dam Failure

RT Foundation Failure Dam Foundations Dam Stability Damage

NT Flood Damage Dams

NT Arch DamsButtress DamsCheck DamsCofferdamsConcrete DamsCrib DamsDetention DamsDiversion DamsEarth DamsFixed DamsGravity DamsHollow DamsHydraulic-fill DamsMill DamsMovable DamsMultiple Arch DamsNeedle DamsRockfill DamsRolled-earth DamsRolling DamsSausage DamsTilting Dams

RT Barriers Check Structures Dikes Earthworks Levees

WeirsDamsites Daphnia

BT Crustaceans Darcy-Weisbach Equation Darcys Law Data Acquisition Data Collections

NT Hydrologic Data Collections Meteorological Data Collection On-site Data Collections Weather Data Collections

Data InterpretationRT Experimental Data

Synoptic AnalysisData Processing

RT Automation Data Storage and Retrieval Data Transmission Dating

NT Groundwater Dating

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have Further subsets) 15

Dating (Cont.) WATER RESOURCES THESAURUS

Radioactive Dating RT Dendrochronology

ODD DDE DDTDead Loads Dead Storage

BT StorageDead Wells

BT WellsRT Negative Wells

Debris USE Detritus

Debris BasinsBT Basins

Debris ConeRT Alluvial Fans

Alluvial Plains

DebtRT Economic Aspects

DecapodsUSE Crustaceans

Deciduous ForestsBT ForestsRT Coniferous Forests

Deciduous TreesBT Trees

Decision MakingBT Administrative Decisions

Judicial Decisions

Decomposing Organic MatterUF HumusBT Organic MatterRT Detritus

DecompositionRT Degradation

DeteriorationDecontamination

RT CleanupDetoxification

Deep PercolationBT Percolation

Deep SeepageBT Seepage

Deep WaterBT WaterRT Aphotic Zone

Bottom Water Intermediate Water

Water Depth =Deep Wells

BT Wells

Deep-water HabitatsBT Habitats RT Environment

DeerDeficient Elements

BT Nutrients

Deflection Defoliants

RT Agricultural ChemicalsDeformation

BT Rheology Degradation

yVTVBiodegradationChemical Degradation Stream Degradation

RT Decomposition Denudation Deterioration

Erosion

Degradation ProductsRT Byproducts

Chemical Recovery Metabolites

DehydrationRT Drying

DehydrogenaseBT Enzymes

DeicersDeltasDemineralization

RT Desalination

Demonstration FarmsBT Farms

Demonstration WatershedsBT Watersheds

DendrochronologyRT Dating

DenitriflcationRT Nitrogen Removal

DensityUF Bulk Density

Physical Properties Drainage Density Moisture Density Population Density Snow Density Soil Density Specific Gravity

Viscosity

Density CurrentsBT Water CurrentsRT Bottom Currents

Salinity Currents Turbidity Currents

Density StratificationBT StratificationRT Thermal Stratification

DenudationRT Degradation

Erosion

Depletion.Vr Groundwater Depletion

Oxygen Depletion Seasonal Depletion Streamflow Depletion Transport Depletion

BT NT

RT

DepositionUF Deposition Rates BT Sedimentation

Deposition RatesUSE Deposition

DepreciationRT Economic Aspects

Depressed SewersBT Sewers

Depression HeadBT Drawdown

Depression SpringsBT Springs

Depression StorageUF Pocket Storage BT Storage

DepthUSE Water Depth

Depth-area-duration AnalysisRT Precipitation Intensity

Rainfall Intensity

DesalinationRT Demineralization

Desalination Apparatus Desalination Plants

BT Industrial Plants

Desalination WastesBT Industrial Wastes RT Brines

Desert PlantsRT Xerophytes

DesertsRT Arid Lands

DesiccantsDesiccation

USE DryingDesign Criteria Design Floods

UF Standard Project FloodBT FloodsNT Maximum Probable FloodsRT Hydraulic Design

Design FlowBT FlowRT Hydraulic Design

Design StandardsBT Standards

Design StormsBT Storms

Desilting Desilting Basins

BT BasinsRT Settling Basins

DesmidsBT Chlorophyta

DestratificationRT Lake Restoration

16 BT (broader term); NT (narrower term): .KT i related lerml; UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Distribution Patterns

Mixing Stratification

Turnover TimeDetection Limits Detection Times Detention Dams

BT DamsDetention Reservoirs

UF Retarding Reservoirs BT Reservoirs RT Storm Runoff

Urban RunoffDetention Time

RT Retention Time Detergents

RT Soaps Surfactants

DeteriorationRT Corrosion

Decomposition Degradation

Deterministic ModelsUSE Model Studies

DetoxificationRT Decontamination

Detrital FansUSE Alluvial Plains

DetritusUF DebrisBT Organic MatterRT Decomposing Organic Matter

DeuteriumRT Heavy Water

Developing CountriesRT Regional Development

DewBT Condensation

DewateringRT Sludge Drying

Sludge ThickeningDewpoint

BT CondensationDiagenesis

RT Sedimentation Dialysis

BT Membrane Processes Diaptomus

USE CopepodsDiatomaceous Earth Diatoms

UF Achnanthes Amphora Bacillariophyceae Chaetoceros Cymbella Navicula Phaeodactylum Stephanodiscus Tabellaria

Thalassiosira BT Chrysophyta NT Asterionella

CyclotellaFragilariaGomphonemaMelosiraNitzschia

Diazinon DieldrinDielectric Properties

USE Electrical PropertiesDiesel Oil

USE FuelDiets

RT Foods Nutrition

Differential EquationsRT Mathematical Studies

Differential Thermal Analysis Diffusion CoefficientDiffusion Wells

USE Recharge WellsDigested Sludge

BT Sludge Digestion

AT Aerobic Digestion Anaerobic Digestion Sludge Digestion Stage Digestion

Digital ComputersBT Computers

DikesBT Earthworks AT Spur Dikes RT Dams

Embankments Levees

DilutionUSE Wastewater Disposal

Dimensional AnalysisDimple Springs

BT Springs Dinobryon

USE ChrysophytaDinoflagellates

BT Pyrrophyta AT Amphidinium

CeratiumGonyaulaxGymnodiniumPeridinium

RT FlagellatesRed Tide

DiquatDirect Benefits

USE BenefitsDirect Flow

BT Flow

Direct IrrigationBT IrrigationRT Spray Irrigation

Disasters Discharge Capacity

BT CapacityDischarge Coefficient

RT Flow DischargeDischarge Frequency

RT Flow DischargeDischarge Hydrographs

BT Hydrographs Discharge Measurement

RT Zero Discharge Discount Rates

RT Economic AspectsDiseases

AT Animal DiseasesHuman DiseasesPlant Diseases

RT Infection Pathology

Diseconomies of Scale RT Economies of Scale

Disinfection Dispersants

RT Flocculation Oil Spills

SurfactantsDisposal Wells

BT WellsDissolved Organic Matter

USE Dissolved SolidsDissolved Oxygen

BT OxygenRT Aerobic Conditions

Anaerobic ConditionsResidual Oxygen

Dissolved SolidsUF Dissolved Organic Matter

DistillationAT Flash Distillation

Multieffect DistillationSolar DistillationVapor Compression Distillation

Distilled WaterBT Water

DistributionAT Annual Distribution

Diurnal Distribution Monthly Distribution Seasonal Distribution Spatial Distribution Temporal Distribution Vertical Distribution

Distribution GraphsBT Unit Hydrographs

Distribution PatternsRT Ecological Distribution

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 17

Distribution Reservoirs (Cont) WATER RESOURCES THESAURUS

Distribution ReservoirsBT Reservoirs

Ditch Grass Ditch Linings

BT LiningsDitches

NT Berm DitchesDiversion DitchesDrainage DitchesField DitchesIntercepting DitchesIrrigation DitchesOxidation DitchesShoulder Ditches

RT FurrowsOpen ChannelsTrenches

Diurnal DistributionBT Distribution

Diuron Diversion

BT RoutingNT Partial Diversion

Diversion ChannelsBT ChannelsRT Bypass Channels

Diversion DamsBT Dams

Diversion DitchesBT Ditches

Diversion LossesRT Water Loss

Diversion Structures Diversity Indices

USE Species Diversity Divides

USE WatershedsDobsonflies

BT Aquatic InsectsDocks

RT PiersDocumentation

RT AbstractsBibliographies Information Exchange Publications

Dolomite Domestic Animals(See Also Names of Domestic Animals)

RT Livestock Poultry

Domestic WastesUF Household Wastes BT Wastes RT Municipal Wastes

WastewaterDomestic Water

BT WaterRT Potable Water

DownstreamRT Upstream

DragBT Hydraulics RT Resistance

DragonfliesBT Aquatic Insects

Drain SpacingRT Drainage Practices

DrainageNT Controlled Drainage

Furrow Drainage Mine Drainage

Mole Drainage Open-channel Drainage Subsoil Drainage Subsurface Drainage Surface Drainage Tile Drainage Transverse Drainage Urban Drainage

Drainage AreaRT Basins

WatershedsDrainage Basins

USE Catchment AreasDrainage Canals

BT CanalsRT Drainage Ditches

Drainage Coefficient Drainage Density

BT DensityDrainage Districts Drainage Ditches

BT DitchesRT Drainage Canals

Drainage EffectsRT Environmental Effects

Drainage EngineeringBT Engineering

Drainage Equilibrium Drainage Networks

USE Drainage PatternsDrainage Patterns

UF Drainage NetworksDrainage Practices

RT Drain SpacingDrainage ProgramsDrainage SystemsDrainage TerraceDrainage Water

BT Water Drainage Wells

UF Absorbing WellsBT WellsAT Relief Wells

DrainsUF Gutters

AT Sink Drains Storm Drains Subsoil Drains Subsurface Drains Tile Drains

DrawdownAT Depression Head RT Selective Withdrawal

Water Level Water Table

Dredge SpoilUSE Spoil Banks

DredgingRT Ocean Dumping

Drift BottlesRT Floats

Drifting SnowBT SnowRT Blowing Snow

DriftwoodRT Aquatic Drift

Drill Holes Drill Monitors Drillers LogsRT Logging (Recording)

Drilling UF Well Drilling AT Cable Tool Drilling

Core Drilling Rotary Drilling

Drilling Equipment Drilling Fluids Drilling Rate Drilling Samples Drinking Water

RT Potable WaterDrip Irrigation

BT Irrigation Driving Head

RT Piezometric Head Water Level

DropsUSE Fluid Drops

DroughtR T Moisture Deficiency

Water Deficit Water Shortage

Drought Resistance Drowning

RT Submergence Drugs Drum

BT Fish Dry Farming

BT FarmingRT Farm Management

Dry LakesUSE Playas

18 BT (broader term); NT (narrower term); RT (related term): UF <used for); (lerms which have further subsets)

THESAURUS OF DESCRIPTORS Economic Yield

Dry Matter Dry Wells

BT Wells Drying

UF Desiccation NT Forced Drying

Freeze DryingSludge DryingVacuum Drying

R T DehydrationDual Media Filters

USE Filters Dual Purpose Plants

NT Industrial PlantsRT Multipurpose Projects

DucksBT Waterfowl

DuckweedUF Lemna

Ductility Dug Wells

BT Wells

DunalliellaBT Chlorophyta

Dune Sands USE Sand

DunesDupuit-Forchheimer Theory Durability Dust Storms

BT Storms

DustsDye Concentrations Dye Dispersion Dye Industry Wastes

BT Industrial Wastes

Dye ReleasesR T Tracers

DyesDynamic Programming

RT Systems AnalysisDynamics Dystrophic Lakes

BT LakesRT Oligotrophic Lakes

DystrophyBT Trophic Level

EEarly Impoundment

BT Reservoir StagesEarth Dams

BT DamsEarthworks

Earth PressureRT Earthquakes

Earth SatellitesUSE Satellite Technology

Earth-air InterfacesUSE Air-earth Interfaces

Earth-water InterfacesUF Water-earth InterfacesBT InterfacesRT Mud-water Interfaces

Sediment-water InterfacesEarthquake Engineering

BT EngineeringEarthquake Flood

RT Hooding Tsunamis

EarthquakesRT Earth Pressure

Seismic WavesEarthworks

NT Backfill Dikes

Earth Dams Embankments

LeveesRoadbanks

RT DamsEasements

RT Land Rights Legal Aspects Right-of-way

EchinodermsUF Sea Urchins BT Aquatic Animals

Ecological DistributionRT Distribution Patterns

EcologyEcological Effects

UF Pollution EffectsRT Environmental Effects

EcologyNT Physiological Ecology

Radioecology RT Biorhythms

Ecological DistributionEcosystemsEcotypes

Migration Nesting Niches Phenology Species Diversity Succession

EconometricsRT Economic Aspects

Economic AspectsRT Allotments

Amortization Appraisals Appreciation Bond Issues Budgeting

Capital Compensation Cost Allocation Cost Analysis Cost Repayment Cost Sharing

Costs DebtDepreciation Discount Rates Econometrics Economies of Scale Elasticity of Demand Elasticity of Supply Evaluation Expenditures ExportFinancial Feasibility Financing Foreign Trade Government Finance Government Supports GrantsGross National Product Import IncomeInput-output Analysis Insurance Interest Rates Investment Land Appraisals Loans Marketing Monetary Returns Monopoly Participating Funds Payment Prices Pricing ProfitPublic Investment Rate of Return Risks Subsidies Tariff Tax Rates

Taxes Value

Wages Water Rates

Economic Development Economic Efficiency Economic Evaluation Economic Feasibility Economic Growth Economic Impact Economic Justification Economic Life Economic Prediction

BT PredictionEconomic Rent Economic Yield

BT Yield

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 19

Economies of Scale (Cent.)

Economies of ScaleRT Diseconomies of Scale

Economic AspectsEcosystems

UF Aquatic EcosystemsBiological Communities

R T EcologyEcotypes

R T EcologyEddies

BT Water Currents RT Vortices

Eddy DiffusionUF Turbulent Diffusion

EducationUF Colleges

UniversitiesEel

UF Anguilla BT Fish

Effective CapacityBT Capacity

Effective PorosityRT Specific Yield

Effective PrecipitationBT Precipitation RT Net Rainfall

Precipitation ExcessEffective Storage

BT StorageEffective Velocity

BT VelocityEffluent Charges

RT Pollution TaxesEffluent Limitations Effluent Seepage

BT SeepageEffluent Standards

USE Water Quality StandardsEffluent Streams

UF Gaining Streams BT Streams

Effluents Eggs

AT Fish Eggs Eichornia

USE Water Hyacinth

Elastic PropertiesRT Plasticity

Elasticity of DemandRT Economic Aspects

Elasticity of SupplyRT Economic Aspects

ElastomersRT Rubber

Electric CablesUSE Electrical Equipment

Electric ConvertersUSE Electrical Equipment

Electric Currents Electric Fields Electric Potential Electric Power

NT Hydroelectric Power RT High Voltage

Electric Power CostsBT Costs

Electric Power Demand Electric Power Failure Electric Power IndustryRT Industrial Plants

Electric Power ProductionRT Geothermal Power

Hydroelectric Power Nuclear Energy Solar Energy

Electric Power Rates Electric Powerplants

BT PowerplantsElectrical Conductance

USE ConductanceElectrical Conductivity

USE ConductivityElectrical Engineering

BT EngineeringElectrical Equipment

UF Circuit BreakersElectric CablesElectric ConvertersElectrical InsulatorsGeneratorsPower TransformersTransducers

RT Electronic EquipmentInsulation

Electrical GroundingElectrical Insulators

USE Electrical Equipment

Electrical NetworksBT Networks

Electrical Properties(See Also Specific Electrical Properties)

UF Dielectric PropertiesElectrical StudiesRT Geophysics

Electrical TransmissionUF Substations RT Transmission Lines

Transmission TowersElectrical Well Logging

BT Logging (Recording)

Electro-osmosisBT Membrane Processes

ElectrochemistryRT Chemical Reactions

Electrolysis Electrodes

UF Membrane Electrodes NT Anodes

CathodesElectrodialysis

BT Membrane ProcessesElectrolysis

RT ElectrochemistryElectrolytes

JVT PolyelectrolytesElectromagnetic Waves

BT RadiationElectron Capture Gas

ChromatographyBT Chromatography

Electron MicroscopyBT Microscopy

Electronic EquipmentRT Electrical Equipment

ElectrophoresisElectroplatingElevation

RT AltitudeElodea Embankments

BT Earthworks RT Dikes

Levees Ridging

Embryonic Growth StageBT Growth Stages

Eminent DomainRT Legal Aspects

Emission SpectroscopyBT Spectroscopy

Employee RelationsRT Personnel Management

EmploymentUF Employment Opportunities RT Occupations

UnemploymentEmployment Opportunities

USE EmploymentEmulsifiers Emulsions

BT Colloids Encroachment

RT Saline Water Intrusion

Endrin Energy

UF Energy BalanceEnergy Balance

USE EnergyEnergy Conversion Energy Dissipation

RT Energy Loss

20 BT (broader term); NT (narrower term); RT (related term); UF (used for): (terms which have further >>ur>«.t:isi

THESAURUS OF DESCRIPTORS Essential Nutrients

Energy Equation Energy Gradient

RT Hydraulic GradientEnergy Loss

RT Energy Dissipation Energy Sources(See Also Specific Sources)

USE Fuel USE Geothermal Resources

Energy TransferEnforcementEngineering

NT Agricultural Engineering Chemical Engineering Civil Engineering Coastal Engineering Drainage Engineering Earthquake Engineering Electrical Engineering Environmental Engineering Hydraulic Engineering Irrigation Engineering Materials Engineering Mechanical Engineering Mining Engineering Nuclear Engineering Sanitary Engineering Soil Engineering Structural Engineering Systems Engineering

RT Environmental SanitationEngineering Geology

BT Geology

Engineering PersonnelBT Personnel

Enrichment Enteric Bacteria

BT BacteriaEnterobacter

BT Bacteria Enteroviruses

BT VirusesEnthalpy

UF Heat Content Entrainment Entropy

BT ThermodynamicsEnvironment

.Vr Aquatic Environment Esluarine Environment Lentic Environment Lotic Environment Marine Environment Microenvironment Neritic Environment Soil Environment

RT Aquatic HabitatsBenthic Environment Deep-water Habitats

Habitats Sites

Wilderness AreasEnvironmental Control Environmental Effects

UF Environmental SurveysPollution EffectsSiting

RT Dam EffectsDrainage EffectsEcological EffectsHighway EffectsIrrigation EffectsVegetation Effects

Environmental EngineeringBT Engineering

Environmental Gradient Environmental Impact Statement

UF Environmental SurveysEnvironmental Management

USE Environmental PolicyEnvironmental Policy

UF Environmental Management RT Public Policy

Environmental ProtectionBT Protection RT Pollution Load

Water Pollution ControlEnvironmental QualityEnvironmental SanitationRT Engineering

Environmental SurveysUSE Baseline Studies

Environmental Effects Environmental Impact Statement

Environmental TracersBT Tracers

Enzymes/V7" Dehydrogenase RT Catalysts

Ephemeral LakesBT LakesRT Evanescent Lakes

Intermittent LakesEphemeral Streams

BT StreamsRT Continuous Streams

Intermittent StreamsWadi

EphemeropteraUSE Insects

EpidemicsRT Public Health

EpidemiologyRT Public Health

EpidermisRT Plant Tissues

EpilimnionRT Hypolimnion

Thermal Stratification Thermocline

EpiphytesRT Hydrophytes

EpizootiologyRT Public Health

Epoxy ResinsBT Binders

Equalizing BasinsBT Basins

Equalizing ReservoirsBT ReservoirsRT Balancing Reservoirs

EquilibriumRT Neutralization

Equitable ApportionmentRT Legal Aspects

ErectionR T Construction

ErosionNT Accelerated Erosion

Bank Erosion Beach Erosion Channel Erosion Geologic Erosion Gully Erosion Rill Erosion Sediment Erosion Sheet Erosion Soil Erosion Stream Erosion Wind Erosion

RT Abrasion Accumulation

Avalanches Avulsion Creep

Degradation Denudation Landslides Mass Wasting Mudflows Rockslides

ScourSlope Degradation Soil Stability Solifluction Stream Degradation Talus Washouts Weathering

Erosion Control Erosion Rates Error Analysis Errors ERTS Escherichia Coli

BT Bacteria

EsoxUSE Pike

Essential NutrientsBT Nutrients

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 21

Esters (Coot) WATER RESOURCES THESAURUS

Esters(See Also Names of Esters) Estimated Benefits

USE Benefits Estimated Costs

BT Costs

Estimating Estimating Equations Estuaries

RT Coasts Estuarine Environment

BT EnvironmentEstuarine Fisheries

BT FisheriesEthers Ethics Euglena

BT Euglenophyta Euglenophyta

BT Algae NT Euglena

Euphotic ZoneBT ZonesRT Aphotic Zone

Eutrophic LakesBT LakesRT Oligotrophic Lakes

EutrophicationUF Algal Blooms

BloomsBT Trophic Level RT Algal Growth

Aquatic ProductivityRed Tide

EvaluationRT Economic Aspects

Evanescent LakesBT LakesRT Ephemeral Lakes

EvaporationNT Flash Evaporation

Lake EvaporationPan EvaporationReservoir Evaporation

RT SublimationWater Loss

Evaporation Area Evaporation Control Evaporation Discharge Evaporation Gages

BT Gages Evaporation Pans

RT Evaporimeters Evaporation Rate

UF Potential Evaporation Evaporators

UF Vertical Tube Evaporators

EvaporimetersUF Atmometers RT Evaporation Pans

EvapotranspirationRT Consumptive Use

Evapotranspiration Control Evapotranspiration PotentialEvolution

RT Adaptation Phytogeny Speciation

ExcavationUF ShaftsNT Rapid Excavation

Rock ExcavationExcess Rainfall

BT Rainfall RT Net Rainfall

Precipitation ExcessSurface Runoff

Excess WaterBT Water RT Soil Water

Excretion Expansion Expansive Cays

USE ClaysExpansive SoilsRT Soil Types

ExpendituresRT Economic Aspects

Experimental BasinsUF Experimental Watersheds BT Basins

Experimental DataRT Data Interpretation

Experimental Design Experimental Farms

BT FarmsExperimental Watersheds

USE Experimental BasinsExploitation

NT Resources DevelopmentExplorationExplosions

NT Nuclear ExplosionsExplosives

RT Hazardous MaterialsExport

RT Economic Aspects Import

ExposureUSE Population Exposure

Extended AerationUSE Aeration

Extensometers Extrusion Flow

RT Gravity Flow

FabricationRT Construction

FabricsRT Textiles

Factor AnalysisRT Mathematical Studies

Fall VelocityBT Velocity

Falling StageBT Stages

Water Level RT Water Level Fluctuations

FalloutRT Acid Rain

Aerosols Radioactive Wastes

Fallowing Farm Equipment Farm Lagoons

BT LagoonsFarm Management

RT Dry FarmingRange Management

Farm PondsBT Ponds

Farm UnitsUSE Farms

Farm WastesUF Agricultural WastesBT WastesNT Barn Wastewater

Feedlot WastesManure

RT Animal Wastes Industrial Wastes

Organic WastesFarming

NT Dry Fanning Fish Fanning

Shellfish Farming Wastewater Fanning

RT Agriculture Strip Cropping

FarmsUF Farm UnitsNT Demonstration Farms

Experimental Farms RT Agriculture

CroplandDairy Industry

Fate of PollutantsRT Path of Pollutants

Fathead MinnowsBT Fish

FathometersRT Sonar

22 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Fish

Fatigue Fatty Adds Fault Springs

UF Fissure SpringsFracture Springs

BT SpringsFaults

USE Geologic FracturesFauna

AT Benthic FaunaFeasibility Studies

RT Financial FeasibilityFecesFederal Jurisdiction

RT Political Aspects

Feeding RatesRT Animal Metabolism

Feedlot RunoffBT Agricultural Runoff

Runoff RT Animal Wastes

Feedlot WastesBT Barn Wastewater

Farm Wastes RT Animal Wastes

Feedlots Feeds

NT Fodder Hay Silage

Feedwater TreatmentBT Water Treatment

FencesUF Snow Fences

FensBT Wetlands RT Bogs

FermentationRT Anaerobic Conditions

Ferric Sulfate USE Sulfates

FerrobacillusBT Bacteria

FertilityFertilizationFertilizers

RT Agricultural Chemicals Manure

FescuesUSE Forages

FestucaUSE Grasses

FetchRT Waves

Fiber CropsRT Plant Fibers

Fibrous Beds Field Capacity

BT CapacityRT Maximum Available Water

Specific RetentionWilting Point

Field DitchesBT Ditches

Field InvestigationsUSE Field Tests

Field TestsUF Field Investigations RT On-site Tests

SitesField Wastes

BT Wastes

Fill PermitsBT Permits

Film WaterUSE Pellicular Water

FilmsNT Thin Films

Filter Cribs Filter Crops

RT Grassed Waterways Runoff

Soil StabilizationFilter Media Filter Rate Filtered Wastewater

BT Wastewater Filtered-water Reservoirs

UF Clear-water Reservoirs BT Reservoirs

FiltersUF Dual Media Filters AT Biofllters

Biological FiltersCarbon FiltersContact FiltersGravity FiltersIntermittent FiltersMembrane FiltersPacked BedsPercolating FiltersSand FiltersSludge FiltersSoil FiltersSubsurface FiltersTrickling FiltersVacuum FiltersWell Filters

RT ScreensSieves

Filtrate Filtration

BT Wastewater TreatmentWater Treatment

AT BiofiltrationHyperfiltrationUltrafiltration

Vacuum Filtration RT Clarification

PercolationFiltration Springs

BT SpringsRT Seepage Springs

Financial FeasibilityRT Economic Aspects

Feasibility StudiesFinancing

RT Economic Aspects Fine Textured Soil

USE Soil TextureFinite Difference Methods

RT Mathematical Studies Finite Element Method

RT Mathematical StudiesFir Trees

UF AbiesFirn

RT Glaciers Snow

Fish(Includes both Marine and Freshwater)

BT Aquatic Animals AT Alewife

Anadromous FishBassBluegillsBuffalo FishBullheadCarpCarpsuckerCatfishChubsCichlidCiscoCrappieDrumEelFathead MinnowsFloundersGambusiaGarGoldfishGuppiesHerringKillifishLampreyMenhadenMulletPerchPikeRoachSalmonSculpinShadSharkShinerSilversideSmeltSmoltSnail DarterStickleback

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 23

Fish (Cont.) WATER RESOURCES THESAURUS

SturgeonSuckerSunfishTilapiaTroutTunaWhiteflsh

Fish BarriersBT Barriers

Fish BehaviorBT Behavior

Fish ConservationBT Conservation

Fish Control AgentsRT Rotenone

Fish DietsRT Fish Food

Fish DiseasesBT Animal Diseases

Fish EggsBT Eggs RT Hatching

SpawningFish Establishment Fish Farming

BT AquacultureFarming

;Vr Catfish FarmingFish Food

BT FoodsNT Fish Food OrganismsRT Fish Diets

Fish Food OrganismsBT Aquatic Life

Fish FoodFish Gills

USE Gills .

Fish GrowthUSE Growth

Fish GuidingFish Handling FacilitiesFish HarvestFish Hatcheries

UF Hatcheries Fish Ladders Fish Management Fish Migration

BT Migration

Fish ParasitesBT Animal Parasites RT Animal Diseases

Fish Passages Fish Physiology

BT Animal Physiology

Fish PondsBT Ponds

Fish PopulationsBT Populations

Fish Stocking Fish Toxins

BT ToxinsFisheries

NT Estuarine Fisheries Lake Fisheries Marine Fisheries ; Reservoir Fisheries Stream Fisheries

FishingAT Commercial Fishing

Sport Fishing RT Recreation

Fishing Gear FishkillFissure Springs

USE Fault SpringsFissure Water

BT Water Fissures

USE Geologic FracturesFixed Dams

BT DamsFixed Groundwater .

BT GroundwaterFixed Wheel Gates

BT Gates Fjords FlagellatesRT Dinoflagellates

Flame lonization Gas Chromatography

USE Gas ChromatographyFlame Photometry

BT PhotometryFlash Distillation

BT Distillation.V7 Multistage Flash Distillation

Flash EvaporationBT Evaporation

Flash FloodsBT Floods

Flashy StreamsBT Streams

FlatwormsUSE Platyhelminthes .

FlavobacteriumBT Bacteria

FlexibilityRT Plasticity

FliesUSE Insects

FloatingRT Aquatic Drift

FlotsamFloating Ice

BT Ice

RT Icebergs Floating Plants

BT Aquatic PlantsFloats

RT Drift BottlesFlocculation

BT Wastewater TreatmentWater Treatment

RT Chemical CoagulationDispersants

Flood BasinsBT Basins

Flood BenefitsUSE Benefits

Flood ChannelsBT Channels .

Flood ControlUF Flood Prevention RT Flood Protection

Flood-control StorageFloodproofing

Flood Crest Flood Damage

BT DamageRT Floodproofing

Flood Data Flood Discharge

RT Flow DischargeFlood Flow

BT FlowFlood Forecasting

BT Forecasting

Flood Frequency Flood Hydrographs

BT Hydrographs

Flood IrrigationBT Irrigation RT Flooding

Flood PeakUF Peak Discharge

Peak Flow ;V7" Maximum Probable Floods

Flood Plain Management Flood Plain Zoning

BT ZoningFlood Plains

NT Bottomland RT Flow Channels

Flood Prevention , USE Flood Control

Flood ProfilesBT ProfilesRT Indirect Flood Measurement

Flood Protection,BT Protection RT Flood Control

Headwater Control

24 BT (broader term); NT (narrower term); RT (related term): UF,(used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Flumes

Flood Recurrence Interval Flood Routing

BT RoutingFlood Spreading

RT Well FloodingFlood Stages Flood Waves

BT Waves Flood-control Storage

BT StorageRT Flood Control

FloodgatesBT Gates

FloodingUF Inundation RT Earthquake Flood

Flood IrrigationFloodproofing

RT Flood Control Flood Damage

FloodsNT Annual Floods

---Design Floods Flash Floods Historic Roods Regional Floods Tidal Roods

FloodwaterBT Water

FloodwaysRT Aqueducts

FloraNT Benthic Rora RT Plant Populations

FlotationFlotsam

RT Aquatic Drift Roating

FloundersUF Plaice BT Fish

FlowNT Accelerated Flow

Artesian Flow Average Row Base Row Cavern Flow Cavitation Channel Row Closed-conduit Flow Compressible Flow Continuous Row Critical Row Design Row Direct Row Flood Row Fluid RowGradually-varied Row Gravity Row Heat Row High Row

Instream Row Irrigation-return Row

Laminar Row Low Row Maximum Flow Minimum Row Multiphase Row Natural Row Nonnewtonian Row Nonuniform Row Open-channel Row Orifice Row Overland Row Pipe Row Plane Row Plug Row Potential Row Rapid Row Regulated Row Retarded Flow Return Row River Row Rotational Flow Saturated Row Sinuous Row Steady Flow Stratified Flow Slreamflow Surface Row Tranquil Flow Transition Flow Turbidity Flow Turbulent Flow Underflow Uniform Flow Unsaturated Flow Unsteady Flow Varied Flow Vertical Flow Viscous Flow

RT Alteration of Flow Backblowing Capillarity Friction Loss

Percolation Stream Upflow Vortices

Flow Around Objects Flow Augmentation Flow Bogs

BT BogsFlow ChannelsRT Flood Plains

Flow CharacteristicsRT Hydraulics

HydrodynamicsFlow Control

RT GroinsLow-flow Augmentation Reservoir Releases

Flow DischargeUF Water FlowRT Discharge Coefficient

Discharge Frequency Flood Discharge

Flow RatesStage-discharge Relations Stream Discharge

Yield Zero Discharge

Flow Duration now Friction

BT FrictionFlow IndexFlow MeasurementFlow Nets

BT Nets Flow Obstruction

USE Obstruction to Flow Flow Pattern Flow Profiles

BT ProfilesRT Backwater Curve

Gradually-varied FlowFlow Rates

RT Flow Discharge Runoff Rates

Flow Regulators Flow Resistance Flow Separation Flow System Flow Velocity Flowering Flowing Wells

BT WellsFlowmeters

BT Gages Fluctuations

UF FluxNT Water Level Fluctuations

Fluid DropsUF Drops

Fluid DynamicsUSE Hydrodynamics

Fluid FlowBT Flow

Fluid FrictionUSE Friction

Fluid MechanicsRT Cavitation

Hydraulic Gradient Hydraulic Jump Hydraulic Properties

Hydraulics Hydrodynamics

Fluidized Bed ProcessBT Wastewater Treatment

Fluidized Beds Flumes

AT Bench Flumes Control Flumes Heud Flumes Rating Flumes

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which'have further subsets) 25

Flumes (Cont) WATER RESOURCES THESAURUS

RT Aqueducts Channels

Chutes Sluices

FluorescenceNT X-ray Fluorescence

FluoridationFluoridesFluorine

BT HalogensFluorometry Flushing Fluvial Sediments

BT SedimentsRT Alluvial Deposits

FluxUSE Fluctuations

Fly Ash Foam Fractionation

USE Foam Separation

Foam SeparationUF Foam Fractionation BT Wastewater Treatment

FoamingRT Aerosols

FodderBT Feeds

FogNT Ice Fog RT Clouds

Food Chains Food HabitsRT Behavior

Food Processing IndustryRT Industrial Plants

Food-processing WastesBT Industrial Wastes

FoodsNT Fish Food RT Diets

Nutrition

Forage GrassesUSE Forages

Forages(See Also Names of Forage Grasses)

UF FescuesForage Grasses

RT Grasses

ForaminiferaBT Protozoa

Forced DryingBT Drying

Forebays Forecasting

NT Flood Forecasting River Forecasting Runoff Forecasting Streamflow Forecasting

Weather Forecasting R T Prediction

ProjectionsForeign Construction

BT ConstructionForeign Design Practices Foreign Projects Foreign Research

UF Foreign TestingForeign Testing

USE Foreign ResearchForeign Trade

RT Economic Aspects Foreign Waters Forest Fires Forest Hydrology

BT Hydrology Forest Litter

USE Litter

Forest ManagementAT Clear-cutting

Cutting Management Logging

Forest SoilsRT Soil Types

Forest WatershedsBT Watersheds

Forestry Forests

AT Coniferous Forests Deciduous Forests Mixed Forests Rain Forests

RT TreesFortran

RT Computer Programs Fossil Fuels

USE FuelFossil Water

USE Connate Water Fouling

R T Corrosion Scaling

Foundation FailureRT Dam Failure

Foundation PilesUSE Piles

Foundation RocksBT Rocks

Fourier AnalysisRT Mathematical Studies

Fracture PermeabilityBT PermeabilityRT Groundwater Movement

HydrologyFracture Springs

USE Fault Springs

Fractures USE Geologic Fractures

FragilariaBT Diatoms

Frail LandsFrancis Turbines

USE TurbinesFrazil Ice

UF Needle Ice BT Ice

Free MoistureUSE Free Water

Free Surfaces Free Water

UF Free MoistureGravitational Water Gravity Water Infiltration Water

BT WaterRT Gravity Groundwater

Freeze DryingBT Drying

Freeze-thaw Tests Freezing

RT Ice Formation

Frequency AnalysisRT Mathematical Studies

Regional Analysis

Frequency DistributionRT Probability Distribution

FrictionUF Fluid Friction NT Flow Friction

Friction LossRT Flow

Fringe WaterUF Anastatic Water RT Soil Water

FrogsBT Amphibians

Fronts USE Weather

FrostBT Condensation AT Hoar Frost RT Rime

Frost Heaving BT HeavingRT Frost Thrusting

Frost Prevention Frost Protection

BT Protection Frost Thrusting

RT Frost HeavingFrothing Froude Number Frozen Ground

RT Permafrost

26 BT (broader term); NT (narrower term): RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Geomorphology

Fruit Crops Fucus

BT Phaeophyta

FuelUF Diesel Oil

Energy SourcesFossil Fuels

NT CoalGasolineNatural Gas

RT Fuel ReprocessingOil

Fuel Oil USE Oil

Fuel ReprocessingRT Fuel

Nuclear Powerplants Radioactive Wastes

Fugitive WaterBT Water

Fully Penetrating WellsBT Wells

Fulvic Acids Fumigants

BT Pesticides

FundulusUSE Killifish

FungiNT Aquatic Fungi

FusariumMoldsPathogenic FungiSoil FungiVerticilliumYeasts

RT MildewsFungicides

BT Pesticides

Funicular WaterBT WaterRT Pellicular Water

Furrow DrainageBT Drainage

Furrow IrrigationBT Irrigation

FurrowsR T Ditches

FusariumBT Fungi

Future PlanningBT Planning

Fyke NetsBT Nets

Gabions Gages

AT Bubble GagesCrest GagesCurrent MetersEvaporation GagesFlowmetersRain GagesSlope GagesStrain GagesStream GagesVenturi MetersWind Gages

RT SensorsGagingGaging Stations Gaining Streams

USE Effluent StreamsGambusia

BT Fish Game Birds

USE BirdsGamma Radiation

BT Radiation RT X-rays

GammarusBT Amphipods

GarBT Fish

Garbage DumpsRT Landfills

Waste DumpsGas Chromatography

UF Flame lonization GasChromatography

BT ChromatographyGas Liquid Chromatography

BT ChromatographyGasification

NT Coal GasificationGasoline

BT FuelGastropods

UF Littorina BT Mollusks

GatesAT Bulkhead Gates

Coaster Gates Fixed Wheel Gates Floodgates High Pressure Gates Hydraulic Gates Intake Gates Radial Gates Roller Gates Slide Gates Sluice Gates Spillway Gates

RT LocksGeese

BT WaterfowlGels

RT ColloidsCulture Media

GeneratorsUSE Electrical Equipment

Geochemistry Geography

NT OrographyGeohydrologic Boundaries

BT BoundariesGeohydrologic Units

R T HydrologyGeohydrology

USE GeohydrologyGroundwater Hydrology

Geologic Control Geologic Erosion

BT Erosion Geologic Faults

USE Geologic Fractures Geologic Fissures

RT Geologic Fractures

Geologic FormationsAT Aquicludes

Aquitards Bedrock Geologic Units

Geologic FracturesUF Faults

FissuresFracturesGeologic Faults

RT Geologic FissuresGeologic History Geologic Joints Geologic Mapping

BT MappingGeologic Time

AT Cenozoic Era Mesozoic Era Paleozoic Era Precambrian Era

Geologic UnitsBT Geologic Formations

Geological SurveysBT Surveys

Geological TerracesUF Terraces

GeologyAT Engineering Geology

Marine Geology Structural Geology

GeomorphologyUF Coastal Geomorphology

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 27

Geophysics (Coot) WATER RESOURCES THESAURUS

GeophysicsNT Borehole Geophysics RT Electrical Studies

Geothermal StudiesGravity StudiesMagnetic StudiesSeismology

Geothermal PowerRT Electric Power Production

Geothermal ResourcesUF Energy Sources BT Natural Resources RT Resources Development

Geothermal StudiesRT Geophysics

GeotropismBT Tropisms

Germination Geysers

UF Pulsating Springs BT Springs RT Sand Boils

Thermal SpringsGill Nets

BT NetsGills

UF Fish Gills Glacial Aquifers

BT AquifersGlacial Debris

USE Glacial Drift Glacial Deposits

USE Glacial Drift Glacial Drift

UF Glacial DebrisGlacial Deposits

RT IcebergsMorainesOutwash

Glacial LakesBT Lakes

Glacial SedimentsBT Sediments

Glacial SoilsRT Soil Genesis

Glacial StreamsBT Streams

GlaciationRT Cirques

Glacier BalanceUF Glacier Budget

\Glacier BudgetUSE Glacier Balance

Glacier Mass Balance Glacier Surges

BT SurgesGlaciers

RT Ablation

FirnKinematic Wave Theory

GlaciohydrologyBT Hydrology

GlaciologyRT Cryology

Glucose Goats Gold Gold Radioisotopes

BT RadioisotopesGoldfish

UF Carassius BT Fish

Golf CoursesBT Recreation Facilities

GomphonemaBT Diatoms

GonyaulaxBT Dinoflagellates

GorgesUSE Canyons

Government FinanceRT Economic Aspects

Government SupportsRT Economic Aspects

Governmental InterrelationsNT Interagency Cooperation RT Political Aspects

Graded StreamsBT Streams RT Poised Streams

Regime StreamsGrading Gradually>varied Flow

BT FlowRT Flow Profiles

Grain Crops(See Also Names of Grain Crops) Grain Size

USE Particle Size Grama Grasses

BT Grasses

GranitesRT Crystalline Rocks

GrantsRT Economic Aspects

Graphical AnalysisRT Mathematical Studies

Graphical MethodsRT Mathematical Studies

Grassed WaterwaysRT Filter Crops

WatercoursesGrasses(See Also Names of Grasses)

UF Festuca

NT Grama GrassesRange GrassesTurf Grasses

RT ForagesLawns

GrasslandsRT Meadows

Pastures Prairies Steppes

Gravel Gravel Packing

RT Well FiltersGravitational Water

USE Free WaterGravity Dams

BT DamsGravity Filters

BT FiltersGravity Flow

BT FlowRT Extrusion Flow

Gravity GroundwaterBT Groundwater RT Free Water

Vadose WaterGravity Springs

BT SpringsGravity StudiesRT Geophysics

Gravity WaterUSE Free Water

Gravity WavesBT WavesRT Capillary Waves

Grazing Grease

NT Wool Grease Green Algae

USE ChlorophytaGreenhouses

RT Growth ChambersGroins

RT Flow Control Jetties

Gross National ProductRT Economic Aspects

Ground IceBT Ice

GroundwaterUF Phreatic Water

Subterranean WaterBT Subsurface Water

WaterNT Attached Groundwater

Confined Groundwater Fixed Groundwater Gravity Groundwater Malenclaves Perched Groundwater

28 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Hardwood

Perched Horizon Plerotic Groundwater

Groundwater AvailabilityRT Available Water

Moisture AvailabilityGroundwater Barriers

UP Groundwater DamsBT BarriersRT Aquicludes

Impervious Soils Obstruction to Flow Saline Water Barriers

Groundwater BasinsBT Basins NT Watersheds RT Aquifers

Artesian BasinsGroundwater Budget

UF Groundwater Inventory Groundwater Contamination

USE Groundwater Pollution Groundwater Dams

USE Groundwater BarriersGroundwater Dating

BT DatingGroundwater Depletion

BT DepletionRT Groundwater Recession

Groundwater DevelopmentUSE Groundwater Potential

Groundwater DivideGroundwater Flow

USE Groundwater Movement Groundwater Runoff

Groundwater HydrologyUSE Geohydrology

Groundwater IncrementUSE Groundwater Recharge

Groundwater InventoryUSE Groundwater Budget

Groundwater IrrigationBT Irrigation

Groundwater LevelRT Groundwater Recession

Water LevelGroundwater Management

BT Water ManagementGroundwater Mining

UF Groundwater Prospecting RT Water Supply Development

Groundwater MovementUF Groundwater Flow AT Base Flow RT Capillary Conductivity

Fracture Permeability Infiltration Percolation Seepage

Subsurface Drainage Water Table Fluctuations

Groundwater PollutionUF Groundwater Contamination BT Water Pollution

Groundwater PotentialUF Groundwater Development

Groundwater ProspectingUSE Groundwater Mining

Groundwater RecessionBT Recession RT Groundwater Depletion

Groundwater LevelGroundwater Recharge

UF Groundwater Increment BT Recharge RT Artificial Recharge

Induced InfiltrationGroundwater Reservoirs

R T Aquifers Groundwater Runoff

UF Groundwater Flow BT Runoff RT Base Flow

Percolating WaterSpring WaterSurface Runoff

Groundwater StorageBT Storage RT Aquifers

Artificial RechargeGroundwater Waves

UF Phreatic Waves BT Waves

Groundwater-surface Relations USE Surface-groundwater Relations

Grouting Growth

UF Fish Growth Growth Chambers

RT Greenhouses Growth Kinetics

BT Kinetics Growth Media

RT Culture MediaGrowth Rates Growth Stages

NT Embryonic Growth Stage Immature Growth Stage Juvenile Growth Stage Larval Growth Stage Mature Growth Stage

GuidelinesUSE Standards

GulfsRT Bays

GulliesBT Ravines RT Arroyos

GullsBT Water Birds

BT RT

Gully ErosionUF Gullying

Ravinement ErosionChannel Erosion Rill Erosion Sheet Erosion

GullyingUSE Gully Erosion

GuniteBT Concretes

GuppiesBT Fish

GuttersUSE Drains

GymnodiniuraBT Dinoflagellates

Gypsum

HHabitats

AT Aquatic HabitatsDeep-water Habitats Wildlife Habitats

R T Environment Sites

HailBT Precipitation RT Sleet

Half-life USE Radioactive Half-life

HalidesHalogenated Pesticides

BT PesticidesHalogens

NT Bromine Chlorine

Fluorine Iodine

RT Residual ChlorineHalogeton Halophytes

RT Salt ToleranceHandbooks

RT PublicationsHarbors Hardness

BT Chemical Properties Hardpan Soils

BT Soil Types AT Subsoil

Hardpan SpringsBT Springs

HardwoodUF Wood RT Lumber

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 29

WATER RESOURCES THESAURUS

HatcheriesUSE Fish Hatcheries

HatchingRT Fish Eggs

Incubation Spawning

HayBT Feeds

Hazardous MaterialsRT Explosives

Poisons Toxins

HazardsRT Accidents

SafetyHaze

USE Air Pollution Hazen-Williams Equation Head Flumes

BT FlumesHead Loss Headwater Control

RT Flood ProtectionHeadwaters

RT Upstream Heat

AT Latent HeatHeat Balance

R T Physical PropertiesHeat BudgetRT Physical Properties

Heat ContentUSE Enthalpy

Heat ExchangeUSE Heat Transfer

Heat ExchangersRT Boiling Water Reactors

Heat HowBT RowRT Physical Properties

Heat Resistance Heat Transfer

UF Heat ExchangeRT Thermal Conductivity

Heat Treatment Heat-capacity Method Heated Water

UF Thermal Plumes BT WaterRT Thermal Pollution

Thermal Water

Heating Heaving

.V7 Frost Heaving

Heavy Metals(See Also Specific Metals)

BT Metals NT Antimony

RT

BariumCadmiumCesiumChromiumCobaltCopperIronLeadManganeseMercuryMolybdenumNickelSilverStrontiumTinTitaniumVanadiumZincZirconiumTrace Elements

Heavy WaterBT Water RT Deuterium

TritiumHele-Shaw Models

USE Model Studies HeliumHemlock Trees Heptachlor Herbicides

BT Pesticides Herring

UF AlosaClupea

BT FishHeterogeneity Heterotrophic Bacteria

BT Bacteria High Flow

BT RowHigh Pressure

RT Pressure DistributionHigh Pressure Gates

BT Gates

High VoltageRT Electric Power

High Water Markflr Water Level Fluctuations

Highway BeautificationBT Landscaping RT Aesthetics

Highway EffectsRT Environmental Effects

Highway Icing Highway Relocation

BT RelocationHighways

BT Roads

Histograms Histology Historic Floods

BT Floods History Hoar Frost

BT Frost RT Rime

HogsHolding Ponds

USE Stabilization Ponds Holding Tanks

USE Storage TanksHoldover Storage

BT StorageHollow Dams

BT DamsHolomictic Lakes

BT LakesRT Meromictic Lakes

Homogeneity Horizontal Wells

BT Wells Horseshoe Lakes

USE Oxbow Lakes Horticulture

RT Agriculture Hortons Law Hospitals Hot Brines

USE Brines Hot Springs

BT SpringsRT Warm Springs

Household WastesUSE Domestic Wastes

Housing Human Diseases

BT DiseasesHuman Pathology

BT PathologyHuman PhysiologyHuman Population

BT PopulationsHumic Acids Humid Areas Humid Climates

BT ClimatesHumidity

AT Relative Humidity Specific Humidity

RT MoistureHumus

USE Decomposing Organic MatterHumus Sludge

BT Sludge

30 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Hydrothermal Studies

HuntingRT Recreation

HurricanesBT Storms

Hybrid ComputersBT Computers

HydrantsHydrate ProcessesHydratesHydrationHydraulic Conductivity

USE Permeability Coefficient Hydraulic DesignRT Design Floods

Design Flow Hydraulic Geometry

Hydraulic EngineeringBT Engineering

Hydraulic EquipmentRT Hydraulic Machinery

Hydraulic ValvesHydraulic Fill Hydraulic Fracturing Hydraulic Friction

RT Roughness Coefficient

Hydraulic GatesBT Gates

Hydraulic GeometryRT Hydraulic Design

Hydraulic Grade Hydraulic Gradient

RT Energy Gradient Fluid Mechanics

Hydraulic JumpRT Fluid Mechanics

Hydraulic Loading Hydraulic Loss Hydraulic Machinery

RT Hydraulic Equipment Hydraulic Mining

RT Placer MiningHydraulic Models

BT Model StudiesRT Hydraulic Similitude

Hydraulic PermeabilityBT Permeability

Hydraulic ProfilesBT Profiles

Hydraulic PropertiesRT Fluid Mechanics

Hydraulic Radius Hydraulic Roughness

RT Roughness Coefficient

Hydraulic SimilitudeRT Hydraulic Models

Hydraulic Structures(See Also Names of Hydraulic Structures)Hydraulic Systems Hydraulic Transients Hydraulic Transportation Hydraulic Turbines

BT TurbinesHydraulic Valves

RT Hydraulic EquipmentHydraulic-fill Dams

BT DamsHydraulics

NT DragSewer HydraulicsTidal HydraulicsTunnel HydraulicsWell Hydraulics

RT Flow CharacteristicsFluid Mechanics

Hydrobiology Hydrocarbons

UF Aromatic Hydrocarbons Petroleum Hydrocarbons

NT Aliphatic Hydrocarbons Chlorinated Hydrocarbons

Hydrochloric Acid Hydrodynamics

. UF Fluid Dynamics RT Row Characteristics

Fluid Mechanics Hydrology

Hydroelectric PlantsBT Powerplants

Hydroelectric PowerBT Electric PowerRT Electric Power Production

Hydrofoils HydrogenHydrogen Bonding

USE BondingHydrogen Ion Concentration

UF pHHydrogen Sulfide Hydrogenation Hydrograph Analysis Hydrographs

NT Compound Hydrographs Daily Hydrographs Discharge Hydrographs Flood Hydrographs

Unit Hydrographs Well Hydrographs

Hydrography Hydrologic AspectsHydrologic Balance

USE Hydrologic Budget Hydrologic Basins

USE Watersheds

Hydrologic BudgetUF Hydrologic Balance

Water Balance Water Budget

Hydrologic CycleUF Water Cycle

Hydrologic Data Hydrologic Data Collections

BT Data Collections Hydrologic Equation

UF Water-balance EquationHydrologic Maps

BT MapsHydrologic Models

BT Model StudiesNT Stanford Watershed Model

Hydrologic Properties Hydrologic Systems Hydrological Regime

UF Regime Regimen

RT Water ImportingHydrology

NT Agricultural Hydrology Areal Hydrogeology Arid-zone Hydrology Continental Hydrology Forest Hydrology Glaciohydrology Karst Hydrology Paleohydrology Parametric Hydrology Stochastic Hydrology Synthetic Hydrology Urban Hydrology

RT Fracture Permeability Geohydrologic Units Hydrodynamics

Hydrolysis Hydrometeorology

RT River ForecastingHydrometers Hydrometric Stations Hydrometry Hydrophase Diagrams Hydrophones Hydrophytes

UF Hygrophytes RT Epiphytes

MesophytesXerophytes

HydroponicsRT Cultures

Hydrostatic LevelRT Water Level

Hydrostatic PressureRT Artesian Pressure

Physical PropertiesHydrothermal Studies

RT Physical Properties

BT (broader term); NT (narrower term): RT (related lermi: UF (used for): (terms which have further subsets) 31

Hydrothermal Studies (Cont) WATER RESOURCES THESAURUS

Thermal Properties Hyetographs Hygrometry Hygrophytes

USE HydrophytesHygroscopic Capacity

USE Hygroscopic Coefficient Hygroscopic Coefficient

UF Hygroscopic CapacityNT Soil WaterRT Hygroscopic Water

Hygroscopic MoistureUSE Hygroscopic Water

Hygroscopic WaterUF Absorbed Water

Hygroscopic MoistureBT WaterRT Hygroscopic Coefficient

Soil WaterHyperfiltration

BT FiltrationHypolimnion

RT Bathylimnion Clinolimnion Epilimnion Thermal Stratification

Hypsometric AnalysisUF Area- Altitude Analysis

HysteresisRT Soil Water

IceUF Ice Crystals NT Anchor Ice

Floating Ice Frazil Ice Ground Ice Interstitial Ice Lake Ice Pressure Ice Rotten Ice Screw Ice Sea Ice Shale Ice

Ice Breakup Ice CoverIce Crystals

USE Ice Ice Drift Ice Fog

BT FogIce Formation

RT FreezingIce Gorge

USE Ice JamsIce Jams

UF Ice Gorge

Ice Lenses Ice Loads Ice Pressure Ice Run Ice Skating

RT RecreationIce Thickness Ice-brine Systems Ice-water Interfaces

UF Water-ice Interfaces BT Interfaces

IcebergsRT Floating Ice

Glacial DriftIced Lakes

BT LakesIctalurus

USE CatfishIgneous Rocks

BT RocksRT Crystalline Rocks

IlliteImmature Growth Stage

BT Growth StagesImmiscibility

BT Chemical PropertiesImpaired Water Quality

RT Water QualityImpaired Water Use

BT Water UseImpedance

RT ConductanceImpellers Impervious Beds Impervious Boundaries

BT BoundariesImpervious Membranes

BT MembranesImpervious Soils

RT Ground water BarriersSoil Compaction

Soil TypesImport

RT Economic Aspects Export

Imported WaterBT Water

ImpoundmentsUSE Reservoirs

In Situ Tests In-bank Capacity

BT Capacity Incineration

UF Burning RT Waste Disposal

Incised RiversBT Rivers

IncomeRT Economic Aspects

Income DistributionIncome Distribution

RT Income Incubation

RT Hatching Indexing

RT Information RetrievalIndicators

NT Bioindicators Indirect Benefits

USE BenefitsIndirect Flood Measurement

RT Flood ProfilesInduced Infiltration

UF Induced RechargeBT InfiltrationRT Artificial Recharge

Groundwater Recharge, Recharge

Induced RechargeUSE Induced Infiltration

Industrial DevelopmentRT Industrial Production

PlanningIndustrial Plants

BT Dual Purpose PlantsNT Canneries

Concrete Plants Desalination Plants

Mills Oil Refineries

Powerplants RT Chemical Industry

Electric Power Industry Food Processing Industry Lumber Industry Meat Processing Industry Mineral Industry

Oil Industry Pulp and Paper Industry

Steel IndustryIndustrial Production

RT Industrial Development Resources Development

Industrial WastesUF Manufacturing Wastes

Refinery WastesTrade Wastes

BT Wastes NT Bleaching Wastes

Chemical WastesDesalination WastesDye Industry WastesFood-processing WastesMetal-finishing WastesMine WastesOil WastesPhenolsPulp WastesSawdustTannery Wastes

32 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Intermediate Water

Textile Mill Wastes RT Brines

Farm Wastes Liquid Wastes Municipal Wastes Radioactive Wastes Solid Wastes

Industrial WastewaterBT Wastewater

Industrial WaterUF Industrial Water UseBT WaterRT Cooling Water

Industrial Water UseUSE Industrial Water

Water UseInfectionRT Diseases

PathologyInfiltration

NT Induced Infiltration Rainfall Infiltration Sewer Infiltration

RT Ground water Movement Leac hates Leaching

Percolation Seepage

Infiltration Capacity BT Capacity RT Infiltration Rate

Infiltration Coefficient Infiltration Diversion Infiltration Index Infiltration Rate

UF Infiltration Velocity RT Infiltration Capacity

Infiltration VelocityUSE Infiltration Rate

Infiltration WaterUSE Free Water

InfiltrometersBT Moisture Meters

Influence BasinsBT Basins

Influent SeepageBT Seepage

Influent StreamsUF Losing Streams BT Streams

Influent WaterBT Water

Information ExchangeRT Documentation

LibrariesInformation Retrieval

RT Indexing Libraries

Information SystemsRT Libraries

Infrared ImageryRT Aerial Photography

Remote SensingInfrared Radiation

BT Radiation Infrared Spectrophotometry

USE SpectrophotometryInfrared Spectroscopy

BT Spectroscopy Inhibition

RT Retardance Inhibitors

RT Limiting Factors Retardants

Initial PrecipitationBT Precipitation

InjectionBT Recharge

Injection WellsUF Input Wells ,BT WellsRT Recharge Wells

Underground Waste DisposalInjunctions

RT Legal Aspects

Injunctive ReliefRT Legal Aspects

Inland WaterwaysBT Waterways RT Canals

Navigable RiversInlet Wells

BT WellsInlets Inorganic Acids

BT Acids Inorganic Compounds(See Also Names of Compounds) Inorganic Pesticides(See Also Names of Pesticides)

BT PesticidesInput Wells

USE Injection WellsInput-output Analysis

RT Economic Aspects Systems Analysis

Insect BehaviorBT Behavior

Insect Control Insecticides

BT PesticidesInsects(See Also Names of Insects)

UF EphemeropteraFlies

NT Aquatic Insects

Inspection Installation Institutional Constraints

UF Constraints RT Legal. Aspects

InstitutionsRT Organizations

Research FacilitiesInstream Aeration

BT AerationInstream Flow

BT FlowInsular Slopes

BT SlopesRT Continental Slope

Insulated StreamsBT Streams

InsulationRT Cold Resistance

Electrical Equipment Protection

InsuranceRT Economic Aspects

Intake GatesBT Gates

IntakesRT Orifices

Intangible BenefitsUSE Benefits

Interagency CooperationBT Governmental Interrelations

Interbasin TransfersBT Water Transfer

Intercepting ChannelsBT Channels

Intercepting DitchesBT Ditches

InterceptionRT Water Loss

Interception Loss Interceptor Sewers

BT SewersInterdisciplinary Studies Interest Rates

RT Economic AspectsInterfaces

NT Air-earth Interfaces Air-water Interfaces Earth-water Interfaces Ice-water Interfaces Mud-water Interfaces Oil-water Interfaces

Saline-freshwater Interfaces Sediment-water Interfaces

Interferometry Intermediate Water

BT WaterRT Deep Water

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 33

Intermittent Filters (Cont.) WATER RESOURCES THESAURUS

Intermittent FiltersBT Filters

Wastewater TreatmentIntermittent Lakes

BT LakesRT Ephemeral Lakes

Intermittent SpringsBT Springs

Intermittent Streams11 F Seasonal Streams

Temporary Streams BT Streams RT Ephemeral Streams

WadiInternal Water

BT WaterInternal Waves

BT WavesInternational Agreements International Commissions

R T OrganizationsInternational Hydrological Decade International Law

RT Legal AspectsInternational Waters

BT WaterInterrupted Streams

BT Streams Interrupted Water Table

BT Water Table Interstate Commissions

R T Organizations

Interstate Compacts Interstate Rivers

BT Rivers

IntersticeRT Void Space

Interstitial IceUF Subsurface Ice BT Ice

Interstitial WaterUF Pore WaterBT WaterRT Connate Water

Intertidal AreasRT Littoral Environment

Littoral Zone

InundationUSE Flooding

Inventories USE Surveys

Invertebrates(See Also Names of Invertebrates) Inverted Capacity

BT Capacity

Inverted WellsBT Wells

InvestmentRT Economic Aspects

Iodides Iodine

BT Halogens Iodine Radioisotopes

BT RadioisotopesIon Exchange

NT Anion Exchange Cation Exchange

Ion Exchange ResinsUSE Resins

Ion Transport Ion-selective Electrodes Ionic Interference lonization Ions

NT Anions . Cations

IronBT Heavy Metals

Iron BacteriaBT Bacteria

Iron CompoundsIron OxidesIron Radioisotopes

BT RadioisotopesIrradiation

RT Radiation Irrigable Area

USE Irrigable LandIrrigable Land

UF Irrigable Area Irrigation

NT Basin Irrigation Border Irrigation Broad Irrigation Check Irrigation Contour Irrigation Direct Irrigation Drip Irrigation Flood Irrigation Furrow Irrigation Groundwater Irrigation Mist Irrigation Spray Irrigation Sprinkler Irrigation Subsurface Irrigation Supplemental Irrigation Surface Irrigation Trickle Irrigation Wastewater Irrigation

RT Sprinkling

Irrigation CanalsBT Canals

Irrigation Design Irrigation Districts Irrigation Ditches

BT Ditches

Irrigation EffectsRT Environmental Effects

Irrigation Efficiency Irrigation Engineering

BT EngineeringIrrigation Operation Irrigation Permits

BT PermitsIrrigation Potential

USE Water PotentialsIrrigation Practices Irrigation Programs Irrigation Requirements

RT Water RequirementsIrrigation Water

BT Water Irrigation Wells

BT Wells Irrigation-return Flow

BT Flow Isohyets

RT PrecipitationIsolation Isopods

BT CrustaceansIsotherms

RT Temperature Gradient Thermocline

Isotope Fractionation Isotope Studies

R T RadioisotopesIsotopic Tracers

BT Tracers Isotropy

Jelly FishBT Coelenterates

JetsRT Nozzles

PlumesJetsam

RT Aquatic Drift

JettiesR T Breakwaters

Groins

JettingRT Well Casings

JointsUSE Construction Joints

Judicial DecisionsNT Decision Making RT Administrative Decisions

Legal Aspects

34 BT (broader term); NT (narrower term): RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Land Rights

Juniper Trees Jurisdiction

NT State Jurisdiction RT Legal Aspects

Juvenile Growth StageBT Growth Stages

Juvenile WaterBT WaterRT Magmatic Water

KKaolinite

BT Soil Types

KarstAT Sinks

Karst HydrologyBT Hydrology

KelpsUF Laminaria BT Phaeophyta

Kidneys Killifish

UF Fundulus BT Fish

Kinematic ViscosityBT Viscosity

Kinematic Wave TheoryRT Glaciers

Mathematical StudiesKinematic Waves

BT Waves Kinetic EnergyRT Kinetics

MetabolismKinetics

AT Growth Kinetics Pesticide Kinetics

RT Kinetic EnergyKjeldabJ Procedure Klebsiella

BT Bacteria

Knoll SpringsBT Springs

Kraft Mill WastesUSE Pulp Wastes

Kraft MillsBT Mills

Pulp and Paper Industry RT Pulp Wastes

Krypton RadioisotopesBT Radioisotopes

LaborRT Personnel Management

Labor UnionsRT Organizations

LaboratoriesBT Research Facilities

Laboratory Animals Laboratory Equipment Lactobacillus

BT BacteriaLagoons

NT Aerated Lagoons Anaerobic Lagoons Farm Lagoons Oxidation Lagoons Sludge Lagoons Stabilization Lagoons Wastewater Lagoons

R 7* PondsLake Basins

BT Basins Lake Beds

RT PlayasSubmerged Beds

Lake Bottom SpringsBT Springs

Lake BreezesBT Wind

Lake CirculationUSE Water Circulation

Lake ClassificationBT Classification

Lake EvaporationBT Evaporation

Lake FisheriesBT Fisheries

Lake IceBT Ice

Lake MorphologyBT Morphology RT Limnology

Lake MorphometryRT Limnology

Lake RehabilitationUSE Lake Restoration

Rehabilitation

Lake RestorationUF Lake Rehabilitation RT Destratification

Rehabilitation

Lake SedimentsBT Sediments

Lake ShoresBT Shores

Lake SoilsUSE Aquatic Soils

Lake StagesRT Limnology

LakesNT Artificial Lakes

Closed Lakes Dystrophic Lakes Ephemeral Lakes Eutrophic Lakes Evanescent Lakes Glacial Lakes Holomictic Lakes Iced Lakes Intermittent Lakes Meromictic Lakes Mesotrophic Lakes Mountain Lakes Oligotrophic Lakes Oxbow Lakes Playas Saline Lakes Strip Mine Lakes

Laminar FlowUF Sheet FlowBT FlowNT Viscous Flow

Laminaria USE Kelps

LampreyBT Fish

Land Acquisition Land Application

USE Land Disposal Land Appraisals

UF Land ValuesRT Economic Aspects

Land ClassificationBT Classification

Land Gearing Land Development Land Disposal

UF Land Application Land Spreading Land Treatment

RT Broad IrrigationSoil Disposal Fields Spray Irrigation

Waste Disposal Wastewater Disposal

Land FormingAT Terracing

Land Management Land Ownership

USE Land Tenure Land Reclamation

UF ReclamationLand Resources

RT Natural Resources

Land RightsRT Easements

Land SpreadingUSE Land Disposal

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 35

WATER RESOURCES THESAURUS

Land TenureUF Land Ownership RT Legal Aspects

Land TreatmentUSE Land Disposal

Land UseUF Land Use Control

Land Use Planning RT Zoning

Land Use ControlUSE Land Use

Land Use PlanningUSE Land Use

Land Values USE Land Appraisals

LandfillsAT Sanitary Landfills RT Garbage Dumps

Waste DumpsLandscaping

NT Highway Beautification RT Aesthetics

OrnamentalsLandslides

RT Avalanches Erosion

Mass WastingLaplace Equation Large Watersheds

BT Watersheds Largemouth Bass

USE Bass Larvae Larval Growth Stage

BT Growth Stages Larvicides

BT Pesticides LAS

USE Linear Alkyl Sulfonates Lasers Late Impoundment

BT Reservoir StagesLatent Heat

BT HeatLateral Conveyance Structures

USE Conveyance StructuresLateral Sewers

BT SewersLaterites

BT Soil TypesLatitudinal Studies Laundering

RT Wash WaterLavaRT Crystalline Rocks

Law EnforcementRT Legal Aspects

Police PowerLaw of the Sea

RT Legal Aspects LawnsRT Grasses

Turf GrassesLeachates

R T -Infiltration Percolation

Soil SolutionLeachingRT Infiltration

PercolationLead

BT Heavy MetalsLead Radioisotopes

BT Radioisotopes Leaf Water Potential

USE LeavesWater Potentials

LeakageRT Water Loss

Leaky AquifersBT Aquifers

Leaky BoundariesBT Boundaries

LeasesRT Legal Aspects

Least Squares MethodRT Mathematical Studies

LeavesUF Leaf Water PotentialNT StomataRT Plant Tissues

Legal AspectsUF Claims

Statutes R T Accretion

Adjudication ProcedureAdverse PossessionAppropriationAssessmentsBoundary DisputesBuilding CodesCivil LawCommon LawCondemnationConstitutional LawContractsEasementsEminent DomainEquitable ApportionmentInjunctionsInjunctive ReliefInstitutional ConstraintsInternational Law

Judicial Decisions Jurisdiction

Land Tenure Law Enforcement Law of the Sea Leases

LiabilityLicensesLicensingNatural Flow DoctrineNegligenceNuisanceOrdinancesOverlying ProprietorOwnership of BedsPatents

PermitsPolitical Constraints Prescriptive Rights Property Boundaries Proprietary Power Public Access Public Rights

Regulations Relative Rights Remedies RepulsionReservation Doctrine Riddance Right-of-way Riparian Land Riparian Rights Riparian Waters Sovereign Immunity State Jurisdiction Torts Treaties TrespassUsufructuary Right Water Law Water Rights

ZoningLegal Review Legislation Legumes Lemna

USE Aquatic Plants Duckweed

Lentic EnvironmentBT Environment RT Standing Waters

Leontief ModelsBT Model Studies

Lepomis USE Bluegills

Lethal LimitRT Median Tolerance Limit

Mortality Water Pollution Effects

Lettuce Levees

BT Earthworks NT Natural Levees RT Dams

DikesEmbankments

LiabilityRT Legal Aspects

LibrariesRT Information Exchange

36 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Maintenance Costs

Information Retrieval Information Systems

LicensesRT Legal Aspects

LicensingRT Legal Aspects

LichensLife CyclesLife History Studies

RT Phenology Light Intensity

R T RadiationLight Penetration

RT Opacity Light QualityRT Radiation

LighthousesRT Navigation

Lighting Lightning

RT Thunderstorms Lightweight Aggregates

BT Aggregates

Lignite LimeLimestone Limiting Factors

RT Inhibitors

Limiting NutrientsBT Nutrients

LimnologyNT Paleolimnology RT Lake Morphology

Lake MorphometryLake Stages

LindaneLinear Alkyl Sulfonates

UF LAS BT Sulfonates

Linear ProgrammingRT Systems Analysis

LiningsNT Canal Linings

Ditch Linings Reservoir Linings Tunnel Linings

RT Coatings Paving

LipidsLiquefaction Liquid Limits Liquid Sludge

BT Sludge Liquid Wastes

BT WastesRT Industrial Wastes

Listing BasinsBT Basins

Literature ReviewBT Reviews

Unificationfir Sedimentation

Lithium Lithologic Logs Litter

UF Forest Litter BT Organic Matter

Littoral DriftRT Aquatic Drift

Littoral EnvironmentRT Intertidal Areas

Littoral ZoneBT ZonesRT Intertidal Areas

LittorinaUSE Gastropods

Live StreamsUSE Perennial Streams

Liver Livestock

RT Domestic AnimalsLoad Distribution

UF Loading Rate RT Pressure Distribution

Shock LoadsLoading Rate

USE Load DistributionLoam

BT Soil Types Loans

RT Economic Aspects Lobsters

BT Crustaceans Local Governments

RT Organizations Local Precipitation

BT Precipitation Locks

R T GatesNavigation

LoessBT Soil Types

LoggingBT Forest ManagementNT Clear-cuttingRT Lumber

Logging (Recording)UF Neutron Logging NT Core Logging

Electrical Well Logging.Radioactive Well Logging

RT Drillers LogsSurface Water RecordsWell Logs

Long-term PlanningBT Planning

Longshore CurrentsBT Water Currents

Loop LakesUSE Oxbow Lakes

Losing StreamsUSE Influent Streams

Lotic Environment BT Environment RT Running Waters

Low FlowBT Flow

Low Water MarkR T Water Level Fluctuations

Low-flow AugmentationRT Flow Control

LubricantsBT Petroleum Products RT Oil

LumberRT Hardwood

Logging Softwood

Lumber IndustryR T Industrial Plants

LysimetersBT Moisture Meters

MMacroinvertebrates(See Also Names of Macroinvertebrates)Macrophytes(See Also Names of Macrophytes)Magmatic Water

BT WaterRT Juvenile Water

Plutonic Water

Magnesium Magnesium Carbonate Magnesium Compounds Magnesium Hydroxide Magnetic Studies

RT Geophysics Main Sewers

UF Trunk Sewer BT Sewers

MaintenanceUF Repairing

Maintenance CostsBT Costs

MaizeUSE Corn

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 37

Malathion (Cont.) WATER RESOURCES THESAURUS

Malathion Malenclaves

BT GroundwaterMammals(See Also Names of Mammals)

AT Rodents Ruminants

Management PlanningBT Planning

ManganeseBT Heavy Metals

Manganese RadioisotopesBT Radioisotopes

Mangrove SwampsBT Swamps

Mannings Equation Manometers

BT Pressure-measuring Instruments RT Warburg Respirometry

ManpowerRT Personnel

Manufacturing Wastes USE Industrial Wastes

ManureBT Farm Wastes RT Fertilizers

Maple TreesUF Acer

MappingNT Geologic Mapping

Subsurface Mapping Topographic Mapping

MapsUF AtlasesAT Hydrologic Maps

Marginal Benefits USE Benefits

Marginal CostsBT Costs

Mariculture USE Aquaculture

MarinasBT Recreation Facilities

Marine Algae(See Also Names of Algae)

BT AlgaeAquatic Plants

RT Marine PlantsMarine Animals(See Also Names of Animals)

BT Aquatic Animals

Marine BacteriaBT BacteriaRT Marine Plants

Marine BiologyUF Biological Oceanography RT Oceanography

Marine ClimatesUF Ocean Climates BT Climates

Marine EnvironmentBT Environment

Marine FisheriesBT Fisheries

Marine GeologyBT Geology

Marine PlantsBT Aquatic Plants RT Marine Algae

Marine BacteriaMarsh Plants

Marine ResourcesRT Natural Resources

Resources DevelopmentMarine Sediments

BT SedimentsMarket Value

UF Present Value BT Value

MarketingRT Economic Aspects

Marking Techniques Markov Process

RT Mathematical StudiesMarl

R T Sediments Marsh Management Marsh Plants

BT Aquatic Plants RT Marine Plants

MarshesBT WetlandsAT Coastal Marshes

Salt MarshesTidal Marshes

RT Bogs Swamps

Mass ConcreteBT Concretes

Mass Spectra Mass Spectrometry Mass Transfer Mass Wasting

RT Avalanches Erosion

Landslides Mudflows Roc ksl ides

Materials EngineeringBT Engineering

Materials Testing Mathematical Analysis Mathematical Equations(See Also Names of Equations)

Mathematical ModelsBT Model Studies

Mathematical StudiesRT Algorithms

Analysis of Variance Approximation Method Correlation Analysis Differential Equations Factor Analysis Finite Difference Methods Finite Element Method Fourier Analysis Frequency Analysts Graphical Analysis Graphical Methods Kinematic Wave Theory Least Squares Method Markov Process Monte Carlo Method Most Probable Number Test Multivariate Analysis Numerical Analysis Poisson Ratio Probabilistic Process Quantitative Analysis Rational Formula Regression Analysis Relaxation Method Simulation Analysis Stability Analysis Standard Deviation Statistical Analysis Statistical Methods Statistical Models StatisticsStochastic Process Systems Analysis Time Series Analysis

Mature Growth StageBT Growth Stages

Mature RiversBT Rivers

Maximum Available WaterBT Available Water RT Field Capacity

Maximum FlowBT Flow

Maximum Probable FloodsBT Design Floods

Flood PeakMayflies

UF CaenisBT Aquatic Insects

MeadowsRT Grasslands

Pastures Prairies

Meander Belt Meanders

RT Oxbow Lakes

Measuring Instruments(See Also Names of Instruments)

38 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Mineral Springs

Meat Processing IndustryR T Industrial Plants

Mechanical ControlRT Physical Control

Mechanical EngineeringBT Engineering

Mechanical Equipment Mechanical Failure

NT Buckling Collapse Cracks Rupturing

Median Tolerance LimitRT Lethal Limit

StressWater Pollution Effects

MedicagoUSE Alfalfa

Medicinal SpringsBT Springs

MelosiraBT Diatoms

Melt WaterUSE Snowmelt

Melting Membrane Electrodes

USE Electrodes Membrane Filters

BT Filters Membrane Fouling

USE Membrane Processes Membrane Processes

UF Membrane Fouling NT Dialysis

Electro-osmosisElectrodialysisOsmosisReverse Osmosis

MembranesNT Biological Membranes

Cellulose Acetate Membranes Impervious Membranes Permselective Membranes Semi permeable Membranes

MenhadenBT Fish

Mercenaria USE Clams

MercuryBT Heavy Metals

Meromictic LakesBT LakesRT Holomictic Lakes

MeromixisRT Mixing

Stratification Water Circulation

MesophytesRT Hydrophytes

Mesotrophic LakesBT LakesRT Oligotrophic Lakes

MesotrophyBT Trophic Level

Mesozoic EraBT Geologic Time

MesquiteBT Phreatophytes

MetabolismRT Biosynthesis

Biotransformation Kinetic Energy

MetabolitesRT Byproducts

Degradation ProductsMetal Chelates

USE Chelating AgentsMetal Complexes

BT MetalsMetal Organic Pesticides

BT Organic PesticidesMetal Pipes

USE Pipes Metal-finishing Wastes

UF Plating Wastes BT Industrial Wastes.

Metallurgy Metals(See Also Names of Metals)

NT Alkali MetalsAlkaline Earth Metals

Heavy Metals Metal Complexes Trace Metals

RT CastingsMetamorphic Rocks

BT RocksRT Crystalline Rocks

Metamorphic WaterBT Water

Meteoric WaterBT Water

Meteorological Data CollectionBT Data Collections

Methane Methane Bacteria

BT Bacteria Methanol Methoxychlor Methylation Methylmercury Metropolitan Areas

USE Urban Areas

Metropolitan Water ManagementBT Water Management

MiceMicrobial Degradation

BT BiodegradationMicrobiological StudiesMicroclimateMicroclimatology

BT ClimatologyRT Micrometeorology

MicrocystisBT Cyanophyta

MicroenvironmentBT Environment

MicrometeorologyRT Microclimatology

Microorganisms(See Also. Names of Microorganisms) Micropterus

USE BassMicroscopic Analysis

BT Water AnalysisMicroscopy

NT Electron MicroscopyMicrowaves

BT RadiationMidges

UF Chironomids Migration

NT Fish Migration RT Ecology

MildewsRT Fungi

MilkRT Dairy Industry

Mill DamsBT Dams

MillsUF Board Mills BT Industrial Plants NT Kraft Mills

Saw MillsMine Acids

USE Acid Mine DrainageMine Drainage

UF Mine WaterBT DrainageAT Acid Mine Drainage

Mine WastesUF Coal Mine Wastes

TailingsBT Industrial Wastes RT Spoil Banks

Strip Mine WastesMine Water

USE Mine DrainageMineral IndustryRT Industrial Plants

Mineral SpringsBT Springs

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 39

Mineral Water (Cont.) WATER RESOURCES THESAURUS

Mineral WaterBT Water

Mineralization Mineralogy

NT Crystallography Minerals Minimum Flow

BT Flow Mining

USE Coal Mining Mining Engineering

UF ShaftsBT Engineering

MinkMistMist Irrigation

BT Irrigation Mites Miticides

BT PesticidesMixed Forests

BT Forests Mixed Liquor Solids

BT Solids

MixingRT Destratiflcalion

MeromixisMixolimnion

RT ChemoclineMonimolimmon

Mode of Action Model Studies

UF Deterministic Models Hele-Shaw Models Stochastic Models Watershed Models

NT Analog Models Computer Models Hydraulic Models

Hydrologic Models Leontief Models. Mathematical Models Statistical Models Structural Models

Model Testing Mohr Circle Mohr Envelope Mohr Failure Theory Moisture

RT Humidity Moisture Availability

RT Available WaterGroundwater Availability

Moisture Content Moisture Deficiency

AT Soil Moisture Deficiency RT Drought

Water Shortage

Moisture DensityBT Density

Moisture Equivalent Moisture Gradient

RT Rainfall PenetrationMoisture Index Moisture Meters

NT Infiltrometers Lysimeters Moisture Probe Nuclear Moisture Meters Soil Moisture Meters

Moisture ProbeBT Moisture Meters

Moisture ProfilesBT Profiles

Moisture StressBT Stress

Moisture TensionUF Capillary Tension

Soil-moisture TensionMoisture Uptake Molds

BT FungiMole Drainage

BT DrainageMolecular Structure

UF Chemical StructureMolluscicides

BT PesticidesMollusks

UF BivalvesBT Aquatic AnimalsAT Abalone

ClamsGastropods

MusselsOystersSnails

MolybdenumBT Heavy Metals

Momentum Equation Momentum TransferMonetary Benefits

USE Benefits

Monetary ReturnsRT Economic Aspects

MonimolimnionRT Mixolimnion

Monitoring Monomolecular Films

BT Thin Films Monopoly

RT Economic AspectsMonsoons

BT Wind

Monte Carlo MethodRT Mathematical Studies

Monthly DistributionBT Distribution

MontmorilloniteMonuronMoraines

RT Glacial Drift Morbidity Morphology

JVT Channel Morphology Lake Morphology Plant Morphology

MortalityRT Lethal Limit

Mortar RT Cements

MortlakesUSE Oxbow Lakes

MosquitoesUF Aedes

AnophelesCulex

BT Aquatic InsectsMossesMost Probable Number Test

RT Mathematical Studies Motivation

RT BehaviorMountain Lakes

BT Lakes Mountains

RT Alpine Regions Orography

Movable DamsBT Dams

Muck SoilsBT Soil Types RT Peat Soils

MudAT Aquatic Soils R T Sediments

Mud FlatsNT- Sandbars

ShoalsTidal Flats

Mud Springs BT Springs

Mud WaveRT Mudflows

Mud-water InterfacesUF Water-mud Interfaces BT Interfaces RT Earth-water Interfaces

Sediment-water InterfacesMudflows

R T ErosionMass Wasting Mud Wave

Mugil USE Mullet

40 BT (broader term); NT (narrower term); RT (related term); UF (used for): (terms which have further subsets)

THESAURUS OF DESCRIPTORS Nickel

MulchesRT Straw

Mulching Mullet

UF Mugil BT Fish

Multieffect DistillationBT Distillation

Multiobjective PlanningBT Planning

Multiphase FlowUF Two-phase Flow BT Flow

Multiple Arch DamsBT Dams

Multipurpose Projects RT Dual Purpose Plants

Multipurpose ReservoirsUF Multiuse Reservoirs BT Reservoirs

Multireseryoir NetworksBT Networks RT Reservoirs

Multistage Flash DistillationBT Flash Distillation

Multiuse Reservoirs USE Multipurpose Reservoirs

Multivariate AnalysisRT Mathematical Studies

Municipal WastesRT Domestic Wastes

Industrial Wastes Solid Wastes

Municipal WastewaterBT Wastewater

Municipal WaterBT Water

Muscle Muskeg

BT BogsWetlands

RT SwampsMuskrats

BT Rodents Mussels

BT Mollusks NT Mytilus

MycobacteriumBT Bacteria

Myriophyllum Mytilus

BT MusselsMyxobacteria

BT Bacteria

NNansen Bottles National Parks

BT ParksNational Resource Development

USE Resources DevelopmentNative Water

USE Connate WaterNatural Flow

BT FlowNatural Flow Doctrine

RT Legal AspectsNatural Gas

BT FuelNatural Levees

BT Levees Natural Purification

USE Self-purificationNatural Recharge

BT RechargeRT Turnover Time

Natural ResourcesAT Geothermal Resources RT Land Resources

Marine Resources Resources Development

Natural SlopeBT Slopes

Natural StreamsBT Streams

Natural UseBT Water Use

Natural Water TableBT Water Table

Natural WatercoursesBT Watercourses

Natural WatersBT Water

Natural WellsBT Wells

Naval ArchitectureBT Architecture

NaviculaUSE Diatoms

Navigable RiversBT RiversRT Inland Waterways

WaterwaysNavigable Waters

BT Water RT Waterways

NavigationUF Navigation Servitude RT Buoys

Channel ImprovementLighthouses

Locks Transportation

Navigation CanalsBT Canals

Navigation ObstructionsUF Obstructions to Navigation

Navigation ServitudeUSE Navigation

Neap Tides BT Tides

Nearshore Processes Needle Dams

BT DamsNeedle Ice

USE Frazil IceNegative Wells

BT WellsRT Dead Wells

NegligenceRT Legal Aspects

NegotiationsRT Communication

RemediesNematodes

RT Aquatic AnimalsNeritic Environment

BT EnvironmentNestingRT Ecology

Net RadiationBT Radiation

Net RainfallBT RainfallRT Effective Precipitation

Excess RainfallNets

AT Flow Nets Fyke Nets Gill Nets Plankton Nets

Network Design Networks

AT Electrical NetworksMultireservoir Networks Resistance Networks

NeutralizationRT Equilibrium

Neutron Absorption Neutron Activation Analysis Neutron Logging

USE Logging (Recording)New Snow

BT SnowNiches

RT Ecology Nickel

BT Heavy Metals

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 41

Nickel (Cont.) WATER RESOURCES THESAURUS

Nitella USE Aquatic Plants

Nitrates Nitrification Nitrilotriacetic Acid

UF NTANitritesNitrogenNitrogen Compounds

UF Organic NitrogenNitrogen Cycle Nitrogen Fixation Nitrogen Fixing Bacteria

BT BacteriaNitrogen Removal

RT Denitnfication

NitzschiaBT Diatoms

Noise Nonconsumptive Use

BT Water UseNondestructive Tests Nonionic Surfactants

BT SurfactantsNonlinear Programming

RT Computer Programs Systems Analysis

Nonhavigable WatersBT Water

Nonnewtonian FlowBT Flow

RheologyNonperennial Streams

BT Streams Nonpoint Pollution Sources

RT Pollution Load Nonstructural Alternatives

BT PlanningNontidal Currents

BT Water Currents Nonuniform Flow

BT Flow

NostocBT Cyanophyta

NotropisUSE Shiner

NozzlesRT Jets

NTA USE Nitrilotriacetic Acid

Nuclear EnergyRT Electric Power Production

Nuclear EngineeringBT Engineering

Nuclear ExplosionsBT Explosions

RT Rapid ExcavationNuclear Magnetic Resonance Nuclear Meters

NT Nuclear Moisture Meters Nuclear Moisture Meters

BT Moisture Meters Nuclear Meters

Nuclear Physics Nuclear Powerplants

BT PowerplantsRT Fuel Reprocessing

Nuclear ReactorsNT Boiling Water Reactors

Breeder Reactors Pressurized Water Reactors

Nuclear WastesUSE Radioactive Wastes

NucleationRT Chemistry of Precipitation

NuisanceRT Legal Aspects

Nuisance AlgaeBT Algae RT Weeds

Numerical AnalysisRT Mathematical Studies

Nutrient Removal Nutrient Requirements Nutrients

/V7" Cycling Nutrients Deficient Elements Essential Nutrients Limiting Nutrients

NutritionRT Diets

FoodsNuts

OOak Trees

UF Quercus

OatsObjective FunctionObservation Wells

BT Wells Obstruction to Flow

UF Flow Obstruction RT Groundwater Barriers

Obstructions to Navigation USE Navigation Obstructions

OccupationsRT Employment

Ocean BottomRT Benthic Environment

Ocean CirculationRT Upwelling

Water Circulation Ocean Climates

USE Marine ClimatesOcean Currents

USE Water Currents Ocean Disposal

USE Ocean Dumping Ocean Dumping

UF Ocean DisposalRT Dredging

Spoil Banks Waste Disposal

Ocean WavesBT Waves

OceanographyRT Marine Biology

OchromonasBT Chrysophyta

Odor Control Odor-producing Algae

BT AlgaeOdors

BT Organoleptic Properties

Offshore Platforms Oil

UF Bunker OilCrude OilFuel Oil

/?r-FuelLubricants

Petroleum Products

Oil Characterization Oil Fields Oil Industry

UF Petroleum Industry NT Oil Refineries RT Industrial Plants

Oil PollutionRT Oily Water

Oil RecoveryNT Secondary Oil Recovery RT Cleanup Operations

Oil Skimmers

Oil RefineriesBT Industrial Plants

Oil Industry

Oil ReservoirsR T Reservoirs

Oil ShaleBT Shales

Oil SkimmersRT Oil Recovery

Oil Slicks Oil Spills

RT Cleanup Operations Dispersants

Oil TankersRT Ships

42 BT (broader term); NT (narrower term): RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Overdraft

Oil WastesBT Industrial Wastes

Oil WellsBT Wells

Oil-water InterfacesUF Water-oil Interfaces BT Interfaces

Oilseed Crops Oily Water

RT Oil PollutionOld Snow

BT SnowOUgochaetes

BT Annelids AT Tubificids

Oligotrophic LakesBT LakesRT Dystrophic Lakes

Eutrophic Lakes Mesotrophic Lakes

OligotrophyBT Trophic Level

On-site Data CollectionsBT Data Collections

On-site InvestigationsUF On-site Laboratories R T Sites

On-site LaboratoriesUSE On-site Investigations

On-site TestsRT Field Tests

OncorhynchusUSE Salmon

Onions Ooze

RT Aquatic Soils

OpacityBT Optical PropertiesRT Light Penetration

Secchi DisksOpen Channels

BT Channels R T Canals

DitchesOpen Space

RT Wilderness AreasOpen Wells

BT WellsOpen-channel Drainage

BT DrainageOpen-channel Flow

BT Flow Operating Costs

BT Costs

Operating PoliciesRT Administration

Public Policy

Operation WastesBT Wastes

Opportunity CostsUSE Costs

Optical PropertiesBT Water Properties NT Color

OpacityPolarityReflectanceRefractivityTransparency

Optimal YieldBT Yield

OptimizationRT Systems Analysis

Optimum Development PlansRT Planning

Resources DevelopmentOrchardgrassOrchardsOrdinances

RT Legal AspectsOrganic Acids

BT Acids Organic Carbon

UF Total Organic CarbonBT Carbon

Organic Compounds Organic Loading

RT Waste LoadOrganic Matter

AT Decomposing Organic Matter Detritus Litter Soil Organic Matter

Organic NitrogenUSE Nitrogen Compounds

Organic PesticidesBT PesticidesNT Metal Organic Pesticides

Organic SoilsBT Soil Types RT Peat Soils

Soil Organic MatterOrganic Solvents

BT SolventsOrganic Wastes

BT Wastes RT Farm Wastes

OrganizationsRT Administrative Agencies

Cooperatives InstitutionsInternational Commissions Interstate Commissions Labor Unions Local Governments Professional Societies Technical Societies

Trade AssociationsUnited NationsWater Resources Institutes

Organoleptic PropertiesBT Water Properties AT Odors

TasteOrganophosphorus Compounds Organophosphorus Pesticides

BT Pesticides Orifice Flow

BT FlowOrifices

RT Intakes Outlets Pores

OrnamentalsRT Landscaping

Orographic PrecipitationBT Precipitation

OrographyBT Geography RT Alpine Regions

MountainsOrthophosphates Oscillatoria

BT CyanophytaOscillatory Waves

BT WavesOsmosis

BT Membrane ProcessesOsmotic Pressure

RT Salt Balance Ostracods

BT CrustaceansOttersOuedd

USE WadiOutdoor Recreation

USE Recreation Outer Banks

USE Barrier IslandsOutfall

AT Outfall SewersWastewater Outfall

Outfall SewersBT Outfall

SewersOutlet Channels

BT ChannelsOutlets

RT Orifices Outwash

RT Glacial DriftOverburden

RT SedimentsOverdraft

BT Water Use

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 43

Overfalls (Cont.) WATER RESOURCES THESAURUS

OverfallsUSE Spillways

OverflowNT Combined Sewer Overflows

Overflow ChannelsUF Spillway Channels BT Channels

Overland FlowBT Flow RT Channel Flow

StreamflowOverlying Proprietor

RT Legal Aspects Ownership of Beds

RT Legal AspectsOxbow Lakes

UF Crescentic LakesCutoff LakesHorseshoe LakesLoop LakesMortlakes

BT Lakes RT Meanders

OxidationUF Chemical Oxidation

Photooxidation NT Biological Oxidation

Wastewater Oxidation RT Aeration

Wet Oxidation ProcessOxidation Ditches

BT DitchesOxidation Lagoons

BT Lagoons Oxidation Ponds

BT PondsOxidation Process

BT Wastewater TreatmentOxidation-reduction PotentialOxidesOxidized Wastewater

BT Wastewater

OxygenUF Photosynthetic Oxygen NT Dissolved Oxygen

Residual OxygenOxygen BalanceOxygen Consumption

USE Oxygen RequirementsOxygen Deficit Oxygen Demand

UF Total Oxygen Demand NT Biological Oxygen Demand

Chemical Oxygen DemandOxygen Depletion

BT DepletionOxygen Isotopes Oxygen Requirements

UF Oxygen Consumption

Oxygen Sag Oxygen Transfer Oxygen Uptake Oxygenadon Oysters

UF Crassostrea BT Mollusks

OzonationBT Water Treatment

Ozone

Packed BedsBT Filters

PaleoclimatologyBT Climatology

PaleohydrologyBT Hydrology

PaleolimnologyBT Limnology

PaleosolsBT Soil Types

Paleozoic EraBT Geologic Time

PalynologyRT Pollen

Pan EvaporationBT Evaporation

Paper IndustryUSE Pulp and Paper Industry

Paper MachinesUSE Pulp and Paper Industry

Parametric HydrologyBT Hydrology RT Stochastic Hydrology

Synthetic HydrologyParaquat Parasites Parasitism

RT Pathology

Parathion Pareto OptimalityParks

BT Recreation Facilities NT National Parks RT Public Lands

Partial DiversionBT Diversion

Partially Penetrating WellsBT Wells

Participating FundsRT Economic Aspects

Particle ShapeBT Shape

Particle SizeUF Grain Size

Participate Matter Pasture Management Pastures

RT Grasslands Meadows

PatentsRT Legal Aspects

Path of PollutantsRT Fate of Pollutants

Pathogenic BacteriaBT Bacteria

Pathogenic FungiBT Fungi

Pathogens Pathology

AT Animal Pathology Human Pathology Plant Pathology

RT Diseases Infection Parasitism

PavingR T Linings

RoadsPayment

RT Economic AspectsPeaches Peak Demand Peak Discharge

USE Flood Peak

Peak FlowUSE Flood Peak

Peak Loads Peaking Capacity

BT CapacityPeanuts Peat Peat Bogs

BT BogsPeat Soils

BT Soil Types RT Muck Soils

Organic SoilsPellicular Water

UF Adhesive WaterFilm WaterSorption Water

BT Water RT Attached Groundwater

Funicular WaterPendular Water

Pellicular ZoneBT Zones

Penaeus USE Shrimp

44 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Photometry

Pendular WaterBT WaterRT Pellicular Water

PenstocksPeptidesPerca

USE PerchPerch

UF Perca BT Fish

Perched AquifersBT AquifersRT Perched Groundwater

Perched GroundwaterBT Groundwater RT Perched Aquifers

Perched HorizonBT Groundwater

Perched SpringsBT Springs

Perched StreamsBT Streams

Perched WaterBT Water

Perched Water TableUF Apparent Water TableBT Water Table

Percolating FiltersBT Filters

Percolating WaterBT WaterRT Groundwater Runoff

Underground StreamsPercolation

NT Deep PercolationSeeps

RT Capillarity Filtration Flow Groundwater Movement Infiltration

Leachates Leaching

Seepage Water Loss

Percolation Rate Perennial Ryegrass Perennial Springs

BT SpringsPerennial Streams

UF Live StreamsPermanent Streams

BT Streams RT Continuous Streams

Performance Evaluation Peridinium

BT DinoflagellatesPerliteRT Crystalline Rocks

PermafrostRT Frozen Ground

Permanent StreamsUSE Perennial Streams

PermeabilityUF Surface Permeability NT Fracture Permeability

Hydraulic Permeability RT Clogging

Permeability CoefficientUF Coefficient of Permeability

Hydraulic Conductivity RT Transmission Constant

Permeameters Permits

NT Fill PermitsIrrigation PermitsWater PermitsWell Permits

RT Legal AspectsPermselective Membranes

BT MembranesPersonnel

NT Engineering Personnel Professional Personnel Scientific Personnel

R T ManpowerPersonnel Management

RT Employee Relations Labor

Pervious SoilsRT Soil Compaction

Soil TypesPesticide Drift Pesticide Kinetics

BT KineticsPesticide Residues Pesticide Toxicity

BT ToxicityPesticides(See Also Names of Pesticides)

NT Acaricides Algicides Antibiotics Bactericides BiocidesCarbamate Pesticides Fumigants FungicidesHalogenated Pesticides .Herbicides Inorganic Pesticides Insecticides Larvicides Miticides Molluscicides

Organic Pesticides Organophosphorus Pesticides Phenolic Pesticides Phosphothioate Pesticides Piscicides Rodenticides

Thiocarbamate Pesticides Triazine Pesticides Urea Pesticides Viricides

RT Agricultural Chemicals Chemcontrol Repellents

PetrofabricsR T Petrology

PetrographyRT Petrology

Petroleum HydrocarbonsUSE Hydrocarbons

Petroleum IndustryUSE Oil Industry

Petroleum ProductsNT Lubricants RT Oil

PetrologyNT Sedimentary Petrology RT Petrofabrics

PetrographypH

USE Hydrogen Ion ConcentrationPhaeodactylum

USE Diatoms Phaeophyta

BT AlgaeNT Fucus

KelpsPhase Diagrams Phenolic Pesticides

BT Pesticides PhenologyRT Ecology

Life History StudiesPhenols

BT Industrial Wastes Phosphate Removal

USE Phosphorus RemovalPhosphates PhosphorusPhosphorus Compounds Phosphorus Radioisotopes

BT RadioisotopesPhosphorus Removal

UF Phosphate Removal Phosphothioate Pesticides

BT PesticidesPhotoactivationPhotogrammetryPhotography

NT Aerial PhotographyPhotometry

NT Atomic AbsorptionSpectrophotometry

Flame Photometry Spectrophotometry

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 45

Photometry (Cont.) WATER RESOURCES THESAURUS

PhotooxidationUSE Oxidation

Photoperiodism Photosynthesis Photosynthetic Bacteria

BT Bacteria Photosynthetic Oxygen

USE Oxygen Phototropism

BT Tropisms Phreatic Lines

USE Seepage Lines Phreatic Water

USE Groundwater Phreatic Waves

USE Groundwater WavesPhreatophytes

AT MesquiteSagebrushTamariskWillow TreesXerophytes

RT ChaparralConsumptive Use

PhylogenyRT Evolution

Physical AnalysisBT Water Analysis

Physical ControlRT Mechanical Control

Physical PropertiesBT Water Properties AT Acoustics

Density Structure Surface Tension Turbidity

Viscosity Water Pressure Water Temperature

RT Heat Balance Heat Budget Heat Flow Hydrostatic Pressure Hydrothermal Studies Specific Head

Physicochemical Properties Physicochemical TreatmentRT Wastewater Treatment

Water TreatmentPhysiographic Balance Physiographic Provinces Physiological Ecology

BT EcologyPhytometers Phytoplankton

BT Aquatic Plants Plankton

PhytotoxicityBT Toxicity

PiersRT Abutments

DocksPiezometers

UF PiezometryBT Pressure-measuring InstrumentsAT Piezometric HeadRT Water Level

Piezometric HeadBT Piezometers RT Driving Head

PiezometryUSE Piezometers

PigmentsUF Plant Pigments

PikeUF Esox BT Fish

PilesUF Foundation Piles RT Abutments

Rigid FoundationsPilot Plants Pine Trees

UF Pinus Pinus

USE Pine Trees Pipe Flow

BT FlowPipelines

RT Conveyance Structures Water Mains

PipesUF Concrete Pipes

Metal PipesPlastic PipesSteel Pipes

BT Water Transport RT Aqueducts

Conveyance StructuresPlumbing

PiscicidesBT Pesticides

Pit RechargeBT Recharge

PittingUSE Corrosion

Placer MiningRT Hydraulic Mining

Plaice USE Rounders

Plane FlowBT Row

PlanktonBT Aquatic Life AT Phytoplankton

Zooplankton RT Aquatic Drift

Plankton NetsBT Nets

PlanningAT Alternative Planning

Comprehensive Planning Future Planning Long-term Planning Management Planning Multiobjective Planning Nonstructural Alternatives Project Planning Regional Planning Short-term Planning Urban Planning

RT Area RedevelopmentCoastal Zone ManagementIndustrial DevelopmentOptimum Development PlansProjectionsRegional DevelopmentScheduling .

Plant Communities USE Plant Populations

Plant DiseasesBT Diseases

Plant FibersRT Fiber Crops

Plant GrowthRT Vegetation Regrowth

Plant Growth Substances Plant Morphology

BT Morphology Plant Pathology

BT Pathology Plant PhysiologyPlant Pigments

USE PigmentsPlant Populations

UF Plant Communities BT Populations RT Flora

Plant TissuesRT Epidermis

Leaves Vascular Tissues

Plant VirusesBT Viruses

Plant Water PotentialBT Water Potentials

Planting ManagementPlastic Pipes

USE PipesPlasticity

R T Elastic Properties Rexibility

PlasticsRT Polymers

Plating WastesUSE Metal-finishing Wastes

PlatyhelminthesUF FlatwormsRT Aquatic Animals

46 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Poultry

PlayasUF Dry LakesBT LakesRT Alkali Flats

Lake BedsSalt FlatsSalt Pans

Plerotic GroundwaterBT Groundwater

Plerotic WaterBT Water

Plug FlowBT Flow

PlumbingRT Pipes

PlumesUF Thermal PlumesRT Jets

Plutonic WaterBT WaterRT Magmatic Water

Plutonium Pocket Springs

BT Springs Pocket Storage

USE Depression StoragePodzols

BT Soil Types

Poised RiversUSE Poised Streams

Poised StreamsUF Poised RiversBT StreamsRT Graded Streams

PoisonsRT Hazardous Materials

Toxicity Toxins

Poisson RatioRT Mathematical Studies

Polar RegionsNT Antarctic

Arctic RT Cold Regions

PolarityBT Optical Properties

Polarization Polarographic Analysis Polders Police Power

RT Law Enforcement Policy Makjng

BT Administrative DecisionsRT Public Policy

Political AspectsRT Federal Jurisdiction

Governmental InterrelationsPolitical Constraints

RT Legal Aspects

PollenRT Palynology

Pollutant IdentificationRT Bioindicators

Pollutants(See Also Names of Pollutants)

UF ContaminantsPollution Abatement

USE Water Pollution ControlPollution Control

USE Water Pollution Control Pollution Effects

USE Air Pollution Effects Ecological Effects Environmental Effects Water Pollution Effects

Pollution Index Pollution Load

RT Environmental Protection Nonpoint Pollution Sources Population Exposure Sublethal Effects

Pollution PreventionUSE Water Pollution Control

Water Pollution PreventionPollution Sources

USE Water Pollution Sources

Pollution TaxesBT TaxesRT Effluent Charges

PolychaetesBT Annelids

Polychlorinated BiphenylsNT Aroclors

PolyelectrolytesBT Electrolytes

PolymersRT Plastics

Pondage Ponded Streams

BT StreamsPonding Ponds

NT Catfish PondsCooling PondsFarm PondsFish PondsOxidation PondsRecharge PondsSagpondsStabilization Ponds

RT Lagoons.Storage Reservoirs

Pontoons Population Density

UF Species Density BT Density

Population DynamicsUF Population Growth

Population Equivalents Population Exposure

UF Exposure RT Pollution Load

Water Pollution EffectsPopulation Growth

USE Population DynamicsPopulations

AT Animal Populations Aquatic Populations Fish Populations Human Population Plant Populations

PopulusUSE Cottonwood Trees

Pore PressureRT Water Pressure

Pore Size Pore Water

USE Interstitial WaterPores

RT OrificesPorosity

NT Soil PorosityPorous Media

RT Capillary Water

Port Authorities Port Facilities

UF Waterfront Facilities Portland Cements

BT CementsPostimpoundment

BT Reservoir StagesPotable Water

BT Water RT Domestic Water

Drinking WaterPotamogeton Pectinatus

USE Sago PondweedPotash PotassiumPotassium Compounds Potassium Radioisotopes

BT RadioisotopesPotatoesPotential Evaporation

USE Evaporation Rate Potential Flow

BT Flow Potential Water Supply

BT Water Supply Potentiometers Potentiometric Level Potholes Poultry

RT Domestic Animals

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 47

Power Head (Cont) WATER RESOURCES THESAURUS

Power Head Power Transformers

USE Electrical EquipmentPowerplants

UF Substations BT Industrial Plants NT Electric Powerplants

Hydroelectric PlantsNuclear PowerplantsThermal PowerplantsTidal PowerplantsUnderground Powerplants

Pozzolans ,RT Cements

PrairiesRT Grasslands

MeadowsPre-treatment Standards

USE Water Quality StandardsPrecambrian Era

BT Geologic TimePrecast Concrete

BT ConcretesPrecipitation

UF Atmospheric PrecipitationAT Areal Precipitation

Artificial Precipitation Convective Precipitation Cyclonic Precipitation Effective Precipitation HailInitial Precipitation Local Precipitation Orographic Precipitation Probable Maximum Precipitation

RainfallRainstorms Sleet , . . '

Snow ...RT Chemistry of Precipitation

Isohyets Retention

Precipitation ExcessRT Effective Precipitation

Excess RainfallPrecipitation Gages

USE Rain Gages Precipitation Intensity

RT Depth-area-duration Analysis Rainfall Intensity

Precipitation RatePrecipitation ScavengingPrecisionPredationPrediction

NT Economic Prediction RT Forecasting

Projections

PreimpoundmentBT Reservoir Stages

Prescriptive RightsRT Legal Aspects

Present ValueUSE Market Value

PreservationNT Sample Preservation

Pressure ConduitsBT Conduits

Pressure DistributionR T Compaction

High Pressure Load Distribution

Pressure Head Pressure Ice

BT Ice Pressure-measuring Instruments

NT Manometers Piezometers

Strain Gages Venturi Meters . .

Pressurized Water ReactorsBT Nuclear Reactors

Prestressed ConcreteBT Concretes

Pretreatment of WaterRT Water Treatment

PricesRT Economic Aspects

PricingRT Economic Aspects

Primary ProductivityBT Productivity RT Aquatic Productivity

BiomassPrimary Sludge

BT Sludge Primary Wastewater Treatment

BT Wastewater Treatment R T Advanced Wastewater Treatment

Complete Wastewater TreatmentPrimary Waves

BT WavesPrincipal Component Analysis PrioritiesProbabilistic Process

RT Mathematical StudiesStochastic Process

Probability DistributionRT Frequency Distribution

Stationary ProcessProbable Maximum Precipitation

BT PrecipitationProcess Control Process Water

BT Water Productivity

UF Comparative Productivity NT Aquatic Productivity

Primary Productivity Secondary Productivity

Professional PersonnelBT Personnel

Professional SocietiesRT Organizations

ProfilesNT Beach Profiles

Flood Profiles Flow Profiles Hydraulic Profiles Moisture Profiles

Soil Profiles Stream Profiles Water Surface Profiles Water Table Profiles

ProfitRT Economic Aspects

Progressive TaxesBT Taxes

Project BenefitsUSE Benefits

Project PlanningBT Planning

ProjectionsRT Forecasting

Planning Prediction

Propane Propellers

RT RotorsProperty Boundaries

BT Boundaries RT Legal Aspects

Property RightsRT Riparian Rights

Property ValueBT ValueRT Real Property

Proprietary PowerRT Legal Aspects

ProtectionNT Bank Protection

Environmental ProtectionFlood ProtectionFrost ProtectionShore ProtectionSlope Protection

RT InsulationProteins Proteus

BT BacteriaPrototype TestsPrototypesProtozoa

UF CiliatesBT Aquatic AnimalsNT Foraminifera

ProvenanceR T Sedimentation

48 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Radioisotopes

PseudomonasBT Bacteria

Public AccessRT Access Routes

Legal AspectsPublic Benefits

USE BenefitsPublic Health

RT Epidemics Epidemiology Epizootiology

Public HearingsUSE Public Participation

Public InvestmentRT Economic Aspects

Public Lands/?r-Parks

Public Nuisance Public Opinion

RT Attitudes Public Participation

UF Citizen Participation Public Hearings

RT AttitudesSocial Participation

Public PolicyRT Administration

Environmental Policy Operating Policies Policy Making Water Policy

Public Relations Public Rights

RT Legal AspectsPublic Trust Doctrine Public Utility Districts Public Waters

R T Recreation Publications

R T Bibliographies Biographies Documentation Handbooks Thesauri Translations

PuddlingPulp and Paper Industry

UF Bleach PlantsPaper IndustryPaper Machines

NT Kraft MillsSulfite Mills

RT Bleaching Wastes Industrial Plants

Waste PaperPulp Washing Pulp Wastes

UF Black LiquorsKraft Mill Wastes Spent Pulping Liquors

Spent Sulfite Liquors BT Industrial Wastes

White Water RT Kraft Mills

Sulfite LiquorsPulsating Springs

USE GeysersPump Testing Pump Turbines

BT TurbinesPump Wells

BT WellsPumpage Pumped Storage

BT Storage Pumping Pumping Head Pumping Plants

UF Substations Pumping TestsPumps

UF Submersible PumpsPure Cultures

USE Culturing TechniquesPyrite Pyrrophyta

BT AlgaeAT Dinoflagellates

Quality ControlNT Water Quality Control

Quantitative AnalysisRT Mathematical Studies

Quarries QuartzQuercus

USE Oak TreesQueueing Theory

RT Systems AnalysisQuick Gays

BT Soil Types

RRabbitbush Radar Radial Gates

BT GatesRadial Wells

BT WellsRadiation

NT Background Radiation Electromagnetic Waves

Gamma Radiation Infrared Radiation Microwaves Net Radiation Radio Waves Solar Radiation Thermal Radiation Ultraviolet Radiation X-rays

RT Albedo Irradiation Light Intensity Light Quality Wavelengths

Radio Interference Radio Waves

BT Radiation Radioactive Dating

BT DatingRadioactive Half-life

UF Half-life Radioactive Springs

BT SpringsRadioactive Tracers

BT Tracers Radioactive Waste Disposal

BT Waste DisposalRadioactive Wastes

UF Nuclear Wastes BT Wastes R T Fallout

Fuel Reprocessing Industrial Wastes

Radioactive Well LoggingBT Logging (Recording)

Radioactivity Radioactivity Effects Radioactivity Techniques

NT Radiochemical AnalysisRadiochemical Analysis

BT Radioactivity TechniquesRadioecology

BT Ecology Radioisotopes

NT Arsenic Radioisotopes Cadmium Radioisotopes Carbon Radioisotopes Cesium Radioisotopes Chlorine Radioisotopes Chromium Radioisotopes Cobalt Radioisotopes Gold Radioisotopes Iodine Radioisotopes Iron Radioisotopes Krypton Radioisotopes Lead Radioisotopes Manganese Radioisotopes Phosphorus Radioisotopes Potassium Radioisotopes Radium Radioisotopes Rubidium Radioisotopes Ruthenium Radioisotopes

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 49

Radioisotopes (Cont.) WATER RESOURCES THESAURUS

Strontium Radioisotopes TritiumUranium Radioisotopes Yttrium Radioisotopes Zinc Radioisotopes

RT Isotope Studies

Radiometry Radiosondes Radium Radioisotopes

BT Radioisotopes

RailroadsR T Transportation

Rain(Particles of Liquid Water)

UF Raindrops

Rain ForestsBT Forests

Rain GagesUF Precipitation Gages

Snow Gages BT Gages

Raindrops USE Rain

RainfallBT Precipitation AT Acid Rain

Excess RainfallNet RainfallRainstormsSimulated RainfallStemflow

RT Cloudbursts

Rainfall Area Rainfall Disposition Rainfall Distribution Rainfall Impact Rainfall Index Rainfall Infiltration

BT Infiltration

Rainfall IntensityRT Depth-area-duration Analysis

Precipitation Intensity

Rainfall PenetrationRT Moisture Gradient

Rainfall Rate Rainfall Simulators

RT Simulated Rainfall

Rainfall-runoff RelationshipsRT Runoff

RainstormsBT Precipitation

RainfallStorms

RT Cloudbursts

Range GrassesBT Grasses

Range ManagementRT Farm Management

Rapid ExcavationBT ExcavationRT Nuclear Explosions

Rapid FlowUF Supercritical Flow BT Flow

Rare Earth Elements(See Also Names of Elements)

Rate of ReturnRT Economic Aspects

Rating FlumesBT Flumes

Rational FormulaRT Mathematical Studies

Runoff CoefficientRavinement

USE Gully ErosionRavines

BT Valleys NT Gullies

Raw WastewaterUF Crude Wastewater BT Wastewater

Raw WaterBT Water

ReachRT Streams

WaterwaysReagents

RT Chemical Analysis

Real PropertyRT Property Value

Reasonable UseBT Water Use

RecessionAT Groundwater Recession

Recession Curve Recharge

NT Artificial RechargeGroundwater RechargeInjectionNatural RechargePit Recharge

RT Conjunctive UseInduced InfiltrationReplenishment

Recharge BasinsBT Basins

Recharge PondsBT Ponds

Recharge WellsUF Diffusion WellsBT WellsRT Injection Wells

Recirculated WaterBT Water

Reclaimed WaterUF Water Reclamation BT Water

ReclamationUSE Land Reclamation

RecreationUF Outdoor Recreation

Water Sports RT Boating

Camping Fishing

Hunting Ice Skating Public Waters Scuba Diving Snow Skiing Surfboarding Swimming Tourism Travel Wilderness Areas

Recreation Demand Recreation Facilities

AT Boat-launching Ramps Camp Sites Golf Courses Marinas

ParksSwimming Pools

Recreation WastesBT Wastes

RecyclingRT Waste Recovery

Red TideRT Dinoflagellates

Eutrophication

ReefsRT Atolls

Refinery WastesUSE Industrial Wastes

ReflectanceBT Optical Properties

ReforestationUF Afforestation RT Revegetation

Vegetation Establishment

RefractivityBT Optical Properties

RefrigerationR T Cooling

Regenerated WaterBT Water

RegenerationRT Rehabilitation

RegimeUSE Hydrological Regime

Regime ChannelsBT Channels

Regime StreamsBT StreamsRT Graded Streams

RegimenUSE Hydrological Regime

SO BT (broader terml; NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Retention

Regional AnalysisRT Frequency Analysis

Regional DevelopmentRT Community Development

Developing Countries Planning Resources Development

Urban PlanningRegional Roods

BT FloodsRegional Planning

BT Planning Regression Analysis

RT Mathematical StudiesRegressive Taxes

BT Taxes

Regulated FlowBT Flow

RegulationsNT Administrative Regulations

Boating Regulations River Regulations Well Regulations

RT Legal AspectsRehabilitation

UF Lake Rehabilitation RT Lake Restoration

RegenerationReinforced Concrete

BT Concretes Relative Humidity

BT Humidity

Relative RightsRT Legal Aspects

Relaxation MethodRT Mathematical Studies

Relief SewersBT Sewers

Relief WellsBT Drainage Wells

WellsRelocation

NT Highway RelocationRemedies

RT Legal Aspects Negotiations

Remote Control Remote Sensing

RT Aerial Photography Infrared Imagery Satellite Technology Sensors Telemetry

RepairingUSE Maintenance

RepellentsRT Pesticides

ReplenishmentRT Recharge

Representative BasinsBT Basins

Reproducibility Repulsion

RT Legal AspectsResearch Facilities

NT Laboratories RT Institutions

Sites Test Facilities

Research NeedsUSE Research Priorities

Research PrioritiesUF Research Needs

Reservation DoctrineRT Legal Aspects

Reservoir CapacityBT Capacity

Reservoir ConstructionBT Construction

Reservoir DepositionUSE Reservoir Silting

Reservoir Design Reservoir Evaporation

BT Evaporation Reservoir Fisheries

BT Fisheries Reservoir Linings

BT LiningsReservoir Management

USE Reservoir OperationReservoir Operation

UF Reservoir Management Reservoir Releases

RT Flow ControlReservoir Silting

UF Reservoir Deposition BT Silting

Reservoir SitesBT Sites

Reservoir SitingRT Site Selection

Reservoir StagesNT Early Impoundment

Late Impoundment Postimpoundment Preimpoundment

Reservoir StorageBT StorageRT Water Storage

Reservoir YieldRT Water Yield

ReservoirsUF ImpoundmentsNT Balancing Reservoirs

Compensating Reservoirs Detention Reservoirs Distribution Reservoirs

Equalizing Reservoirs Filtered-water Reservoirs Multipurpose Reservoirs Storage Reservoirs

RT Multireservoir Networks Oil Reservoirs

StorageResidual Chlorine

BT Chlorine R T Halogens

Residual OxygenBT OxygenRT Dissolved Oxygen

Residual SoilsRT Soil Genesis

ResinsUF Ion Exchange Resins

ResistanceRT Drag

ToleranceResistance Networks

BT NetworksResistivity Resonance Resource Allocation

UF Allocation of Resources AT Water Allocation

Resources DevelopmentUF National Resource Development BT ExploitationNT Water Resources Development RT Community Development

Geothermal ResourcesIndustrial ProductionMarine Resources

Natural Resources Optimum Development Plans Regional Development

Resources ManagementAT Water Management

Respiration Retaining Walls

BT Check Structures RT Abutments

RetardanceRT Inhibition

RetardantsRT Inhibitors

Retarded FlowBT Flow

Retarding BasinsBT Basins

Retarding ReservoirsUSE Detention Reservoirs

RetentionAT Specific Retention RT Precipitation

Retention BasinsUSE Settling Basins

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 51

Retention Capacity (Cont.) WATER RESOURCES THESAURUS

Retention CapacityBT Capacity

Retention TimeRT Detention Time

Return FlowBT Flow

Return WaterBT Water

ReuseUSE Water Reuse

RevegetationRT Reforestation

Vegetation EstablishmentRevenues

USE Taxes Reverse Osmosis

BT Membrane ProcessesReviews

NT Literature ReviewReynolds Number Rheology

NT DeformationNonnewtonian Flow

Stress Viscosity

RheotropismBT Tropisms

RhizosphereRT Root Zone

RhodophytaBT Algae

Rhyolites/?T Crystalline Rocks

Rice Riddance

RT Legal Aspects

RidgingRT Embankments

RifflesRT Shallow Water

Turbulent FlowRight-of-way

RT Access Routes Easements Legal Aspects

Rigid FoundationsRT Piles

Rigidity Rill Erosion

BT ErosionRT Gully Erosion

RillsRT Channels

RimeRT Frost

Hoar FrostRinse Water

USE Wash Water

Rip CurrentsBT Water Currents

Riparian LandRT Legal Aspects

Riparian RightsRT Legal Aspects

Property Rights Water Rights

Riparian Vegetation Riparian Water Loss

RT Water LossRiparian Waters

BT WaterRT Legal Aspects

Ripple MarksRT Sedimentary Structures

Riprap Rising Stage

BT StagesRT Water Level Fluctuations

RisksRT Economic Aspects

River Basin DevelopmentRT Water Resources Development

River BasinsBT Basins

Catchment AreasRiver Beds

RT StreambedsSubmerged Beds

River FlowBT Flow

River ForecastingBT ForecastingRT Hydrometeorology

River Mechanics River Mouth River Regulations

BT RegulationsRiver Systems River Training River Wash Rivers

NT Adolescent RiversAggrading RiversAlluvial RiversBuried RiversIncised RiversInterstate RiversMature RiversNavigable RiversTidal RiversWild RiversYoung Rivers

RT Streams Water Currents Watercourses Waterways

RoachUF Rutilus BT Fish

Road ConstructionBT Construction

RoadbanksBT Earthworks

RoadsBT Transportation NT Access Routes

Highways RT Paving

Rock Bolts Rock Excavation

BT Excavation Rock Fill Rock Glaciers Rock Mechanics Rock Properties Rock Slope Stability

USE Slope Stability Rock Testing Rockfill Dams

BT DamsRocks

NT Carbonate RocksConglomerate Rocks

Crystalline Rocks Foundation Rocks Igneous Rocks Metamorphic Rocks Sedimentary Rocks

R T Sandstones

RockslidesR T Erosion

Mass WastingRodenticides

BT PesticidesRodents

BT Mammals NT Beavers

Muskrats RT Aquatic Animals

Rolled-earth DamsBT Dams

Roller GatesBT Gates

Rolling DamsBT Dams

Root DevelopmentBT Roots

Root DistributionBT Roots

Root SystemsUSE Roots

Root ZoneBT ZonesRT Rhizosphere

52 BT (broader term); NT (narrower term); RT (related term); UF (used for): (terms which have further subsets)

THESAURUS OF DESCRIPTORS Sand Waves

Rooted Aquatic PlantsBT Aquatic Plants

RootsUF Root Systems NT Root Development

Root DistributionRotary Drilling

BT Drilling Rotational Flow

BT FlowRotenone

RT Fish Control AgentsRotifers

BT Aquatic Animals Rotors

RT PropellersRotten Ice

BT Ice Roughness Coefficient

UF Coefficient of Roughness BT Channel Morphology RT Abrasion

Chezy Equation Hydraulic Friction Hydraulic Roughness

RoutingAT Diversion

Flood RoutingRoyalties Rubber

RT ElastomersRubidium Radioisotopes

BT RadioisotopesRuminants(See Also Names of Ruminants)

BT MammalsRunning Waters

BT WaterRT Lotic Environment

RunoffAT Agricultural Runoff

Annual RunoffBase RunoffCumulative RunoffFeedlot RunoffGroundwater RunoffStorm RunoffSurface RunoffUrban Runoff

RT Filter CropsRainfall-runoff .RelationshipsSlope DegradationStorm Seepage

Runoff CoefficientRT Rational Formula

Runoff Cycle Runoff Forecasting

BT Forecasting

Runoff Plot Runoff Rates

RT Flow Rates Runoff Volume Rupturing

BT Mechanical Failure Rural Areas Rural Sociology Ruthenium Radioisotopes

BT Radioisotopes Rutilus

USE Roach

Safe YieldBT YieldR T Water Yield

SafetyRT Accidents

HazardsSagebrush

BT PhreatophytesSago Pondweed

UF Potamogeton Pectinatus Sagponds

BT PondsSalamanders

BT Amphibians Saline Aquifers

USE AquifersSaline Lakes

BT LakesSaline Soils

UF Soil Salinity BT Soil Types

Saline WaterUF Salt Water BT Water RT Brines

SeawaterSaline Water Barriers

BT BarriersRT Groundwater Barriers '

Saline Water IntrusionRT Encroachment .

Saline Water Systems Saline-freshwater Interfaces

BT Interfaces AT Upconing

SalinityBT Chemical Properties

Salinity CurrentsBT Water Currents RT Density Currents

Salmo SalarUSE Salmon

Salmo TruttaUSE Trout

SalmonUF Oncorhynchus

Salmo Salar BT Fish

SalmonellaBT Bacteria

Salt BalanceRT Osmotic Pressure

Salt FlatsRT Playas

Salt MarshesBT MarshesRT Tidal Marshes

Salt PansRT Playas

Salt Rejection Salt Tolerance

RT Halophytes Salt Water

USE Saline Water Seawater

SaltationRT Sedimentation

Salts Salvage Value

BT ValueSalvaged Water

BT Water Salvelinus

USE TroutSample Preparation

RT Water SamplingSample Preservation

BT Preservation RT Water Sampling

SamplingAT Bottom Sampling

Snow Sampling Water Sampling

RT Biological SamplesSand

UF Dune Sands BT Sediments

Soil Types RT Alluvium

Sand AquifersBT Aquifers

Sand BoilsR T Geysers

SpringsSand Filters

BT Filters Sand Waves

BT Waves

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 53

Sand Waves (Cont.)

R T Sedimentary StructuresSandbars

BT Mud FlatsShoals

RT Mud Flats

SandpitsSandspitsSandstones

^r Rocks Sanitary Engineering

BT Engineering Sanitary Landfills

BT LandfillsSanitary Wastewater

BT Wastewater

Sanitation Saprophytic Bacteria

BT BacteriaSatellite Technology

UF Earth Satellites Spacecraft Weather Satellites

RT Remote Sensing

Saturated FlowBT Flow

Saturated SoilsBT Soil Types

Saturation.VT Saturation Zone R T Boundary of Saturation

Supersaturation

Saturation Deficit Saturation Index Saturation Zone

BT Saturation Zones

Sausage DamsBT Dams

Saw MillsBT Mills

SawdustBT Industrial Wastes

Scale PreventionUSE Scaling

ScalingUF Scale Prevention R T Corrosion

FoulingScenedesmus

BT ChlorophytaScenery

RT AestheticsScheduling

RT Planning

Scientific PersonnelBT Personnel

Scirpus USE Bulrushes

ScourAT Channel Scour RT Abrasion

Erosion

Screened WellsBT Wells

ScreensNT Well Screens /?r Filters

Screw IceBT Ice

Scuba DivingRT Recreation

SculpinBT Fish

ScumRT Slime

Sea BreezesBT Wind

Sea GrassesBT Aquatic Plants

Sea IceBT Ice

Sea LevelRT Water Level

Sea NettlesBT Coelenterates

Sea UrchinsUSE Echinoderms

Sea WallsRT Breakwaters

SealantsAT Soil Sealants

SealsBT Aquatic Animals

SeashoresBT Shores

Seasonal Depletion » BT Depletion

Seasonal DistributionBT Distribution

Seasonal StorageBT Storage

Seasonal Streams USE Intermittent Streams

Seasonal Variation Seawater

UF Salt Water BT Water RT Brackish Water

Saline WaterSeaweeds

USE Algae

Secchi DisksRT Opacity

Secondary Oil RecoveryBT Oil Recovery

Secondary ProductivityBT ProductivityRT Aquatic Productivity

Secondary WastewaterBT Wastewater Treatment

Secondary Wastewater TreatmentRT Advanced Wastewater Treatment

Complete Wastewater TreatmentSediment Concentration Sediment Control Sediment Discharge Sediment Distribution Sediment Erosion

BT Erosion

Sediment Grading Sediment Load

RT Bed Load Sediment Sampler Sediment Sorting Sediment Transport

RT Tractive Forces Sediment Yield

RT Trap Efficiency Sediment-carrying Capacity

BT Capacity Sediment-water Interfaces

UF Water-sediment Interfaces BT Interfaces RT Earth-water Interfaces

Mud-water Interfaces

Sedimentary BasinsBT Basins

Sedimentary Structures

Sedimentary PetrologyBT Petrology

Sedimentary RocksBT Rocks

Sedimentary StructuresAT Sedimentary Basins RT Alluvial Fans

Alluvial PlainsRipple MarksSand Waves

SedimentationUF SettlingAT Consolidation Sedimentation

Deposition Silting

RT AbrasionAggradationBed LoadDiagenesisLithificationProvenanceSaltationSettling BasinsSuspended LoadSuspended SolidsSuspensionTraction

54 BT (broader term); NT (narrower term): RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Shear Stress

Sedimentation BasinsBT Basins

Sedimentation RatesSedimentologySediments

NT Alluvial DepositsAlluviumBottom SedimentsFluvial SedimentsGlacial SedimentsLake SedimentsMarine SedimentsSandSiltSuspended Sediments

RT Aquatic SoilsMarl

Mud Overburden

Seed Treatment Seedlings Seeds Seep Water

BT WaterSeepage

UF Underseepage NT Canal Seepage

Deep SeepageEffluent SeepageInfluent SeepageStorm SeepageWell Seepage

RT Groundwater Movement Infiltration Percolation

Water LossSeepage Control Seepage Lines

UF Phreatic Lines

Seepage Loss Seepage Pits Seepage Springs

BT SpringsRT Filtration Springs

SeepsBT Percolation

SeichesRT Storm Surges

Seismic Properties Seismic Waves

BT Waves RT Earthquakes

TsunamisSeismographs Seismology

RT Geophysics

Selective Media Selective Withdrawal

UF Withdrawal RT Drawdown

Selectivity Selenastrum

BT ChlorophytaSelenium Self-purification

UF Natural Purification Semiarid Climates

BT ClimatesSemiarid Lands

RT Arid LandsSemipermeable Membranes

BT Membranes Sensitivity Analysis Sensors

RT GagesRemote Sensing

Separated SewersBT Sewers

Separation TechniquesSeptic Sludge

BT SludgeSeptic Tanks

RT Wastewater Treatment Water Tanks

Septic WastewaterBT Wastewater

SerratiaBT Bacteria

SestonRT Aquatic Drift

Settleable SolidsBT Solids

SettlingUSE Sedimentation

Settling BasinsUF Retention BasinsBT BasinsRT Desilting Basins

Sedimentation Stilling Basins

Settling Tanks Settling VelocitySewage

USE WastewaterSewage Bacteria

BT BacteriaSewage Charge

USE Sewage RateSewage Disposal

USE Wastewater DisposalSewage Districts Sewage Gas Sewage Rate

UF Sewage ChargeSewage Systems

USE Sewer Systems

Wastewater FacilitiesSewage Treatment

USE Wastewater TreatmentSewage Works

USE Sewer SystemsWastewater Facilities

Sewer Districts Sewer Gas Sewer Hydraulics

BT HydraulicsSewer Infiltration

BT Infiltration Sewer Separation Sewer Systems

UF Sewage Systems Sewage Works Sewerage

SewerageUSE Sewer Systems

Wastewater FacilitiesSewers

NT Branch Sewers Combined Sewers Depressed Sewers Interceptor Sewers Lateral Sewers Main Sewers Outfall Sewers Relief Sewers Separated Sewers Storm Sewers Storm-overflow Sewers

ShadBT Fish

ShaftsUSE Coal Mining

Excavation Mining Engineering

Shale IceBT Ice

ShalesNT Oil Shale

Shallow WaterBT Water RT Riffles

Water DepthShallow Wells

BT WellsShape

NT Particle ShapeShark

BT FishShear Shear DragShear Strength

USE Strength Shear Stress

BT Stress

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 55

Shear Tests (Cont.) WATER RESOURCES THESAURUS

Shear TestsSheepSheet Erosion

BT ErosionRT Gully Erosion

Sheet FlowUSE Laminar Flow

Shellfish(See Also Names of Shellfish)Shellfish Fanning

BT Aquaculture Fanning

Shelter-beltsRT Windbreaks

ShigellaBT Bacteria

ShinerUF Notropis BT Fish

ShipsRT Boats

Oil Tankers Transportation

ShoalsNT Sandbars RT Mud Flats

Shock LoadsRT Load Distribution

Shore ProtectionBT Protection

Shoreline Cover Shores

NT Lake ShoresSeashores

R T BeachesCoasts

Short-term PlanningBT Planning

Shoulder DitchesBT Ditches

ShrimpUF Penaeus BT Crustaceans

Shrubs(See Also Names of Shrubs) Sierozems

BT Soil TypesSieve Analysis Sieves

R T FiltersSilage

BT FeedsSilica Silicates Silicon Silt

BT Sediments

RT AlluviumSilt Factor Silt Load

RT Suspended LoadSilting

BT Sedimentation NT Reservoir Silting

SilverBT Heavy Metals

Silver Iodide Silverside

BT Fish Simulated Rainfall

BT RainfallRT Artificial Precipitation

Rainfall SimulatorsSimulation Simulation Analysis

RT Mathematical Studies Sink Drains

BT Drains Sinks

BT KarstRT Closed Basins

Sinuous FlowBT FlowRT Turbulent Flow

SiphonsRT Aqueducts

Site SelectionRT Reservoir Siting

SitesNT Reservoir Sites R T Environment

Field Tests Habitats

On-site Investigations Research Facilities

SitingUSE Environmental Effects

Skimming SlabsSlatted Floors

USE Slotted Floors Sleet

BT PrecipitationRT Hail

Slide GatesBT Gates

SlimeRT Scum

Slope DegradationRT Erosion

Runoff Soil Stabilization

Slope GagesBT Gages

Slope ProtectionBT ProtectionRT Soil Conservation

Slope StabilityUF Rock Slope Stability

Slope StabilizationRT Soil Conservation

Soil StabilizationSlopes

NT Insular Slopes Natural Slope

Sloping WavesBT Waves

Slotted FloorsUF Slatted Floors RT Animal Wastes

Waste DisposalSludge

AT Activated SludgeAlum SludgeArtificial SludgeBulking SludgeChemical SludgeDigested SludgeHumus SludgeLiquid Sludge .Primary SludgeSeptic Sludge

RT WastewaterSludge Bank Sludge BedSludge Bulking

USE Bulking SludgeSludge Cake Sludge ConditioningSludge Dewatering

USE Sludge DryingSludge Digestion

BT BkxJegradation Digestion

Sludge Disposal Sludge Drying

UF Sludge DewateringBT DryingRT Dewatering

Sludge Excess Sludge Filters

BT FiltersSludge Lagoons

BT LagoonsSludge Seeding

RT Biological Wastewater TreatmentSludge Solids Sludge Thickening

RT DewateringSludge Utilization Sludge Volume Index Sluice Gates

BT Gates

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Soil Moisture Deficiency

SluicesRT Channels

Conduits Flumes

SlurriesSlushSmall Watersheds

BT Watersheds Smelt

BT Fish Smog

USE Air PollutionSmoke

USE Air Pollution Smolt

BT FishSnail Darter

BT FishSnails

UF Biomphalaria BT Mollusks

SnowBT Precipitation NT Blowing Snow

Drifting Snow New Snow Old Snow

RT FirnSnow Accumulation

BT Accumulation Snow Avalanches

USE AvalanchesSnow Cornice Snow Courses

RT Snow SurveysSnow Cover

NT Snowpack RT Ablation

Snow MantleSnow Density

BT DensitySnow Depth Snow Fences

USE FencesSnow Gages

USE Rain GagesSnow Management Snow Mantle

RT Snow Cover Snow Pillows Snow Removal Snow Samplers

UF Snow TubesSnow Sampling

BT SamplingSnow Skiing

RT Recreation

Snow StorageBT Storage

Snow SurveysBT SurveysRT Snow Courses

Snow TrapsSnow Tubes

USE Snow SamplersSnowdriftSnowlineSnowmelt

UF Melt Water RT Thaw

SnowpackBT Snow Cover

Soaking Soaps

RT Detergents Surfactants

Social Adjustment Social Aspects Social Benefits

USE Benefits Social Change Social Costs

BT Costs Social Impact Social Needs Social Participation

RT Public ParticipationSocial Values SodiumSodium Arsenite Sodium Chloride Sodium Compounds Sodium Hydroxide Sodium Sulfate Soft Water

USE Water SofteningSoftwood

UF Wood RT Lumber

Soil Absorption CapacityBT CapacityRT Water Repellent Soils

Soil AerationBT Aeration

Soil AggregatesBT Aggregates

Soil AlgaeBT Algae

Soil Amendments Soil Analysis Soil Bacteria

BT Bacteria

Soil Cement Soil Chemistry Soil Classification

UF Soil Interpretation BT Classification

Soil Columns Soil Compaction

BT Compaction RT Impervious Soils

Pervious SoilsSoil Conservation

BT Conservation RT Slope Protection

Slope Stabilization Soil Stabilization

Soil Contamination Soil Creep Soil Density

BT Density Soil Density Probes Soil Dispersants

R T SurfactantsSoil Disposal Fields

RT Land DisposalSoil Dynamics Soil Engineering

BT Engineering Soil Environment

BT Environment Soil Erosion

BT ErosionSoil Filters

BT Filters Soil Formation

USE Soil GenesisSoil Fungi

BT FungiSoil Gases Soil Genesis

UF Soil Formation RT Aeolian Soils

Alluvial SoilsGlacial SoilsResidual Soils

Soil HorizonsBT Soil Profiles RT Subsoil

TopsoilSoil Interpretation

USE Soil Classification Soil Management

UF Soil ReclamationSoil MechanicsSoil Moisture

USE Soil Water Soil Moisture Deficiency

BT Moisture Deficiency

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 5t

Soil Moisture Meters (Cont.) WATER RESOURCES THESAURUS

Soil Moisture MetersBT Moisture Meters

Soil Moisture Retention Soil Organic Matter

BT Organic Matter RT Organic Soils

Soil Physical Properties Soil Physics Soil Porosity

BT PorositySoil Pressure Soil Profiles

BT ProfilesNT Soil Horizons

Soil Properties(See Also Specific Soil Properties) Soil Reclamation

USE Soil Management Soil Salinity

USE Saline SoilsSoil Saturation Soil Science Soil Sealants

BT SealantsRT Surface Sealing

Soil SolutionRT Leac hates

Soil WaterSoil Stability

RT ErosionSoil Stabilization

RT Filler CropsSlope Degradation Slope Stabilization Soil Conservation

Soil Strength Soil Structure Soil Surfaces Soil Surveys

BT SurveysSoil Temperature

BT Temperature Soil Tests Soil Texture

UF Fine Textured Soil

Soil Treatment Soil Types

.\'T Acidic Soils Alkaline Soils Benionite Brown Soils Calcareous Soils Caliche Chestnut Soils Clay Loam ClaysColluvial Soils

Hardpan Soils

Kaolinite Laterites Loam Loess Muck Soils Organic Soils Paleosols Peat Soils Podzols Quick Clays Saline Soils SandSaturated Soils Sierozems

RT Aquatic SoilsCohesionless SoilsCohesive SoilsCompacted SoilsExpansive. SoilsForest SoilsImpervious SoilsPervious SoilsSubsoilTopsoilWater Repellent Soils

Soil WaterUF Soil MoistureBT Hygroscopic Coefficient

WaterRT Antecedent Moisture

Available WaterCapillary WaterExcess Water.Fringe WaterHygroscopic WaterHysteresisSoil SolutionWater Repellent Soils

Soil Water PotentialBT Water Potentials

Soil Water Suction Soil Water Table

BT Water Table Soil-moisture Tension

USE Moisture Tension Soil-water-plant Relationships Solar Distillation

BT DistillationSolar Energy

RT Electric Power ProductionSolar Radiation

BT RadiationSolar StillsSolid Waste Disposal

BT Waste DisposalSolid Wastes

BT Wastes RT Industrial Wastes

Municipal Wastes

Solids,VF Mixed Liquor Solids

Settleable Solids Volatile Solids

Solids Contact ProcessesRT Wastewater Treatment

Solifluction#7" Erosion

Solitary WavesBT Waves

SolubilitySolubility Coefficient Solute Transport Solutes Solvents

AT Organic Solvents Sonar

RT Fathometers Sorghum Sorption Sorption Water

USE Pellicular Water Sound Waves

BT Waves Sounding

BT Water DepthSounds

RT Bays Bights

Sovereign ImmunityRT Legal Aspects

SoybeansSpacecraft

USE Satellite TechnologySpartinaSpatial Distribution

BT Distribution Spawning

RT Fish Eggs Hatching

SpeciationRT Evolution

Species CompositionSpecies Density

USE Population DensitySpecies Diversity

UF Diversity Indices R T Ecology

Specific CapacityBT Capacity

Specific ConductivityBT Conductivity

Specific GravityRT Density

Specific HeadRT Physical Properties

Specific Heat Specific Humidity

BT Humidity

58 BT (broader term): NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Statistics

Specific RetentionBT Retention RT Field Capacity

Specific YieldRT Effective Porosity

Storage Coefficient

Specifications/?r Standards

Spectral AnalysisUF Atomic Absorption

Spectrometers Spectrophotometry

UF Infrared Spectrophotometry BT Photometry

SpectroscopyNT Atomic Absorption Spectroscopy

Emission Spectroscopy Infrared Spectroscopy X-ray Spectroscopy

Spent Pulping LiquorsUSE Pulp Wastes

Spent Sulfite LiquorsUSE Pulp Wastes

SphaerotilusBT Bacteria

Spillway CapacityBT Capacity

Spillway ChannelsUSE Overflow Channels

Spillway Crests Spillway Gates

BT Gates Spillway Trough Spillways

UF Overfalls Spirogyra

BT ChlorophytaSpoil Banks

UF Dredge SpoilTailings

BT Banks RT Mine Wastes

Ocean DumpingSpoil Disposal

Spoil DisposalBT Waste Disposal RT Spoil Banks

Spores Sport Fishing

BT FishingRT Commercial Fishing

Spray IrrigationBT Irrigation RT Direct Irrigation

Land Disposal

Spraying Sprays Spring Tides

BT TidesSpring Water

BT WaterRT Ground water Runoff

SpringsNT Artesian Springs

Barrier Springs Boundary Springs Channel Springs Cold Springs Contact Springs Depression Springs Dimple Springs Fault Springs Filtration Springs GeysersGravity Springs Hardpan Springs Hot Springs Intermittent Springs Knoll Springs Lake Bottom Springs Medicinal Springs Mineral Springs Mud Springs Perched Springs Perennial Springs Pocket Springs Radioactive Springs Seepage Springs Submarine Springs Talus Springs Terrace Springs Thermal Springs Valley Springs Volcanic Springs Warm Springs

RT Aquicludes Sand Boils

Sprinkler IrrigationBT Irrigation

Sprinklers SprinklingRT Irrigation

Spruce Trees Spur Dikes

BT Dikes Spurs Squalls

BT Storms Stability Analysis

RT Mathematical Studies Stabilization Lagoons

BT Lagoons Stabilization Ponds

UF Holding Ponds BT Ponds

Stable ChannelsBT Channels

Stable Isotopes Stage Digestion

BT DigestionStage Treatment

RT Wastewater Treatment Water Treatment

Stage-discharge RelationsRT Flow Discharge

StagesNT Bankfull Stage

Falling Stage Rising Stage Warning Stage

Stagnant WaterBT Water

Standard DeviationRT Mathematical Studies

Standard Project FloodUSE Design Floods

StandardsUF GuidelinesAT Design Standards

Water Quality Standards RT Specifications

Standing CropsRT Crop Production

Standing WatersBT WaterRT Lentic Environment

Standing WavesBT Waves

StandpipesRT Water Storage

Stanford Watershed ModelBT Hydrologic Models

StaphylococcusBT Bacteria

Starch State Jurisdiction

BT Jurisdiction RT Legal Aspects

Static HeadStationary Flow

USE Steady FlowStationary Process

RT Probability DistributionStatistical Analysis

RT Mathematical Studies Statistical Methods

RT Mathematical StudiesStatistical Models

BT Model StudiesRT Mathematical Studies

StatisticsRT Mathematical Studies

Statutes USE Legal Aspects

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 59

Steady Flow (ConU WATER RESOURCES THESAURUS

Steady FlowUF Stationary FlowBT FlowRT Unsteady Flow

SteamSteam Turbines

BT TurbinesSteel

RT AlloysSteel Industry

RT Industrial PlantsSteel Pipes

USE Pipes Stemflow

BT Rainfall RT Throughfall

StephanodiscusUSE Diatoms

SteppesRT Grasslands

Sterilants Sterilization Stickleback

BT Fish Stilling Basins

BT BasinsRT Settling Basins

Stilling WellsBT Wells

Stochastic HydrologyBT HydrologyRT Parametric Hydrology

Stochastic ModelsUSE Model Studies

Stochastic ProcessRT Mathematical Studies

Probabilistic ProcessStokes Law Stomata

BT LeavesStomatal Transpiration

BT TranspirationStoneflies

BT Aquatic Insects

StorageAT Bank Storage

Carryover Storage Channel Storage Conservation Storage

^Controlled Storage Cyclic Storage Daily Storage Dead Storage Depression Storage Effective Storage Flood-control Storage Groundwater Storage Holdover Storage Pumped Storage

Reservoir Storage Seasonal Storage Snow Storage Underground Storage Useful Storage Valley Storage Waste Storage Water Storage

/IT ReservoirsStorage Capacity

BT CapacityStorage Coefficient

RT Specific Yield Storage Equation

RT Continuity EquationStorage Gallery Storage Ratio Storage Requirements Storage Reservoirs

BT Reservoirs RT Ponds

Storage TanksUF Holding Tanks RT Water Storage

Water TanksStorm Drainage

USE Storm Runoff Storm Drains

BT DrainsRT Storm Sewers

Storm RunoffUF Storm DrainageBT RunoffRT Detention Reservoirs

Storm WaterUrban Runoff

Storm SeepageUF Subsurface Flow

Subsurface Runoff BT Seepage R T Runoff

Surface RunoffStorm Sewage

USE Storm Wastewater Storm Sewers

BT SewersRT Storm Drains

Storm SurgesBT Surges RT Seiches

Storm TidesBT Tides

Storm WastewaterUF Storm SewageBT WastewaterRT Combined Sewer Overflows

Storm WaterBT WaterRT Storm Runoff

Storm-overflow SewersBT Sewers

RT Combined Sewer Overflows Storms

NT Artificial StormsBlizzardsCloudbursts

CyclonesDesign StormsDust StormsHurricanesRainstormsSquallsThunderstormsTornadoesTyphoons

Strain Strain Gages

BT GagesPressure-measuring Instruments

Strain MeasurementStraitsStratification

NT Chemical Stratification Density Stratification Thermal Stratification

RT Destratiflcation Meromixis

Stratified FlowBT Flow

Stratigraphy Straw

RT MulchesStream Banks

BT Banks Stream Biota

BT Aquatic LifeStream Classification

BT ClassificationStream Degradation

BT Degradation RT Erosion

Stream DischargeUF Stream Flow RT Flow Discharge

Stream ErosionBT Erosion

Stream FisheriesBT Fisheries

Stream FlowUSE Stream Discharge

Stream GagesBT Gages

Stream Gradient Stream Improvement

RT Channel ImprovementStream Order Stream Pollution

RT Water PollutionStream Profiles

BT Profiles

60 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Sucker

Stream StabilizationRT Bank Stabilization

Channel ImprovementStream Upflow

RT FlowStreambeds

RT River BedsSubmerged Beds

StreamflowBT FlowRT Overland Flow

Streamflow DepletionBT Depletion

Streamflow ForecastingBT Forecasting

StreamsUF CreeksNT Acid Streams

Antecedent Streams Braided Streams Coastal Streams Confluent Streams Consequent Streams Continuous Streams Effluent Streams Ephemeral Streams Flashy Streams Glacial Streams Graded Streams Influent Streams Insulated Streams Intermittent Streams Interrupted Streams Natural Streams Nonperennial Streams Perched Streams Perennial Streams Poised Streams Ponded Streams Regime Streams Subterranean Streams Underground Streams

RT Bayous Reach

Rivers Tributaries

Water Currents Watercourses

Streeter-Phelps Equation Strength

UF Bearing Strength Shear Strength Tensile Strength

StreptococcusBT Bacteria

StressBT Rheology NT Moisture Stress

Shear StressTensile StressThermal StressWater Stress

RT CompactionMedian Tolerance Limit

Stress AnalysisUF Stress Distribution

Stress Distribution USE Stress Analysis

Stress-strain Curves Strip Cropping

RT Fanning Strip Mine Lakes

BT LakesStrip Mine Wastes

RT Mine Wastes Strip Mines

RT Coal MinesStrontium

BT Heavy MetalsStrontium Radioisotopes

BT RadioisotopesStructural Beams Structural Behavior Structural Engineering

BT Engineering Structural Geology

BT Geology Structural Models

BT Model StudiesStructural SettlementStructural Water

BT WaterStructure

BT Physical Properties Sturgeon

BT FishSubarctic Zone

BT Climatic Zones Subartesian Wells

BT WellsSubcritical Flow

USE Tranquil FlowSubhumid Climates

BT ClimatesSublethal Effects

RT Pollution LoadWater Pollution Effects

SublimationRT Evaporation

Submarine CanyonsBT Canyons

Submarine SpringsBT Springs

Submarines Submerged Beds

RT Lake Beds River Beds Streambeds

Submerged LandsRT Tide Lands

Submerged PlantsBT Aquatic Plants

SubmergenceRT Drowning

Submersible PumpsUSE Pumps

Subsidence Subsidies

RT Economic Aspects Subsoil

BT Hardpan SoilsRT Soil Horizons

Soil TypesSubsoil Drainage

BT Drainage Subsoil Drains

BT Drains Substations

USE Electrical Transmission Powerplants Pumping Plants

Substrates Subsurface Drainage

BT DrainageRT Groundwater Movement

Subsurface DrainsBT Drains

Subsurface FiltersBT Filters

Subsurface FlowUSE Storm Seepage

Subsurface IceUSE Interstitial Ice

Subsurface IrrigationBT Irrigation

Subsurface MappingBT Mapping

Subsurface RunoffUSE Storm Seepage

Subsurface WaterUF Subterranean Water BT Water NT Groundwater

Subterranean StreamsBT StreamsRT Underground Streams

Subterranean WaterUSE Groundwater

Subsurface WaterSubtropic Zone

BT Climatic Zones Suburban Areas Succession

RT Ecology Sucker

UF Catostomus BT Fish

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 61

Sucker (Cont) WATER RESOURCES THESAURUS

Sucrose USE Sugars

Sudangrass Sugar Beets

USE Beets

Sugar CropsSugarcaneSugars

UF Sucrose

SulfatesUF Ferric Suifate

Sulfides Sulflte Liquors

RT Pulp Wastes Sulfite Mills

BT Pulp and Paper IndustrySulfonates

NT Linear Alkyl Sulfonates

SulfurSulfur Bacteria

BT Bacteria

Sulfur Compounds Sulfur Cycle Sulfuric Acid Sumps Sunfish

BT Fish Supercooling

R T Cooling

Supercritical FlowUSE Rapid Flow

SupersaturationR T Saturation

Supervisory Control Supplemental Irrigation

BT IrrigationSurf

RT Waves

Surface DetentionRT Surface Runoff

Surface DrainageBT DrainageRT Culverts

Surface FlowBT FlowRT Surface Runoff

Surface IrrigationBT Irrigation

Surface Permeability USE Permeability

Surface RunoffBT RunoffRT Excess Rainfall

Ground water Runoff Storm Seepage Surface Detention

Surface FlowSurface Sealing

RT Soil Sealants

Surface TensionBT Physical Properties RT Capillarity

Surface VelocityBT Velocity

Surface WaterBT Water

Surface Water AvailabilityRT Available Water

Surface Water RecordsUF Water RecordsRT Logging (Recording)

Surface-active Agents USE Surfactants

Surface-groundwater RelationsUF Groundwater-surface Relations

SurfactantsUF Surface-active Agents NT Nonionic Surfactants RT Detergents

DispersantsSoapsSoil Dispersants

SurfboardingRT Recreation

Surge TanksRT Water Tanks

SurgesNT Glacier Surges

Storm SurgesSwitching SurgesWind Tides

Surveying Instruments Surveys

UF Inventories NT Geological Surveys

Snow SurveysSoil Surveys

Survival Suspended Load

R T Sedimentation Silt Load Wash Load

Suspended SedimentsBT Sediments

Suspended SolidsR T Sedimentation

Suspended WaterUSE Vadose Water

SuspensionR T Sedimentation

Swamps BT Wetlands NT Mangrove Swamps RT Bogs

Marshes

Muskeg

SwansBT Water Birds

Sweet Potatoes Swimming

RT Recreation Swimming Pools

BT Recreation Facilities Switching Surges

BT Surges

Symbiosis Symposium

BT Conferences Synergistic Effects Synoptic Analysis

RT Data Interpretation

SynthesisAT Biosynthesis

Synthetic HydrologyBT HydrologyRT Parametric Hydrology

SystematicsBT Taxonomy RT Classification

Systems AnalysisRT Dynamic Programming

Input-output Analysis Linear Programming Mathematical Studies Nonlinear Programming Optimization Queueing Theory

Systems EngineeringBT Engineering

Tabellaria USE Diatoms

TaggingRT Tracers

Tailings USE Mine Wastes

Spoil BanksTailrace

NT Afterbays Tailwater

BT Water Talus

RT Erosion Talus Springs

BT SpringsTamarisk

BT Phreatophytes Tangible Benefits

USE Benefits

62 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Throughfall

TanksUSE Water Tanks

Tannery WastesBT Industrial Wastes

Tannins Tariff

RT Economic AspectsTaste

BT Organoleptic PropertiesTaste-producing Algae

BT AlgaeTax Rates

RT Economic Aspects Taxes

UF RevenuesNT Pollution Taxes

Progressive TaxesRegressive Taxes

RT Economic AspectsTaxonomy

NT Systematics RT Classification

TBSUSE Tetrapropylene-benzene Sulfonate

Technical Societies RT Organizations

Technical .Writing Technology Technology Transfer Tectonics Telemetry

RT Remote SensingTracking Techniques

Temperate ZoneBT Climatic Zones

TemperatureNT Air Temperature

Soil Temperature Water Temperature

Temperature Control Temperature Effects

RT Thermal Pollution Thermal Stress

Temperature GradientRT Isotherms

Temporal DistributionBT Distribution

Temporary StreamsUSE Intermittent Streams

Tensile StrengthUSE Strength

Tensile StressBT Stress

Tensiometers Tension Terrace Channels

BT Channels

Terrace SpringsBT Springs

TerracesUSE Geological Terraces

TerracingBT Land Forming NT Contour Terracing

Terrain Analysis RT Topography

Territorial WatersBT Water

Tertiary Wastewater TreatmentBT Wastewater Treatment RT Advanced Wastewater Treatment

Complete Wastewater TreatmentTest Facilities

RT Research FacilitiesTest Holes Test Wells

UF Well Testing BT Wells

Testing ProceduresRT Concrete Testing

Tetrapropylene-benzene SulfonateUF TBS

Textile Mill WastesBT Industrial Wastes RT Bleaching Wastes

TextilesRT Cotton

Fabrics Wool

ThalassiosiraUSE Diatoms

Thalweg Thaw

RT Snowmelt Thawing Theis Equation Theoretical Analysis Thermal Capacity

BT CapacityThermal Conductivity

BT Conductivity RT Heat Transfer

Thermal Discharges USE Thermal Pollution

Thermal Expansion Thermal Plumes

USE Heated Water Plumes Thermal Pollution

Thermal PollutionUF Thermal Discharges

Thermal Plumes RT Heated Water

Temperature EffectsWaste Heat

Thermal Power Thermal Powerplants

BT PowerplantsThermal Properties

RT Hydrothermal StudiesThermal Radiation

BT RadiationThermal Springs

BT Springs RT Geysers

Warm SpringsThermal Stratification

BT StratificationRT Density Stratification

EpilimnionHypolimnionThermocline

Thermal StressUF Thermal Tolerance BT StressRT Temperature Effects

Water Pollution EffectsThermal Tolerance

USE Thermal StressThermal Water

BT WaterRT Heated Water

Thermo-osmosis Thermocline

RT Epilimnion Isotherms Thermal Stratification

ThermocouplesThermodynamic Behavior

USE Thermodynamics Thermodynamics

UF Thermodynamic Behavior NT Entropy

Thermometers Thermophilic Bacteria

BT BacteriaThesauri

RT Publications Thiems Equation Thin Films

BT FilmsAT Monomolecular Films

Thin Layer ChromatographyBT Chromatography

ThiobacillusBT 'Bacteria

Thiocarbamate PesticidesBT Pesticides

Thorium Throughfall

RT Canopy Stemflow

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 63

Thunderstorms (Cont.) WATER RESOURCES THESAURUS

ThunderstormsBT Storms RT Lightning

Tidal Amplitude Tidal Basins

BT Basins Tidal Bores Tidal Currents

BT Water CurrentsTidal Cycle

JUSE Tides Tidal Effects Tidal Efficiency Tidal Energy Tidal Flats

RT Mud FlatsTidal Marshes

Tidal FloodsBT Floods

Tidal HydraulicsBT Hydraulics

Tidal MarshesBT Marshes RT Salt Marshes

Tidal FlatsTidal Powerplants

BT PowerplantsTidal Prism Tidal Range Tidal Rivers

UF Tidal Streams BT Rivers

Tidal StreamsUSE Tidal Rivers

Tidal WatersUSE Tidewater

Tidal WavesBT Waves RT Tsunamis

Tide LandsBT Wetlands , , RT Submerged Lands

TidesUF Tidal Cycle .AT Neap Tides

Spring Tides Storm Tides Wind Tides

TidewaterUF Tidal Waters

TilapiaBT Fish

Tile DrainageBT Drainage

Tile DrainsBT Drains

Tiles Tilting Dams

BT DamsTime of Concentration

USE Concentration TimeTime Series Analysis

RT Mathematical StudiesTiming Tin

BT Heavy MetalsTissue Analysis Titanium

BT Heavy MetalsToads

BT AmphibiansTobacco Tolerance

RT ResistanceTomatoes Topographic Mapping

BT MappingTopography

RT Terrain Analysis Topology Topsoil

RT Soil Horizons Soil Types

TornadoesBT Storms

TortsRT Legal Aspects

Total CostsUSE Costs

Total Organic CarbonUSE Organic Carbon

Total Oxygen DemandUSE Oxygen Demand

TourismRT Recreation

ToxicityNT Pesticide Toxicity

Phytotoxicity RT Poisons

Toxins NT Algal Toxins

Fish Toxins RT Hazardous Materials

PoisonsTrace Elements

R T Heavy MetalsTrace Levels Trace Metals

BT MetalsTracers

NT Environmental Tracers Isotopic Tracers Radioactive Tracers

RT Dye Releases Tagging

Tracking TechniquesRT Telemetry

TractionR T Sedimentation

Traction Load USE Bed Load

Tractive ForcesRT Sediment Transport

Trade AssociationsRT Organizations

Trade WastesUSE Industrial Wastes

Trafficability Training Tranquil Flow

UF Subcritical Flow BT Flow

TransducersUSE Electrical Equipment

Transition FlowBT Flow

Transition ZoneBT Zones

TranslationsRT Publications

Translatory WavesBT Waves

Translocation Transmission Constant

RT Permeability CoefficientTransmission Lines" ' ""-T

RT Electrical TransmissionTransmission Towers

RT Electrical TransmissionTransmissivity Transparency

BT Optical Properties Transpiration

NT Cuticular Transpiration Stomatal Transpiration

RT Water LossTranspiration Control Transpiration Ratio Transport Depletion

BT Depletion ,Transportation

NT Roads RT Aircraft

Boats ;NavigationRailroadsShips

Transverse DrainageBT Drainage

64 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Unit Hydrographs

Trap EfficiencyRT Sediment Yield

Trapping Trash Racks Travel

RT Recreation Traveltirae Travertine Trawling

RT Commercial FishingTreated Water

BT WaterTreaties

RT Legal AspectsTreatment Plants

USE Wastewater FacilitiesTrees(See Also Names of Trees)

NT ConifersDeciduous Trees

RT ForestsTrematodes Trenches

R 7" DitchesTrespass

RT Legal Aspects Triarine Pesticides

BT Pesticides Tributaries

R T Streams Watercourses

Trichoptera USE Caddisflies

Trickle IrrigationBT Irrigation

Trickling FiltersBT Filters

Wastewater TreatmentTripton

RT Aquatic DriftTriticum Aestivum

USE WheatTritium

BT Radioisotopes RT Heavy Water

Trophic LevelNT Dystrophy

EutrophicationMesotrophyOligotrophy

Tropic ZoneBT Climatic Zones

Tropical CyclonesBT Cyclones

Tropical Regions Tropisms

NT Geotropism

Phototropism Rheotropism

TroutUF Salmo Trutta

Salvelinus BT Fish

Trunk SewerUSE Main Sewers

TsunamisBT WavesRT Earthquake Flood

Seismic WavesTidal Waves

TubesRT Aqueducts

TubifexUSE Tubificids

TubificidsUF TubifexBT Aquatic Animals

OligochaetesTuna

BT Fish Tundra Tungsten Tunnel Construction

UF Tunnel Supports BT Construction

Tunnel Failure Tunnel Hydraulics

BT HydraulicsTunnel Linings

BT LiningsTunnel Supports

USE Tunnel ConstructionTunnelingTunnelsTurbidity

BT Physical Properties Turbidity Currents

BT Water Currents RT Density Currents

Turbidity HowBT Flow

TurbinesUF Francis Turbines NT Hydraulic Turbines

Pump Turbines Steam Turbines

TurbulenceUSE Turbulent Flow

Turbulent DiffusionUSE Eddy Diffusion

Turbulent FlowUF Turbulence BT Flow RT Riffles

Sinuous Flow

TurfUSE Turf Grasses

Turf GrassesUF TurfBT GrassesRT Lawns

Turgidity Turnover Time

RT Destratification Natural Recharge

TurtlesBT Aquatic Animals

Two-phase FlowUSE Multiphase Flow

TyphaUSE Cattails

TyphoonsBT Storms

UUltrafiltration

BT FiltrationUltrasonics Ultraviolet Radiation

BT Radiation Unconfined Aquifers

USE AquifersWater Table Aquifers

Unconsolidated AquifersBT Aquifers

UnderflowBT Flow

Underground PowerplantsBT Powerplants

Underground StorageBT Storage

Underground StreamsBT Streams RT Percolating Water

Subterranean StreamsUnderground Structures Underground Waste Disposal

UF Waste Burial BT Waste Disposal RT Injection Wells

UnderseepageUSE Seepage

Underwater Unemployment

RT Employment Uniform Flow

BT FlowUniformity Coefficient Unit Hydrographs

BT Hydrographs

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 65

Unit Hydrographs (Cont.) WATER RESOURCES THESAURUS

NT Composite Unit Hydrographs Distribution Graphs

United NationsRT Organizations

Universities USE Education

Unsaturated FlowBT Flow

Unsaturated ZoneUSE Aeration Zone

Unstable ChannelsBT Channels

Unsteady FlowBT FlowRT Steady Flow

UpconingBT Saline-freshwater Interfaces

Uplift Pressure Upstream

RT Downstream Headwaters

UptakeUSE Absorption

Accumulation Adsorption

UpwellingRT Ocean Circulation

UraniumUranium Radioisotopes

BT Radioisotopes

Urban AreasUF Metropolitan Areas

Urban DevelopmentUSE Urban Planning

Urban DrainageBT Drainage

Urban HydrologyBT Hydrology

Urban PlanningUF Urban Development BT PlanningRT Community Development

Regional Development

Urban Renewal Urban Runoff

BT RunoffRT Detention Reservoirs

Storm Runoff

Urban Sociology Urban Watersheds

BT Watersheds

Urbanization Urea Pesticides

BT Pesticides

Ureas Urine Useful Storage

BT Storage

User ChargesRT Water Costs

Usufructuary RightRT Legal Aspects

UtilitiesUtility Extension

Vacuum DryingBT Drying

Vacuum FiltersBT Filters

Vacuum FiltrationBT Filtration

Vadose WaterUF Suspended Water

Wandering Water BT Water RT Gravity Ground water

Valley SpringsBT Springs

Valley StorageBT Storage

ValleysNT Ravines R T Canyons

ValueUF Water ValueNT Condemnation Value

Market ValueProperty ValueSalvage Value

RT Economic Aspects

VanadiumBT Heavy Metals

Vapor Compression DistillationBT Distillation

Vapor Pressure Vaporization Variability Variation Coefficient Varied Flow

BT Flow

Varieties Vascular Tissues

RT Plant Tissues

Vegetable Crops Vegetation Vegetation Effects

RT Environmental Effects

Vegetation EstablishmentRT Reforestation

Revegetation

Vegetation RegrowthRT Plant Growth

VelocityNT Average Velocity

Effective Velocity Fall Vejocity Surface Velocity Wind Velocity

Velocity Coefficient Velocity Curve Velocity Distribution Velocity Head Velocity of Approach Velocity Potential Ventilation Venturi Meters

BT GagesPressure-measuring Instruments

Vertical DistributionBT Distribution

Vertical FlowBT Flow

Vertical Tube Evaporators USE Evaporators

VerticilliumBT Fungi

Vetch Vibrations Vibrio

BT Bacteria Vigil Basins

BT Basins

Vine Crops Viricides

BT Pesticides Viruses

NT Bacteriophage Coxsackie Virus Enteroviruses Plant Viruses

Viscometers Viscosity

BT Physical PropertiesRheology

NT Kinematic Viscosity RT Density

Viscosity CoefficientUF Absolute Viscosity

Viscous FlowBT Flow

Laminar Flow

66 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Wastewater Treatment

Vitamins Void Ratio Void Space

RT Interstice Volatile Acids

BT AcidsVolatile Solids

BT SolidsVolatility Volcanic Springs

BT Springs VolcanoesVolumetric Analysis Vortices

RT Eddies Row

wWadi

UF Ouedd Wedd

BT Watercourses RT Arroyos

Ephemeral Streams Intermittent Streams

WagesRT Economic Aspects

Wandering Water USE Vadose Water

Warburg Respirometry RT Manometers

Warm SpringsBT Springs RT Hot Springs

Thermal SpringsWarning Stage

BT StagesWarning Systems Wash Load

RT Suspended Load Wash Water

UF Rinse Water BT Water RT Laundering

WashoutsRT Erosion

Waste Burial USE Underground Waste Disposal

Waste CharacteristicsWaste Discharge

USE Wastewater DisposalWaste Disposal

NT Brine DisposalRadioactive Waste Disposal Solid Waste Disposal Spoil Disposal

Underground Waste Disposal Wastewater Disposal

RT Incineration Land Disposal Ocean Dumping Slotted Floors

Waste DumpsRT Garbage Dumps

LandfillsWaste Heat

RT Thermal PollutionWaste Identification Waste Load

RT Organic Loading Waste Management Waste Paper

BT WastesRT Pulp and Paper Industry

Waste RecoveryRT Recycling

Waste StorageBT Storage

Waste TreatmentUSE Wastewater Treatment

Waste-assimilative CapacityBT Capacity

WastesNT Animal Wastes

Artesian Wastes Domestic Wastes

Farm Wastes Field Wastes

Industrial Wastes Liquid Wastes Operation Wastes Organic Wastes Radioactive Wastes Recreation Wastes Solid Wastes Waste Paper Wood Wastes

WastewaterUF SewageBT WaterAT Barn Wastewater

Chemical Wastewater Clarified Wastewater Combined Wastewater Filtered Wastewater Industrial Wastewater Municipal Wastewater Oxidized Wastewater Raw Wastewater Sanitary Wastewater Septic Wastewater Storm Wastewater

RT Biochemical Oxygen Demand Chemical Oxygen Demand Domestic Wastes

Sludge

Wastewater Analysis Wastewater Collection Wastewater Composition Wastewater Dilution

BT Wastewater Treatment Wastewater Discharge

USE Wastewater Disposal Wastewater Disposal

UF DilutionSewage DisposalWaste DischargeWastewater Discharge

BT Waste Disposal RT Broad Irrigation

CesspoolsLand DisposalWastewater Irrigation

Wastewater FacilitiesUF Sewage Systems

Sewage WorksSewerageTreatment Plants

RT Water Treatment FacilitiesWastewater Farming

BT FarmingRT Broad Irrigation

Wastewater IrrigationBT IrrigationRT Wastewater Disposal

Wastewater LagoonsBT Lagoons

Wastewater Management Wastewater Outfall

BT OutfallWastewater Oxidation

BT OxidationWastewater Treatment

Wastewater PollutionWastewater Purification

USE Wastewater Treatment Wastewater Reclamation

USE Wastewater Renovation Wastewater Renovation

UF Wastewater Reclamation NT Water Reuse

Wastewater TransportUSE Water Transport

Wastewater Treatment(Treatment prior to its release into the en­

vironment)UF' Sewage Treatment

Waste Treatment Wastewater Purification

NT Activated Sludge ProcessAdvanced Wastewater Treatment Biological Wastewater Treatment Chlorination

Coagulation Combined Treatment Complete Wastewater Treatment Contact Beds

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 67

Wastewater Treatment (Cont)

Filtration Flocculation Fluidized Bed Process Foam Separation Intermittent Filters Oxidation Process Primary Wastewater Treatment Secondary Wastewater Tertiary Wastewater Treatment Trickling Filters Wastewater Dilution Wastewater Oxidation

RT AerationChemical TreatmentClarificationPhysicochemicaJ TreatmentSeptic TanksSolids Contact ProcessesStage Treatment

Water(Term not used in indexing or retrieval)

NT Acidic Water Alkaline Water Atmospheric Water

Available Water Boiler Water Bottom Water Bound Water Brackish Water Capillary Water Coastal Waters Combined Water Connate Water Cooling Water Deep Water Distilled Water Domestic Water Drainage Water Excess Water Fissure Water Floodwaier Free Water Fugitive Water Funicular Water

Groundwater Heated Water Heavy Water Hygroscopic Water Imported WaterIndustrial Water ' : Influent Water Intermediate Water Internal Water International Waters Interstitial Water Irrigation Water Juvenile Water Magmatic Water Metamorphic Water Meteoric Water Mineral Water Municipal Water Natural Waters Navigable Waters Nonnavigab'.e Waters Pellicular Water Pendular Water Perched Water

Percolating Water .... Plerotic Water Plutonic Water Potable Water Process Water Raw Water Recirculated Water Reclaimed Water Regenerated Water Return Water . Riparian Waters Running Waters Saline Water Salvaged Water Seawater Seep Water Shallow Water Soil Water Spring Water Stagnant Water Standing Waters Storm Water Structural Water

Subsurface Water Surface Water Tailwater Territorial Waters Thermal Water Treated Water Vadose Water Wash Water

Wastewater Well Water

Water AllocationBT Resource Allocation

Water AnalysisNT Bacterial Analysis

Chemical Analysis Microscopic Analysis Physical Analysis.

Water AvailabilityUSE Available Water

Water BalanceUSE Hydrologic Budget

Water BeetlesBT Aquatic Insects

Water BirdsBT Birds NT Gulls

Swans RT- Waterfowl

Water BleedingUF Water Flooding

Water BoundaryBT Boundaries

Water Budget USE Hydrologic Budget

Water CirculationUF Lake Circulation RT Meromixis

Ocean CirculationWater Conditioning Water Conservation

BT Conservation

Water Consumption USE Water Use

Water Control Water Conveyance

UF Water Supply Systems NT Water Mains RT Aqueducts

Conveyance StructuresWater Distribution

Water CoolingBT CoolingRT Cooling Water

Water CostsBT CostsRT User Charges

Water CurrentsUF Currents

Ocean Currents NT Bottom Currents

Density CurrentsEddiesLongshore CurrentsNontidal CurrentsRip CurrentsSalinity CurrentsTidal CurrentsTurbidity CurrentsWind-driven Currents

RT Rivers Streams Watercourses

Water CycleUSE Hydrologic Cycle

Water DeficitRT Drought

Water ShortageWater Delivery ,. v Water Demand Water Depth

UF Depth NT Sounding RT Deep Water

Shallow Water Water Level

Water DevelopmentUSE Water Resources Development

Water DistributionRT Water Conveyance

Water Districts Water ExchangeWater Hooding

USE Water BleedingWater Flow

USE Flow DischargeWater Harvesting Water Holes Water Hyacinth

UF Eichornia

Water ImportingRT Hydrological Regime

68 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Water Table Rise

Water Injury Water Law

RT Legal AspectsWater Level

NT Bankfull StageFalling Stage

RT DrawdownDriving HeadGroundwater LevelHydrostatic Level

Piezometers Sea Level

Water Depth Water Table Rise

Water Level FluctuationsBT FluctuationsNT Water Table FluctuationsRT Falling Stage

High Water MarkLow Water MarkRising Stage

Water Level Recorders Water Loss

RT Absorption Loss Diversion Losses

Evaporation Interception Leakage

PercolationRiparian Water Loss

Seepage Transpiration

Water MainsBT Water Conveyance RT Pipelines

Water ManagementBT Resources Management NT Groundwater Management

Metropolitan Water Management

Water Measurement Water Metering Water Permits

BT PermitsWater Phone Water Plane Water Policy

RT Public PolicyWater Pollution

NT Groundwater Pollution RT Stream Pollution .

Water Pollution ControlUF Abatement

Pollution AbatementPollution ControlPollution Prevention

RT Environmental ProtectionWater Pollution Effects

UF Pollution Effects RT Lethal Limit

Median Tolerance LimitPopulation ExposureSublethal Effects

Thermal Stress Water Pollution Prevention

UF Pollution Prevention Water Pollution Sources

UF Pollution Sources Water Pollution Treatment Water Potentials

UF Irrigation Potential Leaf Water Potential

NT Plant Water Potential Soil Water Potential

Water PressureBT Physical Properties RT Pore Pressure

Water PropertiesAT Biological Properties

Chemical Properties Optical Properties Organoleptic Properties Physical Properties

Water Purification USE Water Treatment

Water QualityUF Water Quality Data RT Impaired Water Quality

Water Quality ControlBT Quality Control

Water Quality Criteria USE Water Quality Standards

Water Quality DataUSE Water Quality

Water Quality Management Water Quality Standards

UF Effluent StandardsPre-treatment Standards Water Quality Criteria

BT StandardsWater Quantity

USE Water SupplyWater Rates

RT Economic AspectsWater Reclamation

USE Reclaimed Water Water Records

USE Surface Water RecordsWater Repellent Soils

RT Soil Absorption Capacity Soil Types

Soil WaterWater Requirements

RT Irrigation Requirements Water Resources Development

UF Water DevelopmentBT Resources DevelopmentAT Water Supply DevelopmentRT River Basin Development

Water Resources InstitutesRT Organizations

Water ReuseUF ReuseBT Wastewater Renovation^r Water Use

Water RightsRT Legal Aspects

Riparian RightsWater Sampling

BT Sampling RT Sample Preparation

Sample PreservationWater Scarcity

RT Water ShortageWater Shortage

RT Drought Moisture Deficiency

Water Deficit Water Scarcity

Water SofteningUF Soft Water

Water SportsUSE Recreation

Water Spreading Water Storage

BT Storage RT Reservoir Storage

Standpipes Storage Tanks

Water TanksWater Stress

BT Stress Water Supply

UF Water QuantityAT Potential Water Supply

Water Supply DevelopmentUF Well DevelopmentBT Water Resources DevelopmentRT Groundwater Mining

Water Supply SystemsUSE Water Conveyance

Water Surface ProfilesBT Profiles

Water TableAT Interrupted Water Table

Natural Water Table Perched Water Table Soil Water Table

RT DrawdownWater Table Aquifers

USE Unconfined AquifersWater Table Decline Water Table Fluctuations

BT' Water Level Fluctuations RT Groundwater Movement

Water Table Gradient Water Table Profiles

BT ProfilesWater Table Rise

RT Water Level

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 69

Water Table Wells (Cont.) WATER RESOURCES THESAURUS

Water Table WellsBT Wells

Water TanksUF Tanks NT Cisterns RT Septic Tanks

Storage TanksSurge TanksWater Storage

Water TemperatureBT Physical Properties

Temperature

Water TransferNT Interbasin Transfers

Water TransportUF Wastewater Transport AT Pipes RT Aqueducts

Conveyance Structures

Water Treatment(Conditioning For Specific Use)

UF Water Purification NT Chlonnation

Coagulation Feedwater Treatment

Filtration Flocculation Ozonation

RT Chemical Treatment ClarificationPhysicochemical Treatment Pretreatment of Water Stage Treatment

Water Treatment FacilitiesRT Wastewater Facilities

Water UseUF Industrial Water Use

Water Consumption NT Alternative Water Use

Competing Use Conjunctive Use Consumptive Use Impaired Water Use Natural Use Nonconsumptive Use Overdraft Reasonable Use

RT Water Reuse Water Use Efficiency Water Users Water Value

USE Value Water Vapor Water Wheels Water Yield

NT Well Yield RT Reservoir Yield

Safe YieldWater Yield Improvement Water Zoning

BT Zoning

Water-air Interfaces USE Air-water Interfaces

Water-balance Equation USE Hydrologic Equation

Water-bearing Formations USE Aquifers .

Water-carrying CapacityBT Capacity

Water-earth Interfaces USE Earth-water Interfaces

Water-ice InterfacesUSE Ice-water Interfaces

Water-mud InterfacesUSE Mud-water Interfaces

Water-oil InterfacesUSE Oil-water Interfaces

Water-sediment InterfacesUSE Sediment-water Interfaces

WatercoursesNT Artificial Watercourses

Natural Watercourses Wadi

RT ChannelsGrassed Waterways

Rivers Streams

Tributaries Water Currents

Waterfalls Waterfleas

UF Chydorus BT Crustaceans

Waterfowl BT Birds NT Ducks

Geese RT Water Birds

Waterfront FacilitiesUSE Port Facilities

Waterlogging Waterproofing Watershed Development

USE Watershed Management

Watershed ManagementUF Watershed Development

Watershed Protection

Watershed ModelsUSE Model Studies

Watershed ProtectionUSE Watershed Management

WatershedsUF Divides

Hydrologic Basins BT Catchment Areas

Ground water Basins NT Agricultural Watersheds

Demonstration WatershedsForest WatershedsLarge Watersheds

Small Watersheds Urban Watersheds

RT BasinsDrainage Area

WaterwaysAT Inland WaterwaysRT Canals

Navigable Rivers Navigable Waters Reach

Rivers

Wave Action Wave Crest Wave Direction Wave Height Wave Pile-up

RT Waves

Wave Propagation Wave Refraction Wave Runup Wave Velocity Wave Wash Wavelengths

RT Radiation

WavesAT Abrupt Waves

Capillary WavesFlood WavesGravity WavesGroundwater WavesInternal WavesKinematic WavesOcean WavesOscillatory WavesPrimary WavesSand WavesSeismic WavesSloping WavesSolitary WavesSound WavesStanding WavesTidal WavesTranslatory WavesTsunamisWind Waves

RT FetchSurfWave Pile-up

WeatherUF Fronts BT Climatology RT Cloud Cover

Cloud PhysicsWeather Data Collections

BT Data Collections Weather Forecasting

BT Forecasting Weather Modification

AT Artificial Precipitation Artificial Storms Cloud Seeding

70 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

THESAURUS OF DESCRIPTORS Withdrawal

Weather PatternsWeather Satellites

USE Satellite TechnologyWeathering

RT Abrasion Erosion

Weathering Zone Weber NumberWedd

USE WadiWeed Control

NT Aquatic Weed Control RT Algal Control

Brush ControlWeeds

NT Aquatic Weeds RT Nuisance Algae

Weight Weirs

R T Barriers Dams

Well CapacityBT Capacity

Well CasingsBT Casings RT Jetting

Well DataWell Development

USE Water Supply Development Well Drilling

USE DrillingWell Filters

BT FiltersRT Gravel Packing

Well FloodingRT Flood Spreading

Well Function Well Hole Well Hydraulics

BT HydraulicsWell Hydrographs

BT HydrographsWell Intake Well Logs

RT Logging (Recording)Well Permits

BT PermitsWell Regulations

BT RegulationsWell Screens

BT ScreensWell Seepage

BT Seepage Well ShootingWell Testing

USE Test Wells

Well WaterBT Water

Well YieldBT Water Yield

Wellpoints Wells

NT Abandoned Wells Abyssinian Wells Artesian Wells Clear Wells Combination Wells Confined-water Wells Dead Wells Deep Wells Disposal Wells

Drainage Wells Dry Wells Dug Wells Flowing Wells Fully Penetrating Wells Horizontal Wells Injection Wells Inlet Wells Inverted Wells Irrigation Wells Natural Wells Negative Wells Observation Wells Oil Wells Open WellsPartially Penetrating Wells' Pump Wells Radial Wells Recharge Wells Relief Wells Screened Wells Shallow Wells Stilling Wells Subartesian Wells Test Wells Water Table Wells

RT AquicludesWet Air Oxidation

USE Wet Oxidation ProcessWet Climates

BT ClimatesWet Oxidation Process

UF Wet Air Oxidation R T Oxidation

WetlandsNT Bayous

Bogs Fens

Marshes Muskeg

Swamps Tide Lands

WettabilityWettingWhales

BT Aquatic AnimalsWheat

UF Triticum Aestivum

Wheatgrasses White Water

NT Pulp WastesWhitefish

BT Fish Wild Rivers

BT RiversWilderness Areas

R T Environment Open Space Recreation Wildlife Habitats

WildlifeWildlife Conservation

BT ConservationWildlife Habitats

BT HabitatsRT Wilderness Areas

Wildlife Management Willow Trees

BT Phreatophytes Wilting Wilting Coefficient

USE Wilting PointWilting Point

UF Wilting Coefficient RT Field Capacity

WindAT Chinook

Lake BreezesMonsoonsSea Breezes

R T Anemometers .Wind Deposits

USE Aeolian Deposits Wind Erosion

BT ErosionWind Gages

BT Gages Wind Gap Wind PressureWind Setup

USE Wind TidesWind Tides

UF Wind Setup BT Surges

TidesWind Velocity

BT VelocityWind Waves

BT WavesWind-driven Currents

BT Water Currents Windbreaks

RT Shelterbelts Winkler Method Withdrawal

USE Selective Withdrawal

BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets) 71

Withdrawal (Cont.)

WoodUSE Hardwood

SoftwoodWood Wastes

BT Wastes Wool

RT TextilesWool Grease

BT Grease Wool Scouring

X-ray Diffraction X-ray Fluorescence

BT Fluorescence X-ray Spectroscopy

BT SpectroscopyX-rays

BT RadiationRT Gamma Radiation

XerophytesBT Phreatophytes RT Desert Plants

Hydrophytes

Zinc RadioisotopesBT Radioisotopes

ZirconiumBT Heavy Metals

ZonesNT Aeration Zone

Anomorphic Zone Arid Zone Capillary Zone Contiguous Zone Euphotic Zone Littoral Zone Pedicular Zone Root Zone Saturation Zone Transition Zone

R 7 Climatic ZonesZoning

jyr Rood Plain Zoning Water Zoning

RT Land UseLegal Aspects

ZoogloeaBT Bacteria

ZooplanktonBT Plankton

YeastsBT Fungi

YieldAT Economic Yield

Optimal Yield Safe Yield

RT Flow DischargeYield Equations Young Rivers

BT Rivers Youngs Modulus Yttrium Radioisotopes

BT Radioisotopes

Zeolite ProcessZeolitesZero Discharge

RT Discharge Measurement Flow Discharge

Zero Moisture Index Zeta Potential Zinc

BT Heavy Metals

72 BT (broader term); NT (narrower term); RT (related term); UF (used for); (terms which have further subsets)

DESCRIPTOR WORDS

AnAbaloneAbandoned

Abandoned WellsAbatement

Pollution Abatement Abies AblationAbrasionAbrupt

Abrupt WavesAbsolute

Absolute Viscosity Absorbed

Absorbed Water Absorbing

Absorbing Wells Absorption

Absorption Loss Atomic Absorption Atomic Absorption

Spectrophotometry Atomic Absorption

Spectroscopy Neutron Absorption Soil Absorption Capacity

AbstractsAbutments Abyssinian

Abyssinian WellsAcaricidesAccelerated

Accelerated ErosionAccelerated Flow

AccessAccess Routes Public Access

AccidentsAcclimationAcclimatizationAccounting Accretion

Channel AccretionAccumulation

Snow AccumulationAcerAcetate

Cellulose AcetateCellulose Acetate Membranes

AceticAcetic Acid

AcetyleneAcetylene Reduction

AchnanthesAchromobacterAcid

Acetic Acid Acid Mine Drainage Acid Mine Water Acid RainAcid StreamsHydrochloric AcidNitrilotriacetic AcidSulfuric Acid

Acidic Acidic SoilsAcidic Water

AcidityAcids

Amino Acids Fatty Acids Fulvic Acids Humic Acids Inorganic Acids Mine Acids Organic Acids Volatile Acids

Acoustics Acquisition

Data Acquisition Land Acquisition

ActinomycesAction

Capillary ActionMode of ActionWave Action

ActivatedActivated Carbon Activated Sludge Activated Sludge Process

ActivationNeutron Activation Analysis

Active Surface-active Agents

AdaptationAdditives

Concrete AdditivesAdenosine

Adenosine TriphosphateAdhesive

Adhesive Water

AdhesivesAdjudication

Adjudication ProcedureAdjustment

Social AdjustmentAdministration

Contract Administration Administrative

Administrative Agencies Administrative DecisionsAdministrative Regulations

AdolescentAdolescent Riven

AdsorbentsAdsorption Advanced

Advanced Wastewater Treatment

Advection Adverse

Adverse Possession Aedes Aeolian

Aeolian Deposits Aeolian Soils

Aerated Aerated Lagoons Aerated Ponds

Aeration Aeration Zone Extended AerationInstream AerationSoil Aeration

AeratorsAerial

Aerial Photography Aerobacter Aerobic

Aerobic BacteriaAerobic ConditionsAerobic Digestion Aerobic Treatment

AerogenesAeromonasAerosolsAestheticsAestivationAestivum

Triticum Aestivum

AfforestationAfierbaysAgarsAgencies

Administrative AgenciesAgents

Chelating Agents Fish Control Agents Surface-active Agents

Aggradation Aggrading

Aggrading RiversAggregates

Lightweight AggregatesSoil Aggregates

*gi»8 Agreements

International Agreements Agricultural

Agricultural Chemicals Agricultural Engineering Agricultural Hydrology Agricultural Runoff Agricultural Wastes Agricultural Watersheds

Agriculture Agroclimatology Agronomic

Agronomic Crops Agronomy Air

Air Circulation Air Conditioning Air EntrainmentAir MassesAir PollutionAir Pollution EffectsAir TemperatureAir-earth InterfacesAir-water Interfaces Compressed Air Earth-air Interfaces Water-air InterfacesWet Air Oxidation

AircraftAirports AlbedoAlcaligenesAlcoholsAldrinAlewifeAlfalfaAlgae

Algae Harvesting

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-1

Algae (Cont) WATER RESOURCES THESAURUS

Blue-green AlgaeGreen AlgaeMarine AlgaeNuisance AlgaeOdor-producing AlgaeSoil AlgaeTaste-producing Algae

AlgalAlgal BloomsAlgal ControlAlgal GrowthAlgal Toxins

Algicides Algorithms Aliphatic

Aliphatic Hydrocarbons Alkali

Alkali FlatsAlkali Metals

AlkalineAlkaline Earth MetalsAlkaline SoilsAlkaline Water

Alkalinity Alkalis Alkyl

Linear Alkyl Sulfonates Alkylbenzene

Alkylbenzene Sulfonates Alligatonveed Allocation

Allocation of ResourcesCost AllocationResource AllocationWater Allocation

Allotments Alloys Alluvial

Alluvial AquifersAlluvial ChannelsAlluvial DepositsAlluvial FansAlluvial PlainsAlluvial RiversAlluvial Soils

Alluvium Alosa Alpine

Alpine Regions Alteration

Alteration of Flow Alternathera Alternative

Alternative PlanningAlternative Water Use

AlternativesNonstructural Alternatives

AltitudeArea- Altitude Analysis

AlumAlum Sludge

AluminumAluminum Sulfate

AmendmentsSoil Amendments

AminoAmino Acids

Aminotriazole Ammonia Ammoniflcation Ammonium

Ammonium CompoundsAmmonium Salts

Amortization Amphibians Amphibious

Amphibious Plants Amphidinium Amphipods Amphora Amplitude

Tidal Amplitude Anabaena Anacystis Anadromous

Anadromous Fish Anaerobic

Anaerobic BacteriaAnaerobic ConditionsAnaerobic DigestionAnaerobic LagoonsAnaerobic Treatment

AnalogAnalog ComputersAnalog ModelsAnalog/Digital Converters

AnalysisAnalysis of VarianceArea- Altitude AnalysisBacterial AnalysisBenefit-cost AnalysisChemical AnalysisCorrelation AnalysisCost AnalysisCost-benefit AnalysisDepth-area-duration AnalysisDifferential Thermal AnalysisDimensional AnalysisError AnalysisFactor AnalysisFourier AnalysisFrequency AnalysisGraphical AnalysisHydrograph AnalysisHypsometric AnalysisInput-output AnalysisMathematical AnalysisMicroscopic AnalysisMultivariate AnalysisNeutron Activation AnalysisNumerical AnalysisPhysical AnalysisPolarographic AnalysisPrincipal Component AnalysisQuantitative AnalysisRadiochemical AnalysisRegional AnalysisRegression AnalysisSensitivity AnalysisSieve AnalysisSimulation AnalysisSoil AnalysisSpectral AnalysisStability AnalysisStatistical AnalysisStress AnalysisSynoptic AnalystsSystems AnalysisTerrain AnalysisTheoretical AnalysisTime Series Analysis

Tissue AnalysisVolumetric AnalysisWastewater AnalysisWater Analysis

AnastaticAnastatic Water

AnchorAnchor Ice

Anchors Anemometers Anguilla Anhydrite Animal

Animal BehaviorAnimal DiseasesAnimal GrowthAnimal MetabolismAnimal ParasitesAnimal PathologyAnimal PhysiologyAnimal PopulationsAnimal TissuesAnimal Wastes

AnimalsAquatic AnimalsDomestic AnimalsLaboratory AnimalsMarine Animals

AnionAnion Exchange

Anions Anisotropy Ankistrodesmus Annelids Annual

Annual DistributionAnnual FloodsAnnual Runoff

Anodes Anomorphic

Anomorphic Zone Anopheles Antarctic Antecedent

Antecedent MoistureAntecedent Precipitation IndexAntecedent Streams

Antibiotics Anticyclones Antimony Antitranspirants Aphanizomenon Aphotic

Aphotic Zone Apparatus

Desalination Apparatus Apparent

Apparent Water Table Apples Application

Application RatesLand Application

ApplicationsComputer Applications

ApportionmentEquitable Apportionment

AppraisalsLand Appraisals

Appreciation Approach

Velocity of Approach

Appropriation Approximation

Approximation Method Aquaculture Aquariums Aquatic

Aquatic AnimalsAquatic BacteriaAquatic DriftAquatic EcosystemsAquatic EnvironmentAquatic FaunaAquatic FungiAquatic HabitatsAquatic InsectsAquatic LifeAquatic PlantsAquatic PopulationsAquatic ProductivityAquatic SoilsAquatic Weed ControlAquatic WeedsRooted Aquatic Plants

Aqueducts Aquicludes Aquiculture Aquifer

Aquifer CharacteristicsAquifer EvaluationAquifer ManagementAquifer SystemsAquifer Testing

AquifersAlluvia] AquifersArtesian AquifersCarbonate AquifersCoastal AquifersConfined AquifersGlacial AquifersLeaky AquifersPerched AquifersSaline AquifersSand AquifersUnconfined AquifersUnconsolidated AquifersWater Table Aquifers

Aquitards Arch

Arch DamsMultiple Arch Dams

Archaeology Architecture

Naval Architecture Arctic

Arctic Zone Area

Area RedevelopmentArea* Altitude AnalysisDepth-area-duration AnalysisDrainage AreaEvaporation AreaIrrigable AreaRainfall Area

Area!Areal HydrogeologyArea! Precipitation

AreasCatchment AreasCollecting AreasHumid AreasIntertidal AreasMetropolitan AreasRural Areas

DW-2 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Bench

Suburban AreasUrban AreasWilderness Areas

Argon Arid

Arid ClimatesArid LandsArid ZoneArid-zone Hydrology

Aroclors Aromatic

Aromatic CompoundsAromatic Hydrocarbons

Arroyos Arsenic

Arsenic CompoundsArsenic Radioisotopes

Arsenical* Arsenite

Sodium Arsenite Artesian

Artesian AquifersArtesian BasinsArtesian CapacityArtesian FlowArtesian HeadArtesian PressureArtesian SpringsArtesian WastesArtesian WaterArtesian Wells

Arthrobacter Artificial

Artificial LakesArtificial PrecipitationArtificial RechargeArtificial SludgeArtificial StormsArtificial Watercourses

AsbestosAsbestos Cement

AshFly Ash

AspectsEconomic AspectsHydrologic AspectsLegal AspectsPolitical AspectsSocial Aspects

Asphalt Asphaltic

Asphaltic Concrete AssayAssessments Assimilative

Assimilative CapacityWaste-assimilative Capacity

AssociationsTrade Associations

Asterioneila Atlases Atmometen Atmosphere Atmospheric

Atmospheric PhysicsAtmospheric PollutionAtmospheric PrecipitationAtmospheric PressureAtmospheric Water

Atolls Atomic

Atomic Absorption

Atomic Absorption Spectrophotometry

Atomic AbsorptionSpectroscopy

AttachedAttached Oroundwater

AtterbergAtterberg Limits

Attitudes Attractants Augmentation

Flow AugmentationLow-flow Augmentation

AuthoritiesPort Authorities

Autoanalyters Autoclaves Automation Availability

. Groundwater AvailabilityMoisture AvailabilitySurface Water AvailabilityWater Availability

AvailableAvailable HeadAvailable MoistureAvailable WaterMaximum Available Water

AvalanchesSnow Avalanches

AverageAverage FlowAverage Velocity

Avulsion Axenic

Axenic Culture Azotobacter

BBacillariophyceaeBacillusBackbiowrngBackfillBackground

Background LevelsBackground Radiation

Backwash Backwater

Backwater CurveBackwater Effect

BacteriaAerobic BacteriaAnaerobic BacteriaAquatic BacteriaEnteric BacteriaHeterotrophic BacteriaIron BacteriaMarine BacteriaMethane BacteriaNitrogen Fixing BacteriaPathogenic BacteriaPhotosynthetic BacteriaSaprophytic BacteriaSewage BacteriaSoil BacteriaSulfur BacteriaThermophilic Bacteria

BacterialBacterial Analysis

Bacterial Physiology Bactericides Bacteriophage Baffles Baits Balance

Balance of NatureEnergy BalanceGlacier BalanceGlacier Mass BalanceHeat BalanceHydrologic BalanceOxygen BalancePhysiographic BalanceSalt BalanceWater BalanceWater-balance Equation

BalancingBalancing Reservoirs

Balanus Ballast Bank

Bank ErosionBank ProtectionBank StabilizationBank StorageIn-bank CapacitySludge Bank

BankfullBankfull Stage

BanksOuter BanksSpoil BanksStream Banks

Barges Barium Barley Barn

Barn WastesBarn Wastewater

Barnacles Barometric

Barometric Efficiency Barrier

Barrier IslandsBarrier Springs

BarriersFish BarriersGroundwater BarriersSaline Water Barriers

Basalts Base

Base FlowBase Runoff

BaselineBaseline Studies

Bases Basin

Basin IrrigationRiver Basin Development

BasinsArtesian BasinsCatchment BasinsClosed BasinsContinental BasinsDebris BasinsDesilting BasinsDrainage BasinsEqualizing BasinsExperimental BasinsFlood BasinsGroundwater Basins

Hydrologic BasinsInfluence BasinsLake BasinsListing BasinsRecharge BasinsRepresentative BasinsRetarding BasinsRetention BasinsRiver BasinsSedimentary BasinsSedimentation BasinsSettling BasinsStilling BasinsTidal BasinsVigil Basins

BassLargemouth Bass

BatchBatch Culture

Bathylimnion Bathymetry Bathythermographs Bayous Bays Beach

Beach ErosionBeach Profiles

Beaches Beams

Structural Beams Beans Bearing

Bearing StrengthWater-bearing Formations

BeautificationHighway Beautification

Beavers Bed

Bed LoadBed SedimentBed-load DischargeFluidized Bed ProcessSludge Bed

Bedrock Beds

Confining BedsContact BedsFibrous BedsFluidized BedsImpervious BedsLake BedsOwnership of Beds .Packed BedsRiver BedsSubmerged Beds

BeechBeech Trees

BeetlesWater Beetles

BeetsSugar Beets

Beggiatoa Behavior

Animal BehaviorFish BehaviorInsect BehaviorStructural BehaviorThermodynamic Behavior

BeltCorn BeltMeander Belt

BenchBench Flumes

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

Beneficial (Cont.) WATER RESOURCES THESAURUS

BeneficialBeneficial Use

BeneficiationBenefit

Benefit-cost AnalysisCost-benefit AnalystsCost-benefit Ratio

BenefitsComparative Benefits Direct Benefits Estimated Benefits Flood Benefits Indirect Benefits Intangible Benefits Marginal Benefits Monetary Benefits Project BenefitsPublic BenefitsSocial BenefitsTangible Benefits

Benthic Benthic EnvironmentBenthic FaunaBenthic Flora

Benthos BentoniteBenzene

Tetrapropylene-benzene Sulfonate

BenzenesBerm

Bertn DitchesBermsBermudagrass Beryllium Bibliographies BicarbonatesBightsBilgeBindersBioaccumulationBioassay Biochemical

Biochemical Characteristics Biochemical Oxygen Demand Biochemical Tests

Biochemistry BiocidesBioconcentrationBiocontrolBiodegradationBiofiltenBio/iltrationBiographiesBioindicatorsBiological

Biological CommunitiesBiological FiltersBiological MagnificationBiological Membranes Biological Oceanography Biological Oxidation Biological Oxygen Demand Biological Properties Biological SamplesBiological TreatmentBiological Wastewater

TreatmentBiology

Marine Biology

BioluminescenceBiomassBiomphalariaBiorhythmsBiosynthesisBiota

Stream BiotaBiotinBiotransformation Biphenyls

Polychlorinated Biphenyls Birch

Birch Trees Birds

Game Birds Water Birds

BismuthBivalvesBlack

Black Liquors Bleach

Bleach PlantsBleaching

Bleaching WastesBleeding

Water Bleeding BlizzardsBlocks

Bouyoucos BlocksBloodBlooms

Algal Blooms Blowing

Blowing Snow BlowoutsBlue

Blue-green AlgaeBluegillsBluegrassesBoard

Board MillsBoat

Boat-launching Ramps Boating

Boating Regulations BoatsBODBogs

Flow BogsPeat Bogs

BoilerBoiler Water

BoilingBoiling Water Reactors

BoilsSand Boils

BoltsRock Bolts

Bond Bond Issues

Bonding Hydrogen Bonding

BorderBorder IrrigationBorder Springs

BoreholeBorehole Geophysics

BoreholesBores

Tidal BoresBoronBorrow

Borrow PitsBosminaBottles

Drift Bottles Nansen Bottles

Bottom Bottom Currents Bottom Ice Bottom Load Bottom Sampling Bottom SedimentsBottom WaterLake Bottom SpringsOcean Bottom

Bottomland Bound

Bound WaterBoundaries

Geohydrologic Boundaries Impervious BoundariesLeaky BoundariesProperty Boundaries

BoundaryBoundary ConditionsBoundary DisputesBoundary LayersBoundary of SaturationBoundary Processes Boundary Springs Water Boundary

Bouyoucos. Bouyoucos BlocksBowen

Bowen RatioBrackish

Brackish Water Braided

Braided Riven Braided Streams

BranchBranch Sewers

BreakersCircuit Breakers

BreakupIce Breakup

BreakwatersBreeder

Breeder ReactorsBreezes

Lake BreezesSea Breezes

BridgeBridge ConstructionBridge Design Bridge Failure

Bridges Brine

Brine DisposalIce-brine Systems

BrinesHot Brines

BroadBroad Irrigation

BromegrassBromidesBromineBrown

Brown SoilsBrush

Brush ControlBubble

Bubble Gages Bubbles Buckling Budget

Glacier Budget Groundwater Budget Heat Budget Hydrologic Budget Water Budget

BudgetingBuffalo

Buffalo FishBuilding

Building CodesBuilding Materials

Buildings Bulk

Bulk DensityBulkhead

Bulkhead Gates Bulkhead Line

BulkheadsBulking

Bulking SludgeSludge Bulking

Bullhead Bulrushes Bunker

Bunker OilBuoyancyBuoysBurial

Waste BurialBuried

Buried RiversBurning Buttress

Buttress DamsBypass *

Bypass ChannelsByproducts

CC .14 m t *9

CableCable Tool Drilling

Cables -.Electric Cables

CactiCaddis/lies Cadmium

Cadmium Radioisotopes Caenis CaissonsCake

Sludge CakeCalanusCalcareous

Calcareous Soils

DW-4 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS'

DESCRIPTOR WORDS Circulation

Calcite Calcium

Calcium CarbonateCalcium ChlorideCalcium CompoundsCalcium HydroxideCalcium Sulfate

Calibrations Caliche Callinectes Calorimetry Cameras Camp

Camp Sites Camping Canal

Canal ConstructionCanal DesignCanal EmbankmentsCanal LiningsCanal Seepage

Canals , 'Drainage CanalsIrrigation CanalsNavigation Canals

Canneries Canopy Cantilevers Canyons

Submarine Canyons Capacity

Artesian CapacityAssimilative CapacityCapillary CapacityCarrying CapacityDischarge CapacityEffective CapacityField CapacityHeat-capacity MethodHygroscopic CapacityIn-bank CapacityInfiltration CapacityInverted CapacityPeaking CapacityReservoir CapacityRetention CapacitySediment-carrying CapacitySoil Absorption CapacitySpecific CapacitySpillway CapacityStorage CapacityThermal CapacityWaste-assimilative CapacityWater-carrying CapacityWell Capacity

Capillarity Capillary

Capillary ActionCapillary CapacityCapillary Conductivity.Capillary TensionCapillary WaterCapillary WavesCapillary Zone

CapitalCapital Costs

CaptureElectron Capture Gas

Chromatography Carassius Carbamate

Carbamate Pesticides

Carbohydrates Carbon

Activated CarbonCarbon CycleCarbon DioxideCarbon FiltersCarbon RadioisotopesCarbon-14Organic CarbonTotal Organic Carbon

CarbonateCalcium CarbonateCarbonate AquifersCarbonate RocksMagnesium Carbonate

Carbonates Carcinogens Carlo

Monte Carlo Method Carnivores Carotenoids CarpCarpsucker Carrots Carrying

Carrying CapacitySediment-carrying CapacityWater-carrying Capacity

CarryoverCarryover Storage

CaseCase Studies

CasingsWell Casings

Castings Catalysts Catchment

Catchment AreasCatchment Basins

CatfishCatfish FanningCatfish Ponds

Cathodes Cation

Cation Exchange Cations Catostomus Cattails Cattle Causeway Cavern

Cavern Flow Caves Cavitation Cellulose

Cellulose AcetateCellulose Acetate Membranes

CementAsbestos CementSoil Cement

CementsPortland Cements

CenozoicCenozoic Era

Centrifugation Ceratium Ceratophyllum Cereal

Cereal Crops Cerium

Cerium Radioisotopes

CesiumCesium Radioisotopes

Cesspools Chaetoceros Chains

Food Chains Chambers

Growth Chambers Change

Social Change Channel

Channel AccretionChannel DetentionChannel ErosionChannel FlowChannel ImprovementChannel InflowChannel LossChannel MorphologyChannel ScourChannel SpringsChannel StorageOpen-channel DrainageOpen-channel Flow

Channeling Channelization. Channels

Alluvial ChannelsBypass ChannelsDiversion ChannelsFlood ChannelsFlow ChannelsIntercepting ChannelsOpen ChannelsOutlet ChannelsOverflow ChannelsRegime ChannelsSpillway ChannelsStable ChannelsTerrace ChannelsUnstable Channels

Chaparral Chara Characteristics

Aquifer CharacteristicsBiochemical CharacteristicsFlow CharacteristicsWaste Characteristics

CharacterizationOil Characterization

ChargeSewage Charge

ChargesEffluent ChargesUser Charges

Charts Check

Check DamsCheck IrrigationCheck Structures

ChelatesMetal Chelates

ChelatingChelating Agents

Chelation Chemcontrol Chemical

Chemical AnalysisChemical CoagulationChemical CompositionChemical DegradationChemical Engineering

Chemical IndustryChemical InterferenceChemical OxidationChemical Oxygen DemandChemical PotentialChemical PrecipitationChemical PropertiesChemical ReactionsChemical RecoveryChemical ReductionChemical SludgeChemical StratificationChemical StructureChemical TreatmentChemical WastesChemical Wastewater

Chemicals Agricultural Chemicals

ChemistryChemistry of PrecipitationSoil Chemistry

Chemocline Chert Chestnut

Chestnut Soils Chezy

Chezy Equation Chinook Chironomids Chlamydomonas Chlorella Chloride

Calcium ChlorideSodium Chloride

Chlorides Chlorinated

Chlorinated Hydrocarbons Chlorination Chlorine

Chlorine RadioisotopesResidual Chlorine

Chloroform Chlorophyll

Chlorophyll A Chlorophyta Chromatography

Electron Capture Gas Chromatography

Flame lonization Gas Chromatography

Gas ChromatographyGas Liquid ChromatographyThin Layer Chromatography

ChromiumChromium Radioisotopes

Chrysophyta Chubs Chutes Chydorus Cichlid Ciliates Circle

Mohr Circle Circuit

Circuit Breakers Circulation

Air CirculationLake CirculationOcean CirculationWater Circulation

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-3

Cirques (Cont) WATER RESOURCES THESAURUS

Cirques Cisco Cisterns Citizen

Citizen Participation Citrobacter Citrus

Citrus Fruits Civil

Civil DefenseCivil EngineeringCivil LAW

Cladophora Claims Clams Clarification Clarified

Clarified Wastewater Clarifiers Classification

Lake ClassificationLand ClassificationSoil ClassificationStream Classification

ClayClay LoamClay Minerals

ClaysExpansive ClaysQuick Clays

Cleaning Cleanup

Cleanup Operations Clear

Clear WellsClear-cuttingClear-water Reservoirs

ClearingLand Clearing

ClimatesArid ClimatesHumid ClimatesMarine ClimatesOcean ClimatesSemiarid ClimatesSubhumid ClimatesWet Climates

ClimaticClimatic DataClimatic Zones

Climatology Clinolimnion Clogging Closed

Closed BasinsClosed LakesClosed SystemsClosed-conduit Flow

Clostridium Cloud

Cloud CoverCloud PhysicsCloud Seeding

Cloudbursts Clouds Cloven Clupea Coagulation

Chemical Coagulation Coal

Coal Gasification

Coal Mine WastesCoal MinesCoal Mining

Coalescence Coastal

Coastal AquifersCoastal EngineeringCoastal CeomorphologyCoastal MarshesCoastal PlainsCoastal StreamsCoastal WatersCoastal Zone Management

CoasterCoaster Gates

Coasts Coatings Cobalt

Cobalt Radioisotopes Codes

Building Codes Coefficient

Coefficient of PermeabilityCoefficient of RoughnessCorrelation CoefficientDiffusion CoefficientDischarge CoefficientDrainage CoefficientHygroscopic CoefficientInfiltration CoefficientPermeability CoefficientRoughness CoefficientRunoff CoefficientSolubility CoefficientStorage CoefficientUniformity CoefficientVariation CoefficientVelocity CoefficientViscosity CoefficientWilting Coefficient

Coelenterates Cofferdams Cohesion Cohesionless

Cohesionless Soils Cohesive

Cohesive Soils Cold

Cold RegionsCold ResistanceCold SpringsCold Weather Construction

ColiEscherichia Coli

Coliforms Collapse Collecting

Collecting Areas Collection

Meteorological Data Collection

Wastewater Collection Collections

Data CollectionsHydrologic Data CollectionsOn-site Data CollectionsWeather Data Collections

Colleges Colloids Colluvial

Colluvial Soils Color

Color Removal

Colorimetry Columns

Soil Columns Combination

Combination Wells Combined

Combined Sewer OverflowsCombined SewersCombined TreatmentCombined WastewaterCombined Water

CommercialCommercial FishingCommercial Shellfishing

CommissionsInternational CommissionsInterstate Commissions

CommonCommon Law

Communication Communities

Biological CommunitiesPlant Communities

CommunityCommunity Development

CompactedCompacted Soils

CompactionSoil Compaction

CompactsInterstate Compacts

ComparativeComparative BenefitsComparative Productivity

ComparisonComparison Studies

CompensatingCompensating Reservoirs

Compensation Competing

Competing Use Complete

Complete WastewaterTreatment

ComplexesMetal Complexes .

ComponentPrincipal Component Analysis

CompositeComposite Unit Hydrographs

CompositionChemical CompositionSpecies CompositionWastewater Composition

Composting Compound

Compound Hydrographs Compounds

Ammonium CompoundsAromatic CompoundsArsenic CompoundsCalcium CompoundsCopper CompoundsInorganic CompoundsIron CompoundsMagnesium CompoundsNitrogen CompoundsOrganic CompoundsOrganophosphorus

CompoundsPhosphorus Compounds

Potassium CompoundsSodium CompoundsSulfur Compounds

ComprehensiveComprehensive Planning

CompressedCompressed Air

Compressibility Compressible

Compressible Flow Compression

Vapor CompressionDistillation

CompressiveCompressive Strength

ComputerComputer ApplicationsComputer ModelsComputer Programs

ComputersAnalog ComputersDigital ComputersHybrid Computers

ConcentrationConcentration TimeHydrogen Ion ConcentrationSediment ConcentrationTime of Concentration

ConcentrationsDye Concentrations

ConcreteAsphaltic ConcreteConcrete AdditivesConcrete ConstructionConcrete DamsConcrete MixesConcrete PipesConcrete PlantsConcrete PropertiesConcrete TechnologyConcrete TestingMass ConcretePrecast ConcretePrestressed ConcreteReinforced Concrete

Concretes Condemnation

Condemnation Value Condensates Condensation Condensers Conditioning

Air ConditioningSludge ConditioningWater Conditioning

ConditionsAerobic Conditions Anaerobic Conditions Boundary Conditions

Conductance Electrical Conductance

ConductionConductivity

Capillary Conductivity Electrical Conductivity Hydraulic Conductivity Specific Conductivity Thermal Conductivity

Conduit Closed-conduit Flow

Conduits Pressure Conduits

DW-4 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS'

DESCRIPTOR WORDS Cultivated

ConeDebris Cone

Conferences Confined

Confined AquifersConfined GroundwaterConfined-water Wells

ConfinementConfinement Pens

ConfiningConfining Beds

ConfluentConfluent Streams

ConglomerateConglomerate Rocks

ConiferousConiferous Forests

Conifers Conjunctive

Conjunctive Use Connate

Connate Water Consequent

Consequent Streams Conservation

Conservation StorageFish ConservationSoil ConservationWater ConservationWildlife Conservation

ConsolidationConsolidation Sedimentation

ConstantTransmission Constant

ConstitutionalConstitutional Law

ConstraintsInstitutional ConstraintsPolitical Constraints

ConstructionBridge ConstructionCanal ConstructionCold Weather ConstructionConcrete ConstructionConstruction CostsConstruction EquipmentConstruction JointsConstruction MaterialsConstruction MethodsDam ConstructionForeign ConstructionReservoir ConstructionRoad ConstructionTunnel Construction

ConsumptionOxygen ConsumptionWater Consumption

ConsumptiveConsumptive Use

ContactContact BedsContact FiltersContact SpringsContact StabilizationContact Stabilization ProcessSolids Contact Processes

Contaminants Contamination

Groundwater ContaminationSoil Contamination

ContentHeat Content

Moisture Content Contiguous

Contiguous Zone Continental

Continental BasinsContinental HydrologyContinental MarginContinental ShelfContinental Slope

ContinuityContinuity Equation

ContinuousContinuous CultureContinuous FlowContinuous Streams

ContourContour IrrigationContour Terracing

Contours Contract

Contract Administration Contracts Control

Algal ControlAquatic Weed ControlBrush ControlControl FlumesControl SystemsCorrosion ControlCultural ControlEnvironmental ControlErosion ControlEvaporation ControlEvapotranspiration ControlFish Control AgentsFlood ControlFlood-control StorageFlow ControlGeologic ControlHeadwater ControlInsect ControlLand Use ControlMechanical ControlOdor ControlPhysical ControlPollution ControlProcess ControlQuality ControlRemote ControlSediment ControlSeepage ControlSupervisory ControlTemperature ControlTranspiration ControlWater ControlWater Pollution ControlWater Quality ControlWeed Control

ControlledControlled DrainageControlled Storage

Convection Convective

Convective Precipitation ' Conversion

Energy Conversion Converters

Analog/Digital ConvertersElectric Converters

ConveyanceConveyance StructuresLateral Conveyance StructuresWater Conveyance

Coolants Cooling

Cooling PondsCooling TowersCooling WaterWater Cooling

CooperationInteragency Cooperation

Cooperatives Copepods Copper

Copper CompoundsCopper Suifate

Corals Core

Core DrillingCore Logging

Coregonus Cores Coriolis

Coriolis Force Corn

Corn Belt Cornice

Snow Cornice Correlation

Correlation AnalysisCorrelation Coefficient

Corrosion 'Corrosion Control

Corynebacterium Cost

Benefit-cost AnalysisCost AllocationCost AnalysisCost EffectivenessCost Repayment Cost SavingsCost SharingCost-benefit AnalysisCost-benefit Ratio

CostsCapital CostsConstruction CostsElectric Power CostsEstimated CostsMaintenance CostsMarginal CostsOperating CostsOpportunity CostsSocial CostsTotal CostsWater Costs

Cotton Cottonwood

Cottonwood Trees Countries

Developing Countries Courses

Golf CoursesSnow Courses

CoverCloud CoverCover CropsIce CoverShoreline CoverSnow Cover

CoxsackieCoxsackie Virus

CrabsCracksCranberriesCrappieCrassostreaCratersCrayfishCreeksCreep

Soil Creep Creosote Crescentic

Crescentic Lakes Crest

Crest GagesFlood CrestWave Crest

CrestsSpillway Crests

CribCrib Dams

CribsFilter Cribs

CriteriaDesign CriteriaWater Quality Criteria

CriticalCritical DepthCritical DischargeCritical FlowCritical Velocity

CropCrop ProductionCrop Yield

Cropland Cropping

Strip Cropping Crops

Agronomic CropsCereal CropsCover CropsFiber CropsFilter CropsFruit CropsGrain CropsOilseed CropsStanding CropsSugar CropsVegetable CropsVine Crops

CrossCross-sections

CrudeCrude OilCrude Wastewater

Crustaceans Cryogenics Cryology Crystal

Crystal Growth Crystalline

Crystalline Rocks Crystallization Crystallography Crystals

Ice Crystals Culex Cultivated

Cultivated Lands

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-7

Cultivation (Cont.) WATER RESOURCES THESAURUS

Cultivation Cultural > .

Cultural Control Culture

Axenic CultureBatch CultureContinuous CultureCulture Media

CulturesPure Cultures

CulturingCulturing Techniques

Culverts Cumulative

Cumulative Runoff Curing Current

Current Meters Currents

Bottom CurrentsDensity CurrentsElectric CurrentsLongshore CurrentsNontidal CurrentsOcean CurrentsRip CurrentsSalinity CurrentsTidal CurrentsTurbidity CurrentsWater CurrentsWind-driven Currents

CurveBackwater Curve Recession CurveVelocity Curve

CurvesStress-strain Curves

CuticularCuticular Transpiration

CutoffCutoff* Lakes

Cutoffs Cutting

Clear-cuttingCutting Management

Cyanide Cyanophyta . " Cycle

Carbon CycleHydrologic CycleNitrogen CycleRunoff CycleSulfur CycleTidal CycleWater Cycle

CyclesLife Cycles

CyclicCyclic Storage

CyclingCycling Nutrients

CyclonesTropical Cyclones

CyclonicCyclonic Precipitation

Cyclops Cyclotella Cymbella Cyprinus

DDaily

Daily HydrographsDaily Storage

DairyDairy Industry

Dalapon Dam

Dam ConstructionDam DesignDam EffectsDam FailureDam FoundationsDam Stability

DamageFlood Damage

DamsArch DamsButtress DamsCheck DamsConcrete DamsCrib DamsDetention DamsDiversion DamsEarth DamsFixed DamsGravity DamsGroundwater DamsHollow DamsHydraulic-fill DamsMill DamsMovable DamsMultiple Arch DamsNeedle DamsRockfill DamsRolled-earth DamsRolling DamsSausage DamsTilting Dams

Damsites Daphnia Darcy

Darcy-Weisbach Equation Darcys

Darcys Law Darter

Snail Darter Data

Climatic DataData AcquisitionData CollectionsData InterpretationData ProcessingData Storage and RetrievalData TransmissionExperimental DataFlood DataHydrologic DataHydrologic Data CollectionsMeteorological Data

CollectionOn-site Data CollectionsWater Quality DataWeather Data CollectionsWell Data

DatingGroundwater DatingRadioactive Dating

DDD DDE DDT Dead

Dead LoadsDead StorageDead Wells

DebrisDebris BasinsDebris ConeGlacial Debris

Debt Decade

International HydrologicalDecade

Decapods Deciduous

Deciduous ForestsDeciduous Trees

DecisionDecision Making

DecisionsAdministrative DecisionsJudicial Decisions

DeclineWater Table Decline

DecomposingDecomposing Organic Matter

Decomposition Decontamination Deep

Deep PercolationDeep SeepageDeep WaterDeep WellsDeep-water Habitats

Deer Defense

Civil Defense Deficiency

Moisture DeficiencySoil Moisture Deficiency

DeficientDeficient Elements

DeficitOxygen DeficitSaturation DeficitWater Deficit

Deflection Defoliants Deformation Degradation

Chemical Degradation Degradation Products Microbial Degradation Slope Degradation Stream Degradation

DehydrationDehydrogenaseDeicersDelivery

Water DeliveryDeltasDemand

Biochemical Oxygen Demand Biological Oxygen Demand Chemical Oxygen Demand Elasticity of Demand

Electric Power DemandOxygen DemandPeak DemandRecreation DemandTotal Oxygen DemandWater Demand

Demoralization Demonstration

Demonstration FarmsDemonstration Watersheds

Dendrochronology Denitrification Density

Bulk DensityDensity CurrentsDensity StratificationDrainage DensityMoisture DensityPopulation DensitySnow DensitySoil DensitySoil Density ProbesSpecies Density

Denudation Depletion

Groundwater DepletionOxygen DepletionSeasonal DepletionStreamflow DepletionTransport Depletion

DepositionDeposition RatesReservoir Deposition

DepositsAeolian DepositsAlluvial DepositsGlacial DepositsWind Deposits

Depreciation Depressed

Depressed Sewers Depression

Depression HeadDepression SpringsDepression Storage

DepthCritical DepthDepth-area-duration AnalysisSnow DepthWater Depth

DesalinationDesalination ApparatusDesalination PlantsDesalination Wastes

DesertDesert Plants

Deserts Desiccants Desiccation Design

Bridge DesignCanal DesignDam DesignDesign CriteriaDesign FloodsDesign FlowDesign StandardsDesign StormsExperimental DesignForeign Design PracticesHydraulic DesignIrrigation DesignNetwork Design

DW-8 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS"

DESCRIPTOR WORDS Drainage

Reservoir Design Desilting

Desilting Basins Desmids Destrati/ication Detection

Detection LimitsDetection Times

DetentionChannel DetentionDetention DamsDetention ReservoirsDetention TimeSurface Detention

Detergents Deterioration Deterministic

Deterministic Models Detoxification Detrital

Detrital Fans Detritus Deuterium Developing

Developing Countries Development

Community DevelopmentEconomic DevelopmentGroundwater DevelopmentIndustrial DevelopmentLand DevelopmentNational Resource

DevelopmentOptimum Development PlansRegional DevelopmentResources DevelopmentRiver Basin DevelopmentRoot DevelopmentUrban DevelopmentWater DevelopmentWater Resources DevelopmentWater Supply DevelopmentWatershed DevelopmentWell Development

DeviationStandard Deviation

Dew Dewatering

Sludge Dewatering Dewpoint Diagenesis Diagrams

Hydrophase DiagramsPhase Diagrams

Dialysis Diaptomus Diatomaceous

Diatomaceous Earth Diatoms Diazinon Dieldrin Dielectric

Dielectric Properties Diesel

Diesel Oil Diets

Fish Diets Difference

Finite Difference Methods Differential

Differential Equations

Differential Thermal Analysis Diffraction

X-ray Diffraction Diffusion

Diffusion CoefficientDiffusion WellsEddy DiffusionTurbulent Diffusion

DigestedDigested Sludge

DigestionAerobic DigestionAnaerobic DigestionSludge DigestionStage Digestion

DigitalAnalog/Digital ConvertersDigital Computers

DikesSpur Dikes

DilutionWastewater Dilution

DimensionalDimensional Analysis

DimpleDimple Springs

Dinobryon Dino/Iagellates Dioxide

Carbon Dioxide Diquat Direct

Direct BenefitsDirect FlowDirect Irrigation .

DirectionWave Direction

Disasters Discharge

Bed-load DischargeCritical DischargeDischarge CapacityDischarge CoefficientDischarge FrequencyDischarge HydrographsDischarge MeasurementEvaporation DischargeFlood DischargeFlow DischargePeak DischargeSediment DischargeStage-discharge RelationsStream DischargeWaste DischargeWastewater DischargeZero Discharge

DischargesThermal Discharges

DiscountDiscount Rates

DiseasesAnimal DiseasesFish DiseasesHuman DiseasesPlant Diseases

DiseconomiesDiseconomies of Scale

Disinfection Disks

Secchi Disks Dispersants

Soil Dispersants

DispersionDye Dispersion

DisposalBrine DisposalDisposal WellsLand DisposalOcean DisposalRadioactive Waste DisposalSewage DisposalSludge DisposalSoil Disposal FieldsSolid Waste DisposalSpoil DisposalUnderground Waste DisposalWaste DisposalWastewater Disposal

DispositionRainfall Disposition

DisputesBoundary Disputes

DissipationEnergy Dissipation

DissolvedDissolved Organic MatterDissolved OxygenDissolved Solids

DistillationFlash DistillationMultieffect DistillationMultistage Flash DistillationSolar DistillationVapor Compression

Distillation Distilled

Distilled Water Distribution

Annual DistributionDistribution GraphsDistribution PatternsDistribution ReservoirsDiurnal DistributionEcological DistributionFrequency DistributionIncome DistributionLoad DistributionMonthly DistributionPressure DistributionProbability DistributionRainfall DistributionRoot DistributionSeasonal DistributionSediment DistributionSpatial DistributionStress DistributionTemporal DistributionVelocity DistributionVertical DistributionWater Distribution

DistrictsDrainage DistrictsIrrigation DistrictsPublic Utility DistrictsSewage DistrictsSewer DistrictsWater Districts

DitchDitch GrassDitch Linings

DitchesBerm DitchesDiversion DitchesDrainage DitchesField DitchesIntercepting Ditches

Irrigation Ditches Oxidation Ditches Shoulder Ditches

Diurnal Diurnal Distribution

DiuronDiversion

Diversion Channels Diversion Dams Diversion Ditches Diversion Losses Diversion Structures Infiltration Diversion Partial Diversion

Diversity Diversity Indices Species Diversity

Divide Groundwater Divide

DividesDiving

Scuba DivingDobsonfliesDocksDoctrine

Natural Flow Doctrine Public Trust Doctrine Reservation Doctrine

DocumentationDolomiteDomain

Eminent DomainDomestic

Domestic Animals Domestic Wastes Domestic Water

DownstreamDrag

Shear DragDragonfliesDrain

Drain SpacingDrainage

Acid Mine Drainage Controlled Drainage Drainage Area Drainage Basins Drainage Canals Drainage Coefficient Drainage Density Drainage Districts Drainage Ditches Drainage Effects Drainage Engineering Drainage Equilibrium Drainage Networks Drainage Patterns Drainage Practices Drainage Programs Drainage Systems Drainage Terrace Drainage Water Drainage Wells Furrow Drainage Mine Drainage Mole Drainage Open-channel Drainage Storm Drainage Subsoil Drainage Subsurface Drainage Surface Drainage Tile Drainage Transverse Drainage

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-9

Drainage (Conk) WATER RESOURCES THESAURUS

Urban DrainageDrains tr

Sink DrainsStorm DrainsSubsoil DrainsSubsurface DrainsTile Drains

Drawdown Dredge

Dredge Spoil Dredging Drift

Aquatic Drift Drift BottlesGlacial DriftIce DriftLittoral DriftPesticide Drift

DriftingDrifting Snow

DriftwoodDrill

Drill HolesDrill Monitors

Drillers Drillers Logs

Drilling Cable Tool Drilling Core Drilling Drilling Equipment Drilling FluidsDrilling Rate Drilling Samples Rotary Drilling Well Drilling

Drinking Drinking Water

DripDrip Irrigation

DrivenWind-driven Currents

DrivingDriving Head

Drops Fluid Drops

DroughtDrought Resistance

DrowningDrugs DrumDry

Dry FanningDry LakesDry Matter Dry Wells

Drying Forced Drying Freeze Drying Sludge Drying Vacuum Drying

DualDual Media FiltersDual Purpose Plants

DucksDuckweedDuctilityDug

Dug WellsDumping

Ocean DumpingDumps

Garbage Dumps

Waste DumpsDunalliellaDune

Dune SandsDunesDupuit

Dupuit-Forchheimer Theory Durability Duration

Depth-area-duration Analysis Flow Duration

DustDust Storms

DustsDye

Dye ConcentrationsDye DispersionDye Industry WastesDye Releases

DyesDynamic

Dynamic ProgrammingDynamics

Fluid Dynamics Population Dynamics Soil Dynamics

Dystrophic Dystrophic Lakes

Dystrophy

EEarly

Early ImpoundmentEarth

Air-earth InterfacesAlkaline Earth Metals Diatomaceous EarthEarth DamsEarth Pressure Earth Satellites Earth-air Interfaces Earth-water InterfacesRare Earth ElementsRolled-earth DamsWater-earth Interfaces

EarthquakeEarthquake EngineeringEarthquake Flood

EarthquakesEarthworks Easements Echinoderms Ecological

Ecological Distribution Ecological Effects

EcologyPhysiological Ecology

EconometricsEconomic

Economic AspectsEconomic DevelopmentEconomic EfficiencyEconomic EvaluationEconomic FeasibilityEconomic GrowthEconomic ImpactEconomic JustificationEconomic Life

Economic PredictionEconomic RentEconomic Yield

EconomiesEconomies of Scale

EcosystemsAquatic Ecosystems

Ecotypes EddiesEddy

Eddy Diffusion EducationEelEffect

Backwater EffectEffective

Effective CapacityEffective PorosityEffective PrecipitationEffective StorageEffective Velocity

EffectivenessCost Effectiveness

Effects Air Pollution Effects Dam Effects Drainage Effects Ecological Effects Environmental Effects Highway Effects Irrigation EffectsPollution Effects Radioactivity Effects Sublethal Effects Synergistic Effects Temperature Effects Tidal EffectsVegetation EffectsWater Pollution Effects

EfficiencyBarometric Efficiency Economic EfficiencyIrrigation EfficiencyTidal Efficiency Trap Efficiency Water Use Efficiency

EffluentEffluent Charges Effluent LimitationsEffluent Seepage Effluent StandardsEffluent Streams

EffluentsEggs

Fish Eggs Eichornia Elastic

Elastic Properties Elasticity

Elasticity of DemandElasticity of Supply

ElastomersElectric

Electric CablesElectric ConvertersElectric CurrentsElectric FieldsElectric PotentialElectric PowerElectric Power CostsElectric Power DemandElectric Power FailureElectric Power Industry

Electric Power ProductionElectric Power RatesElectric Powerplants

ElectricalElectrical ConductanceElectrical ConductivityElectrical Engineering Electrical Equipment Electrical GroundingElectrical Insulators Electrical Networks Electrical Properties Electrical StudiesElectrical TransmissionElectrical Well Logging

ElectroElectro-osmosis

ElectrochemistryElectrodes

Ion-selective ElectrodesMembrane Electrodes

Electrodialysis ElectrolysisElectrolytesElectromagnetic

Electromagnetic Waves Electron

Electron Capture Gas Chromatography

Electron Microscopy Electronic

Electronic Equipment Electrophoresis Electroplating Element

Finite Element MethodElements

Deficient ElementsRare Earth ElementsTrace Elements

ElevationElodeaEmbankments

Canal Embankments Embryonic

Embryonic Growth StageEminent

Eminent Domain Emission

Emission SpectroscopyEmployee

Employee RelationsEmployment

Employment Opportunities Emulsi/iers Emulsions Encroachment EndrinEnergy

Energy BalanceEnergy ConversionEnergy DissipationEnergy EquationEnergy GradientEnergy LossEnergy SourcesEnergy TransferKinetic EnergyNuclear EnergySolar EnergyTidal Energy

DW-10 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Farms

Enforcement Law Enforcement

Engineering Agricultural Engineering Chemical Engineering Civil Engineering Coastal Engineering Drainage Engineering Earthquake Engineering Electrical Engineering Engineering Geology Engineering Personnel Environmental Engineering Hydraulic Engineering Irrigation Engineering Materials Engineering Mechanical Engineering Mining Engineering Nuclear Engineering Sanitary Engineering Soil Engineering Structural Engineering Systems Engineering

EnrichmentEnteric

Enteric BacteriaEnterobacterEnterovirusesEnthalpyEntrainment

Air EntrainmentEntropyEnvelope

Mohr EnvelopeEnvironment

Aquatic Environment Benthic Environment Estuarine Environment Lentic Environment Littoral Environment Lotic Environment Marine Environment Neritic Environment Soil Environment

Environmental Environmental Control Environmental Effects Environmental Engineering Environmental Gradient Environmental Impact

StatementEnvironmental Management Environmental Policy Environmental Protection Environmental Quality Environmental Sanitation Environmental Surveys Environmental Tracers

EnzymesEphemeral

Ephemeral Lakes Ephemeral Streams

EphemeropteraEpidemicsEpidemiologyEpidermisEpilimnionEpiphytesEpizootiologyEpoxy

Epoxy ResinsEqualizing

Equalizing Basins

Equalizing Reservoirs Equation

Chezy EquationContinuity EquationDarcy-Weisbach EquationEnergy EquationHazen-Williams EquationHydrologic EquationLaplace EquationMannings EquationMomentum EquationStorage EquationStreeter-Phelps EquationTheis EquationThiems EquationWater-balance Equation

EquationsDifferential EquationsEstimating EquationsMathematical EquationsYield Equations

EquilibriumDrainage Equilibrium

EquipmentConstruction EquipmentDrilling EquipmentElectrical EquipmentElectronic EquipmentFarm EquipmentHydraulic EquipmentLaboratory EquipmentMechanical Equipment

EquitableEquitable Apportionment

EquivalentMoisture Equivalent

EquivalentsPopulation Equivalents

EraCenozoic EraMesozoic EraPaleozoic EraPrecambrian Era

Erection Erosion

Accelerated ErosionBank ErosionBeach ErosionChannel ErosionErosion ControlErosion RatesGeologic ErosionGully ErosionRill ErosionSediment ErosionSheet ErosionSoil ErosionStream ErosionWind Erosion

ErrorError Analysis

Errors ERTS Escherichia

Eacherichia Coli Esox Essential

Essential Nutrients Establishment

Fish EstablishmentVegetation Establishment

Esters Estimated

Estimated BenefitsEstimated Costs

EstimatingEstimating Equations

Estuaries Estuarine

Estuarine EnvironmentEstuarine Fisheries

Ethers Ethics Euglena Euglenophyta Euphotic

Euphotic Zone Eutrophic

Eutrophic Lakes Eutrophication Evaluation

Aquifer EvaluationEconomic EvaluationPerformance Evaluation

EvanescentEvanescent Lakes

EvaporationEvaporation AreaEvaporation ControlEvaporation DischargeEvaporation GagesEvaporation PansEvaporation RateFlash EvaporationLake EvaporationPan EvaporationPotential EvaporationReservoir Evaporation

EvaporatorsVertical Tube Evaporators

Evaporimeters Evapotrarupiration

Evapotranspiration ControlEvapotranspiration Potential

Evolution Excavation

Rapid ExcavationRock Excavation

ExcessExcess RainfallExcess WaterPrecipitation ExcessSludge Excess

ExchangeAnion ExchangeCation ExchangeHeat ExchangeInformation ExchangeIon ExchangeIon Exchange ResinsWater Exchange

ExchangersHeat Exchangers

Excretion Expansion

Thermal Expansion Expansive

Expansive ClaysExpansive Soils

Expenditures Experimental

Experimental Basins

Experimental Data Experimental Design Experimental Farms Experimental Watersheds

ExploitationExplorationExplosions

Nuclear ExplosionsExplosivesExportExposure

Population ExposureExtended

Extended AerationExtension

Utility ExtensionExtensometersExtrusion

Extrusion Flow

FabricationFabricsFacilities

Fish Handling Facilities Port Facilities Recreation Facilities Research Facilities Test Facilities Wastewater Facilities Water Treatment Facilities Waterfront Facilities

FactorFactor AnalysisSilt Factor

FactorsLimiting Factors

FailureBridge FailureDam FailureElectric Power FailureFoundation FailureMechanical FailureMohr Failure TheoryTunnel Failure

FallFall Velocity

FallingFalling Stage

Fallout Fallowing Fans

Alluvial FansDetrital Fans

FarmFarm EquipmentFarm LagoonsFarm ManagementFarm PondsFarm UnitsFarm Wastes

FarmingCatfish FarmingDry FarmingFish FanningShellfish FarmingWastewater Farming

FarmsDemonstration Farms

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". Dw-n

Farms (Cont.) WATER RESOURCES THESAURUS

Experimental FarmsFate

Fate of Pollutants ,Fathead

Fathead Minnows FathometersFatigue Fatty

Fatty AcidsFault

Fault Springs Faults

Geologic FaultsFauna

Aquatic FaunaBenthic Fauna

FeasibilityEconomic FeasibilityFeasibility Studies Financial Feasibility

Feces Federal

Federal JurisdictionFeeding

Feeding RatesFeedlot

Feedlot RunoffFeedlot Wastes

FeedlotsFeedsFeedwater

Feedwater Treatment Fences

Snow FencesFensFermentation Ferric

Ferric SulfateFerrobacillusFertilityFertilizationFertilizers Fescues Festuca FetchFiber

Fiber Crops Fibers

DI(k*K* TTili - fmriant rioers Fibrous

Fibrous Beds Field

Field Capacity Field DitchesField InvestigationsField TestsField Wastes

FieldsElectric FieldsOil FieldsSoil Disposal Fields

FillFill Permits Hydraulic Fill Hydraulic-fill DamsD A^*l* CallRock rill

FilmFilm Water

FilmsMonomolecular Films

Thin FilmsFilter

Filter CribsFilter CropsFilter Media

. Filter Rate Filtered

Filtered Wastewater Filtered-water Reservoirs

FiltersBiological Filters Carbon Filters Contact Filters Dual Media FiltersGravity Filters Intermittent FiltersMembrane Filters Percolating FiltersSand FiltersSludge Filters Soil FiltersSubsurface Filters Trickling Filters Vacuum Filters Well Filters

FiltrateFiltration

Filtration Springs Vacuum Filtration

FinanceGovernment Finance

FinancialFinancial Feasibility

Financing Fine

Fine Textured SoilFinishing

Metal-finishing WastesFinite

Finite Difference MethodsFinite Element Method

FirFir Trees

Fires Forest Fires

FirnFish

Anadromous Fish Buffalo FishFish BarriersFish Behavior Fish Conservation Fish Control Agents Fish DietsFish Diseases Fish EggsFish EstablishmentFish FarmingFish FoodFish Food OrganismsFish GillsFish GrowthFish GuidingFish Handling FacilitiesFish HarvestFish Hatcheries Fish Ladders Fish ManagementFish MigrationFish ParasitesFish PassagesFish PhysiologyFish Ponds

Fish PopulationsFish StockingFish ToxinsJelly Fish

Fisheries Estuarine Fisheries Lake FisheriesMarine Fisheries Reservoir Fisheries Stream Fisheries

Fishing Commercial Fishing Fishing Gear Sport Fishing

Fishkill Fissure

Fissure Springs Fissure Water

FissuresGeologic Fissures

FixationNitrogen Fixation

Fixed Fixed DamsFixed GroundwaterFixed Wheel Gates

Fixing Nitrogen Fixing Bacteria

FjordsFlagellatesFlame

Flame lonization Gas Chromatography

Flame PhotometryFlash

Flash DistillationFlash Evaporation Flash Floods

. Multistage Flash DistillationFlashy

Flashy StreamsFlats

Alkali Flats Mud Flats Salt Flats Tidal Flats

FlatwormsFlavobacterium FlexibilityFliesFloating

Floating Ice Floating Plants

FloatsFlocculationFlood

Earthquake FloodFlood BasinsFlood BenefitsFlood ChannelsFlood ControlFlood CrestRood DamageFlood DataRood Discharge Rood Row Rood ForecastingRood FrequencyRood HydrographsRood IrrigationRood PeakRood Plain Management

Rood Plain ZoningRood PlainsRood PreventionRood ProfilesRood Protection Rood Recurrence Interval Rood RoutingRood Spreading Rood Stages Rood WavesRood-control Storage Indirect Rood Measurement Standard Project Rood

FloodgatesFlooding

Water RoodingWell Rooding

FloodproofingFloods

Annual Roods Design RoodsRash Roods Historic Roods Maximum Probable Roods Regional RoodsTidal Roods

FloodwaterFloodways Floors

Slatted RoorsSlotted Roors

FloraBenthic Rora

Flotation FlotsamFloundersFlow

Accelerated Row Alteration of RowArtesian RowAverage RowBase RowCavern RowChannel Row Closed-conduit Row Compressible Row Continuous Row Critical RowDesign RowDirect Row Extrusion RowRood RowRow Around Objects Row Augmentation Row Bogs Row ChannelsRow Characteristics Row ControlRow DischargeRow DurationRow FrictionRow IndexRow MeasurementRow NetsRow ObstructionRow PatternRow ProfilesRow Rates Row Regulators Row ResistanceRow SeparationRow SystemRow VelocityRuid RowGradually-varied Row

DW-12 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS GameGravity FlowGroundwater FlowHeat FlowHigh FlowInstream Flow Irrigation-return Flow. Laminar FlowLow FlowLow-flow AugmentationMaximum FlowMinimum FlowMultiphase FlowNatural Flow . Natural Flow Doctrine Nonnewtonian FlowNonuniform FlowObstruction to FlowOpen-channel FlowOrifice FlowOverland FlowPeak FlowPipe FlowPlane FlowPlug Flow Potential FlowRapid Flow Regulated Flow Retarded FlowReturn Flow River Flow Rotational FlowSaturated Flow . Sheet Flow Sinuous Flow Stationary Flow Steady Flow Stratified FlowStream RowSubcritical RowSubsurface RowSupercritical RowSurface RowTranquil RowTransition Row Turbidity Row Turbulent Row Two-phase Row Uniform Row ... .Unsaturated RowUnsteady Row Varied Row Vertical Row Viscous Row Water Row

Flowering Flowing

Rowing Wells Flowmeters Fluctuations

Water Level RuctuationsWater Table Ructuations

Fluid <Ruid Drops : Ruid DynamicsRuid Row Ruid FrictionRuid Mechanics

FluidizedRuidized Bed ProcessRuidized Beds

FluidsDrilling Ruids

Flumes . . : .'Bench RumesControl Rumes

Head RumesRating Rumes

FluorescenceX-ray Ruorescence

Fluoridation FluoridesFluorineFluorometryFlushingFluvial

Ruvial SedimentsFlux Fly

RyAshFoam

Foam FractionationFoam Separation

FoamingFodderFog

Ice FogFood

Fish Food Fish Food Organisms Food ChainsFood Habits Food Processing Industry Food-processing Wastes

CVl^W.rooas Forage

Forage Grasses Forages Foraminifera Force

Coriolis ForceForced

Forced DryingForces

Tractive ForcesForchheimer

Dupuit-Forchheimer Theory Forebays Forecasting

Rood ForecastingRiver Forecasting Runoff Forecasting Streamflow Forecasting Weather Forecasting

Foreign Foreign Construction Foreign Design Practices Foreign Projects Foreign Research Foreign Testing Foreign TradeForeign Waters

ForestForest FiresForest Hydrology Forest LitterForest Management Forest SoilsForest Watersheds

ForestryForests

Coniferous ForestsDeciduous ForestsMixed ForestsRain Forests

FormationIce Formation

Soil FormationFormations

Geologic FormationsWater-bearing Formations

Forming Land Forming

FormulaRational Formula

FortranFossil

Fossil FuelsFossil Water

FoulingMembrane Fouling

FoundationFoundation FailureFoundation PilesFoundation Rocks

FoundationsDam FoundationsRigid Foundations

FourierFourier Analysts

Fractionation Foam FractionationIsotope Fractionation

Fracture Fracture PermeabilityFracture Springs

Fractures Geologic Fractures

Fracturing Hydraulic Fracturing

FragilariaFrail

Frail LandsFrancis

Francis TurbinesFrazil

Frazil Ice Free

Free Moisture Free SurfacesFree Water

Freeze Freeze Drying Freeze-thaw Tests

Freezing Frequency

Discharge Frequency Rood Frequency Frequency Analysis Frequency Distribution

FreshwaterSaline-freshwater Interfaces

FrictionRow FrictionRuid Friction Friction LossHydraulic Friction

FringeFringe Water

FrogsFrontsFrost

Frost HeavingFrost PreventionFrost ProtectionFrost ThrustingHoar Frost

FrothingFroude

Froude NumberFrozen

Frozen Ground Fruit

Fruit CropsFruits

Citrus FruitsFucusFuel

Fuel Oil Fuel Reprocessing

FuelsFossil Fuels

FugitiveFugitive Water

FullyFully Penetrating Wells

FulvicFulvic Acids

FumigantsFunction

Objective Function Well Function

Funds Participating Funds

FundulusFungi

Aquatic Fungi Pathogenic Fungi Soil Fungi

FungicidesFunicular

Funicular WaterFurrow

Furrow DrainageFurrow Irrigation

FurrowsFusarium Future

Future Planning Fyke

Fyke Nets

GGabions Gages

Bubble Gages Crest Gages Evaporation GagesPrecipitation GagesRain GagesSlope GagesSnow Gages Strain GagesStream Gages Wind Gages

GagingGaging Stations

GainingGaining Streams

GalleryStorage Gallery

GambusiaGame

Game Birds

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-13

Gamma (Cont) WATER RESOURCES THESAURUS

GammaGamma Radiation

Gammanu Cap

Wind Gap Car Garbage

Garbage Dumps Gas

Electron Capture Gas Chromatography

Flame lonization Gas Chromatography

Gas ChromatographyGas Liquid ChromatographyNatural GasSewage GasSewer Gas

GasesSoil Gases

GasificationCoal Gasification

Gasoline Gastropods Gates

Bulkhead GatesCoaster GatesFixed Wheel GatesHigh Pressure Gates ,Hydraulic GatesIntake GatesRadial GatesRoller GatesSlide GatesSluice GatesSpillway Gates

GearFishing Gear

Geese GelsGenerators Genesis

Soil Genesis Geochemistry Geography Geohydrologic

Geohydrologic BoundariesGeohydrologic Units

Geohydrology Geologic

Geologic ControlGeologic ErosionGeologic FaultsGeologic FissuresGeologic FormationsGeologic FracturesGeologic HistoryGeologic JointsGeologic MappingGeologic TimeGeologic Units

GeologicalGeological SurveysGeological Terraces

GeologyEngineering GeologyMarine GeologyStructural Geology

GeometryHydraulic Geometry

GeomorphologyCoastal Geomorphology

GeophysicsBorehole Geophysics

GeothermalGeothermal PowerGeothermal ResourcesGeothermal Studies

Geotropism Germination Geysers Gill

Gill Nets GUIs

Fish Gills Glacial

Glacial AquifersGlacial DebrisGlacial DepositsGlacial DriftGlacial LakesGlacial SedimentsGlacial SoilsGlacial Streams

Glaciation Glacier

Glacier BalanceGlacier BudgetGlacier Mass BalanceGlacier Surges

GlaciersRock Glaciers

Glaciohydrology Glaciology Glucose Goats Gold

Gold Radioisotopes Goldfish Golf

Golf Courses Gomphonema Gonyaulax Gorge

Ice Gorge Gorges Government

Government FinanceGovernment Supports

GovernmentalGovernmental Interrelations

GovernmentsLocal Governments

GradeHydraulic Grade

GradedGraded Streams

GradientEnergy GradientEnvironmental GradientHydraulic GradientMoisture GradientStream GradientTemperature GradientWater Table Gradient

GradingSediment Grading

GraduallyGradually-varied Flow

GrainGrain CropsGrain Size

GramaGrama Grasses

Granites Grants Graphical

Graphical AnalysisGraphical Methods

GraphsDistribution Graphs

GrassDitch Grass

GrassedGrassed Waterways

GrassesForage GrassesGrama GrassesRange GrassesSea GrassesTurf Grasses

Grasslands Gravel

Gravel Packing Gravitational

Gravitational Water Gravity

Gravity DamsGravity FiltersGravity FlowGravity GroundwaterGravity SpringsGravity StudiesGravity WaterGravity WavesSpecific Gravity

Grazing Grease

Wool Grease Green

Blue-green AlgaeGreen Algae

Greenhouses Groins Gross

Gross National Product Ground

Frozen GroundGround Ice

GroundingElectrical Grounding

GroundwaterAttached GroundwaterConfined GroundwaterFixed GroundwaterGravity GroundwaterGroundwater AvailabilityGroundwater BarriersGroundwater BasinsGroundwater BudgetGroundwater ContaminationGroundwater DamsGroundwater DatingGroundwater DepletionGroundwater DevelopmentGroundwater DivideGroundwater FlowGroundwater HydrologyGroundwater IncrementGroundwater InventoryGroundwater IrrigationGroundwater LevelGroundwater ManagementGroundwater Mining

Groundwater MovementGroundwater PollutionGroundwater PotentialGroundwater ProspectingGroundwater RecessionGroundwater RechargeGroundwater ReservoirsGroundwater RunoffGroundwater StorageGroundwater WavesGroundwater-surface RelationsPerched GroundwaterPlerotic GroundwaterSurface-groundwater Relations

Grouting Growth

Algal GrowthAnimal GrowthCrystal GrowthEconomic GrowthEmbryonic Growth StageFish GrowthGrowth ChambersGrowth KineticsGrowth MediaGrowth RatesGrowth StagesImmature Growth StageJuvenile Growth StageLarval Growth StageMature Growth StagePlant GrowthPlant Growth SubstancesPopulation Growth

Guidelines Guiding

Fish Guiding Gulfs Gullies Gulls Gully

Gully Erosion Gullying Gunite Guppies Gutters Gymnodinium Gypsum

HHabitats

Aquatic HabitatsDeep-water HabitatsWildlife Habitats

HabitsFood Habits

Hail Half

Half-lifeRadioactive Half-life

Halides Halogenated

Halogenated Pesticides Halogens Halogeton Halophytes Handbooks Handling

Fish Handling Facilities

DW-14 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

Hypsometric

HarborsHardnessHardpan

Hardpan SoilsHardpan Springs

Hardwood Harvest

Fish Harvest Harvesting

Algae HarvestingWater Harvesting

HatcheriesFish Hatcheries

Hatching Hay Hazardous

Hazardous Materials Hazards Haze Hazen

Hazen-Williams Equation Head

Artesian HeadAvailable HeadDepression HeadDriving HeadHead FlumesHead LossPiezometric HeadPower HeadPressure HeadPumping HeadSpecific HeadStatic HeadVelocity Head

HeadwaterHeadwater Control

Headwaters Health

Public Health Hearings

Public Hearings Heat

Heat. BalanceHeat BudgetHeat ContentHeat ExchangeHeat ExchangersHeat FlowHeat ResistanceHeat TransferHeat TreatmentHeat-capacity MethodLatent HeatSpecific HeatWaste Heat

HeatedHeated Water

Heating Heaving

Frost Heaving Heavy

Heavy MetalsHeavy Water

HeightWave Height

HeleHele-Shaw Models

Helium Hemlock

Hemlock Trees

HeptachlorHerbicidesHerringHeterogeneityHeterotrophic

Heterotrophic Bacteria High

High FlowHigh PressureHigh Pressure OatesHigh VoltageHigh Water Mark

HighwayHighway BeautiflcationHighway EffectsHighway IcingHighway Relocation

Highways Histograms Histology Historic

Historic Floods History

Geologic HistoryLife History Studies

HoarHoar Frost

Hogs Holding

Holding PondsHolding Tanks

HoldoverHoldover Storage

HoleWell Hole

HolesDrill HolesTest HolesWater Holes

HollowHollow Dams

HolomicticHolomictic Lakes

Homogeneity Horizon

Perched Horizon Horizons

Soil Horizons Horizontal

Horizontal Wells Horseshoe

Horseshoe Lakes Horticulture Hortons

Hortons Law Hospitals Hot

Hot BrinesHot Springs

HouseholdHousehold Wastes

Housing Human

Human DiseasesHuman PathologyHuman PhysiologyHuman Population

HumicHumic Acids

HumidHumid Areas .

Humid Climates Humidity

Relative HumiditySpecific Humidity

HumusHumus Sludge

Hunting Hurricanes Hyacinth

Water Hyacinth Hybrid

Hybrid Computers Hydrants Hydrate

Hydrate Processes Hydrates Hydration Hydraulic

Hydraulic ConductivityHydraulic DesignHydraulic EngineeringHydraulic EquipmentHydraulic FillHydraulic FracturingHydraulic FrictionHydraulic GatesHydraulic GeometryHydraulic GradeHydraulic GradientHydraulic JumpHydraulic LoadingHydraulic LossHydraulic MachineryHydraulic MiningHydraulic ModelsHydraulic PermeabilityHydraulic ProfilesHydraulic PropertiesHydraulic RadiusHydraulic RoughnessHydraulic SimilitudeHydraulic StructuresHydraulic SystemsHydraulic TransientsHydraulic TransportationHydraulic TurbinesHydraulic ValvesHydraulic-fill Dams

HydraulicsSewer HydraulicsTidal HydraulicsTunnel HydraulicsWell Hydraulics

Hydrobiology Hydrocarbons

Aliphatic HydrocarbonsAromatic HydrocarbonsChlorinated HydrocarbonsPetroleum Hydrocarbons

HydrochloricHydrochloric Acid

Hydrodynamics Hydroelectric

Hydroelectric PlantsHydroelectric Power

Hydrofoils Hydrogen

Hydrogen BondingHydrogen Ion ConcentrationHydrogen Sulfide

Hydrogenation Hydrogeology

Areal Hydrogeology

HydrographHydrograph Analysis

HydrographsComposite Unit HydrographsCompound HydrographsDaily HydrographsDischarge HydrographsFlood HydrographsUnit HydrographsWell Hydrographs

Hydrography Hydrologic

Hydrologic AspectsHydrologic BalanceHydrologic BasinsHydrologic BudgetHydrologic CycleHydrologic DataHydrologic Data CollectionsHydrologic EquationHydrologic MapsHydrologic ModelsHydrologic PropertiesHydrologic Systems

HydrologicalHydrological RegimeInternational Hydrological

Decade Hydrology

Agricultural HydrologyArid-zone HydrologyContinental HydrologyForest HydrologyGroundwater HydrologyKant HydrologyParametric HydrologyStochastic HydrologySynthetic Hydrology

, Urban Hydrology Hydrolysis Hydrometeorology Hydrometers Hydrometric

Hydrometric Stations Hydrometry Hydrophase

Hydrophase Diagrams Hydrophones Hydrophytes Hydroponics Hydrostatic

Hydrostatic LevelHydrostatic Pressure

HydrothermalHydrothermal Studies

HydroxideCalcium HydroxideMagnesium HydroxideSodium Hydroxide

Hyetographs Hygrometry Hygrophytes Hygroscopic

Hygroscopic CapacityHygroscopic CoefficientHygroscopic MoistureHygroscopic Water

Hyperfiltration Hypolimnion . Hypsometric

Hypsometric Analysis

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-13

Hysteresis (Cont) WATER RESOURCES THESAURUS

Hysteresis

leeAnchor IceBottom IceFloating IceFrazil IceGround IceIce BreakupIce CoverIce CrystalsIce DriftIce FogIce FormationIce GorgeIce JamsIce LensesIce LoadsIce PressureIce RunIce SkatingIce ThicknessIce-brine SystemsIce-water Interfaces,Interstitial IceLake IceNeedle IcePressure IceRotten IceScrew IceSea IceShale IceSubsurface IceWater-ice Interfaces

Icebergs Iced

Iced Lakes Icing

Highway Icing Ictalurus Identification

Pollutant IdentificationWaste Identification

Igneous ,Igneous Rocks

Illto Imagery

Infrared Imagery Immature

Immature Growth Stage Immiscibility Immunity

Sovereign Immunity Impact

Economic ImpactEnvironmental Impact

StatementRainfall ImpactSocial Impact

ImpairedImpaired Water QualityImpaired Water Use

Impedance Impellers Impervious

Impervious BedsImpervious BoundariesImpervious Membranes

Impervious Soils Import Imported

Imported Water Importing

Water Importing Impoundment

Early ImpoundmentLate Impoundment

Impoundments Improvement

Channel ImprovementStream ImprovementWater Yield Improvement

Inla Situ TestsIn-bank Capacity

Incineration Incised

Incised Rivers Income

Income Distribution Increment

Groundwater Increment Incubation Index

Antecedent Precipitation IndexFlow IndexInfiltration IndexMoisture IndexPollution IndexRainfall IndexSaturation IndexSludge Volume IndexZero Moisture Index

Indexing Indicators Indices .

Diversity Indices Indirect

Indirect BenefitsIndirect Flood Measurement

InducedInduced InfiltrationInduced Recharge

IndustrialIndustrial DevelopmentIndustrial Plants .Industrial ProductionIndustrial WastesIndustrial WastewaterIndustrial WaterIndustrial Water Use

IndustryChemical IndustryDairy IndustryDye Industry WastesElectric Power Industry- 'Food Processing IndustryLumber Industry .Meat Processing IndustryMineral IndustryOil IndustryPaper IndustryPetroleum IndustryPulp and Paper IndustrySteel Industry

Infection Infiltration

Induced InfiltrationInfiltration CapacityInfiltration Coefficient

Infiltration DiversionInfiltration IndexInfiltration RateInfiltration VelocityInfiltration WaterRainfall InfiltrationSewer Infiltration

Inflltrometers Inflow .

Channel Inflow. Influence

Influence Basins Influent

Influent SeepageInfluent StreamsInfluent Water

InformationInformation ExchangeInformation RetrievalInformation Systems

InfraredInfrared Imagery . .Infrared RadiationInfrared SpectrophotometryInfrared Spectroscbpy

Inhibition Inhibitors Initial

Initial Precipitation Injection

Injection Wells Injunctions Injunctive

Injunctive Relief ; Injury

Water Injury Inland

Inland Waterways Inlet

Inlet Wells Inlets Inorganic

Inorganic AcidsInorganic CompoundsInorganic Pesticides

InputInput WellsInput-output Analysis

InsectInsect BehaviorInsect Control

Insecticides -Insects

Aquatic Insects Inspection Installation Institutes

Water Resources Institutes Institutional

Institutional Constraints Institutions Instream

Instream AerationInstream Flow .

InstrumentsMeasuring InstrumentsPressure-measuring

InstrumentsSurveying Instruments

InsularInsular Slopes

InsulatedInsulated Streams

Insulation Insulators

Electrical Insulators Insurance Intake

Intake GatesWell Intake

Intakes Intangible

Intangible Benefits Intensity . .

Light IntensityPrecipitation IntensityRainfall Intensity

InteragencyInteragency Cooperation

Interbasin Interbasin Transfers

InterceptingIntercepting Channels.Intercepting Ditches

InterceptionInterception Loss

InterceptorInterceptor Sewers

InterdisciplinaryInterdisciplinary. Studies

InterestInterestiRates

Interfaces . . .Air-earth InterfacesAir-water InterfacesEarth-air Interfaces . .Earth-water InterfacesIce-water InterfacesMud-water InterfacesOil-water InterfacesSaline-freshwater Interfaces-Sediment-water InterfacesWater-air InterfacesWater-earth InterfacesWater-ice InterfacesWater-mud InterfacesWater-oil Interfaces.Water-sediment Interfaces

InterferenceChemical InterferenceIonic InterferenceRadio Interference

Interferometry Intermediate

Intermediate Water Intermittent

Intermittent FiltersIntermittent LakesIntermittent SpringsIntermittent Streams

InternalInternal WaterInternal Waves

International ,International AgreementsInternational CommissionsInternational Hydrological

DecadeInternational LawInternational Waters

InterpretationData Interpretation

DW-16 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS

Soil InterpretationInterrelations

Governmental InterrelationsInterrupted

Interrupted Streams Interrupted Water Table

Interstate Interstate Commissions Interstate Compacts Interstate Rivers

Interstice Interstitial

Interstitial Ice Interstitial Water

IntertidalIntertidal Areas

IntervalFlood Recurrence Interval

IntrusionSaline Water Intrusion

Inundation InventoriesInventory

Groundwater InventoryInvertebratesInverted

Inverted CapacityInverted Wells

InvestigationsField Investigations On-site Investigations

InvestmentPublic Investment

IodideSilver Iodide

IodidesIodine

Iodine Radioisotopes Ion

Hydrogen Ion ConcentrationIon ExchangeIon Exchange Resins Ion TransportIon-selective Electrodes

Ionic Ionic Interference

lonization Flame lonization Gas

ChromatographyIonsIron

Iron BacteriaIron Compounds Iron OxidesIron Radioisotopes

IrradiationIrrigable

Irrigable AreaIrrigable Land

IrrigationBasin IrrigationBorder Irrigation Broad Irrigation Check Irrigation Contour Irrigation Direct Irrigation Drip IrrigationFlood IrrigationFurrow IrrigationGroundwater IrrigationIrrigation Canals

Irrigation DesignIrrigation DistrictsIrrigation DitchesIrrigation Effects Irrigation Efficiency Irrigation Engineering Irrigation Operation Irrigation Permits Irrigation Potential Irrigation Practices Irrigation Programs Irrigation Requirements Irrigation Water Irrigation Wells Irrigation-return Flow Mist IrrigationSpray Irrigation Sprinkler IrrigationSubsurface IrrigationSupplemental IrrigationSurface Irrigation Trickle Irrigation Wastewater Irrigation

Islands Barrier Islands

IsohyetsIsolationIsopodsIsotherms Isotope

Isotope Fractionation Isotope Studies

IsotopesOxygen IsotopesStable Isotopes

IsotopicIsotopic Tracers

Isotropy Issues

Bond Issues

JJams

Ice Jams Jelly

Jelly Fish JetsJetsamJettiesJetting Joints

Construction Joints Geologic Joints

JudicialJudicial Decisions

JumpHydraulic Jump

JuniperJuniper Trees

Jurisdiction Federal Jurisdiction State Jurisdiction

JustificationEconomic Justification

JuvenileJuvenile Growth StageJuvenile Water

Kaolinite Kant

Karst Hydrology Kelps Kidneys Killifuh Kinematic

Kinematic Viscosity Kinematic Wave Theory Kinematic Waves

Kinetic Kinetic Energy

Kinetics Growth KineticsPesticide Kinetics

KjeldaMKjeldahl Procedure

Klebsiella Knoll

Knoll Springs Kraft

Kraft Mill WastesKraft Mills

KryptonKrypton Radioisotopes

LLabor

Labor UnionsLaboratories

On-site Laboratories Laboratory

Laboratory Animals Laboratory Equipment

LactobocillusLadders

Fish LaddenLagoons

Aerated Lagoons Anaerobic Lagoons Farm Lagoons Oxidation Lagoons Sludge LagoonsStabilization LagoonsWastewater Lagoons

LakeLake Basins Lake BedsLake Bottom Springs Lake BreezesLake CirculationLake ClassificationLake EvaporationLake FisheriesLake IceLake Morphology Lake Morphometry Lake Rehabilitation Lake Restoration Lake Sediments Lake ShoresLake SoilsLake Stages

LakesArtificial Lakes

Closed LakesCrescentic LakesCutoff LakesDry Lakes Dystrophic Lakes Ephemeral Lakes Eutrophic Lakes Evanescent Lakes Glacial Lakes Holomictic Lakes Horseshoe Lakes Iced Lakes Intermittent Lakes Loop Lakes Meromictic Lakes Mesotrophic Lakes Mountain LakesOligotrophic Lakes Oxbow LakesSaline LakesStrip Mine Lakes

Laminar Laminar Flow

LaminariaLamprey Land

Irrigable LandLand AcquisitionLand ApplicationLand Appraisals Land ClassificationLand Clearing Land Development Land Disposal Land FormingLand ManagementLand OwnershipLand ReclamationLand ResourcesLand Rights Land Spreading Land TenureLand Treatment Land UseLand Use ControlLand Use Planning Land ValuesRiparian Land

Landfills Sanitary Landfills

Lands Arid Lands Cultivated LandsFrail LandsPublic LandsSemiarid LandsSubmerged Lands Tide Lands

Landscaping LandslidesLaplace

Laplace EquationLarge

Large WatershedsLargemouth

Largemouth Bass Larvae Larval

Larval Growth Stage LarvicidesLASLasersLate

Late Impoundment

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-17

Latent (Cont.) WATER RESOURCES THESAURUS

LatentLatent Heat

LateralLateral Conveyance StructuresLateral Sewers

LatcritesLatitudinal

Latitudinal StudiesLaunching

Boat-launching RampsLaunderingLavaLaw

Civil LawCommon LawConstitutional LawDarcys LawHortons Law International LawLaw Enforcement Law of the Sea Stokes Law Water Law

LawnsLayer

Thin Layer ChromatographyLayers

Boundary LayersLeachatesLeaching Lead

Lead Radioisotopes Leaf

Leaf Water PotentialLeakage Leaky

Leaky AquifersLeaky Boundaries

LeasesLeast

Least Squares MethodLeaves Legal

Legal AspectsLegal Review

Legislation Legumes Lemna Lenses

Ice LensesLentic

Lentic Environment Leontief

Leontief Models LepomisLethal

Lethal LimitLettuce Levees

Natural LeveesLevel

Groundwater LevelHydrostatic Level Potentiometric Level Sea Level Trophic Level Water LevelWater Level FluctuationsWater Level Recorders

LevelsBackground Levels

Trace LevelsLiabilityLibrariesLicensesLicensingLichensLife

Aquatic LifeEconomic LifeHalf-lifeLife CyclesLife History StudiesRadioactive Half-life

LightLight IntensityLight PenetrationLight Quality

Lighthouses LightingLightning Lightweight

Lightweight Aggregates LigniteLineLimestoneLimit

Lethal LimitMedian Tolerance Limit

LimitationsEffluent Limitations

LimitingLimiting Factors Limiting Nutrients

LimitsAtterfoerg Limits Detection LimitsLiquid Limits

LimnologyLindaneLine

Bulkhead LineLinear

Linear Alkyl SulfonatesLinear Programming

Lines Phreatic Lines Seepage Lines Transmission Lines

LiningsCanal LiningsDitch Linings Reservoir Linings Tunnel Linings

Lipids LiquefactionLiquid

Gas Liquid ChromatographyLiquid Limits Liquid SludgeLiquid Wastes

LiquorMixed Liquor Solids

LiquorsBlack Liquors Spent Pulping Liquors Spent Sulfite Liquors Sulflte Liquors

ListingListing Basins

LiteratureLiterature Review

UnificationLithiumLithologic

Lithologic LogsLitter

Forest LitterLittoral

Littoral DriftLittoral EnvironmentLittoral Zone

LittorinaLive

Live StreamsLiverT l*lM9¥//V*a^l*t reafCICJv

LoadBed Load Bed-load DischargeBottom Load Load Distribution Pollution Load Sediment Load Silt LoadSuspended LoadTraction LoadWash LoadWaste Load

LoadingHydraulic LoadingLoading Rate Organic Loading

Loads Dead Loads Ice LoadsPeak Loads Shock Loads

LoamClay Loam

LoansLobstersLocal

Local Governments Local Precipitation

LocksLoessLogging

Core Logging Electrical Well Logging Logging (Recording) Neutron LoggingRadioactive Well Logging

Logs Drillers Logs Lithologic LogsWell Logs

Long-termLong-term Planning

LongshoreLongshore Currents

LOODM^Wff

Loop LakesLosing

Losing StreamsLoss

Absorption Loss Channel Loss Energy Loss Friction LossHead LossHydraulic LossInterception LossRiparian Water Loss

Seepage LossWater Loss

LossesDiversion Losses

LoticLotic Environment

LowLow FlowLow Water MarkLow-flow Augmentation

LubricantsLumber

Lumber IndustryLysimeters

MMachinery

Hydraulic Machinery Machines

Paper MachinesMacroinvertebratesMacrophytesMagmatic

Magmatic WaterMagnesium

Magnesium Carbonate Magnesium CompoundsMagnesium Hydroxide

Magnetic Magnetic StudiesNuclear Magnetic Resonance

MagnificationBiological Magnification

MainMain Sewers

MainsWater Mains

Maintenance Maintenance Costs

MaizeMaking

Decision Making Policy Making

Malathion MalenclavesMammalsManagement

Aquifer Management Coastal Zone ManagementCutting Management Environmental ManagementFarm ManagementFish ManagementFlood Plain Management Forest ManagementGroundwater Management Land ManagementManagement Planning Marsh ManagementMetropolitan Water

Management Pasture Management Personnel Management Planting ManagementRange ManagementReservoir ManagementResources ManagementSnow Management

DW-18 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Mining

Soil ManagementWaste ManagementWastewater ManagementWater ManagementWater Quality ManagementWatershed ManagementWildlife Management

ManganeseManganese Radioisotopes

MangroveMangrove Swamps

ManningsMannings Equation

Manometers Manpower Mantle

Snow Mantle Manufacturing

Manufacturing Wastes Manure Maple

Maple Trees Mapping

Geologic MappingSubsurface MappingTopographic Mapping

MapsHydrologic Maps

MarginContinental Margin

MarginalMarginal BenefitsMarginal Costs

Mariculture Marinas Marine

Marine AlgaeMarine AnimalsMarine BacteriaMarine BiologyMarine ClimatesMarine EnvironmentMarine FisheriesMarine GeologyMarine PlantsMarine ResourcesMarine Sediments

MarkHigh Water MarkLow Water Mark

MarketMarket Value

Marketing Marking

Marking Techniques Markov

Markov Process Marks

Ripple Marks Marl Marsh

Marsh ManagementMarsh Plants

MarshesCoastal MarshesSalt MarshesTidal Marshes

MassGlacier Mass BalanceMass ConcreteMass Spectra

Mass SpectrometryMass TransferMass Wasting

MassesAir Masses

MaterialsBuilding MaterialsConstruction MaterialsHazardous MaterialsMaterials EngineeringMaterials Testing

MathematicalMathematical AnalysisMathematical EquationsMathematical ModelsMathematical Studies

MatterDecomposing Organic MatterDissolved Organic MatterDry MatterOrganic MatterPaniculate MatterSoil Organic Matter

MatureMature Growth StageMature Rivers

MaximumMaximum Available WaterMaximum FlowMaximum Probable FloodsProbable Maximum

Precipitation Mayflies Meadows Meander

Meander Belt Meanders Measurement

Discharge MeasurementFlow MeasurementIndirect Flood MeasurementStrain MeasurementWater Measurement

MeasuringMeasuring InstrumentsPressure-measuring

Instruments Meat

Meat Processing Industry Mechanical

Mechanical ControlMechanical EngineeringMechanical EquipmentMechanical Failure

MechanicsFluid MechanicsRiver MechanicsRock MechanicsSoil Mechanics

MediaCulture MediaDual Media FiltersFilter MediaGrowth MediaPorous MediaSelective Media

MedianMedian Tolerance Limit

Medicago Medicinal

Medicinal Springs

Melosira Melt

Melt Water Melting Membrane

Membrane ElectrodesMembrane FiltersMembrane FoulingMembrane Processes

MembranesBiological MembranesCellulose Acetate MembranesImpervious MembranesPermselective MembranesSemipermeable Membranes

Menhaden Mercenaria Mercury Meromictic

Meromictic Lakes Meromixis Mesophytes Mesotrophic

Mesotrophic Lakes Mesotrophy Mesozoic

Mesozoic Era Mesquite Metabolism

Animal Metabolism Metabolites Metal

Metal ChelatesMetal ComplexesMetal Organic PesticidesMetal PipesMetal-finishing Wastes

Metallurgy Metals

Alkali MetalsAlkaline Earth MetalsHeavy MetalsTrace Metals

MetamorphicMetamorphic RocksMetamorphic Water

MeteoricMeteoric Water

MeteorologicalMeteorological Data

Collection Metering

Water Metering Meters

Current MetersMoisture MetersNuclear MetersNuclear Moisture MetersSoil Moisture MetersVenturi Meters

MethaneMethane Bacteria

Methanol Method

Approximation MethodFinite Element MethodHeat-capacity MethodLeast Squares MethodMonte Carlo MethodRelaxation MethodWinkler Method

MethodsConstruction Methods .Finite Difference MethodsGraphical MethodsStatistical Methods

Methoxychlor Methylation Methylmercury Metropolitan

Metropolitan AreasMetropolitan Water

Management Mice Microbial

Microbial Degradation Microbiological

Microbiological Studies Microclimate Microclimatology Microcystis Microenvironment Micrometeorology Microorganisms Micropterus Microscopic

Microscopic Analysis Microscopy

Electron Microscopy Microwaves Midges Migration

Fish Migration Mildews Milk Mill

Kraft Mill WastesMill DamsTextile Mill Wastes

MillsBoard MillsKraft MillsSaw MillsSulfite Mills

MineAcid Mine DrainageAcid Mine WaterCoal Mine WastesMine AcidsMine DrainageMine WastesMine WaterStrip Mine LakesStrip Mine Wastes

MineralMineral IndustryMineral SpringsMineral Water

Mineralization Mineralogy Minerals

Clay Minerals Mines

Coal MinesStrip Mines

MinimumMinimum Flow

MiningCoal MiningGroundwater MiningHydraulic MiningMining Engineering

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-19

Milling (Cont) WATER RESOURCES THESAURUS

Placer Mining Mink Minnows

Fathead Minnows Mist

Mist Irrigation Mites Miticides Mixed

Mixed ForestsMixed Liquor Solids

MixesConcrete Mixes

Mixing Mixolimnion Mode

Mode of Action Model

Model StudiesModel TestingStanford Watershed Model

ModelsAnalog ModelsComputer ModelsDeterministic ModelsHele-Shaw ModelsHydraulic ModelsHydrologic ModelsLeontief ModelsMathematical ModelsStatistical ModelsStochastic ModelsStructural ModelsWatershed Models

ModificationWeather Modification

ModulusYoungs Modulus

MohrMohr CircleMohr EnvelopeMohr Failure Theory

MoistureAntecedent MoistureAvailable MoistureFree MoistureHygroscopic MoistureMoisture AvailabilityMoisture ContentMoisture DeficiencyMoisture DensityMoisture EquivalentMoisture GradientMoisture IndexMoisture MetersMoisture ProbeMoisture ProfilesMoisture StressMoisture TensionMoisture UptakeNuclear Moisture MetersSoil MoistureSoil Moisture DeficiencySoil Moisture MetersSoil Moisture RetentionSoil-moisture TensionZero Moisture Index

Molds Mole

Mole Drainage Molecular

Molecular Structure

Molluscicides Mollusks Molybdenum Momentum

Momentum EquationMomentum Transfer

MonetaryMonetary BenefitsMonetary Returns

Monimolimnion Monitoring Monitors

Drill Monitors Monomolecular

Monomolecular Films Monopoly Monsoons Monte

Monte Carlo Method Monthly

Monthly Distribution Montmorillonite Monuron Moraines Morbidity Morphology

Channel MorphologyLake MorphologyPlant Morphology

MorphometryLake Morphometry

Mortality Mortar Mortlakes Mosquitoes Mosses Most

Most Probable Number Test Motivation Mountain

Mountain Lakes Mountains Mouth

River Mouth Movable

Movable Dams Movement

Groundwater Movement Muck

Muck Soils Mud

Mud FlatsMud SpringsMud WaveMud-water InterfacesWater-mud Interfaces

Mudflows Mugil Mulches Mulching Mullet Multieffect

Multieffect Distillation Multiobjective

Multiobjective Planning Multiphase

Multiphase Flow Multiple

Multiple Arch Dams

MultipurposeMultipurpose ProjectsMultipurpose Reservoirs

MultireservoirMultireservoir Networks

MultistageMultistage Flash Distillation

MultiuseMultiuse Reservoirs

MultivariateMultivariate Analysis

MunicipalMunicipal WastesMunicipal WastewaterMunicipal Water

Muscle Muskeg Muskrats Mussels Mycobacterium Myriophyllum Mytilus Myxobacteria

NNansen

Nansen Bottles National

Gross National ProductNational ParksNational Resource

Development Nations

United Nations Native

Native Water Natural

Natural FlowNatural Flow DoctrineNatural GasNatural LeveesNatural PurificationNatural RechargeNatural ResourcesNatural SlopeNatural StreamsNatural UseNatural Water TableNatural WatercoursesNatural WatersNatural Wells

NatureBalance of Nature

NavalNaval Architecture

Navicula Navigable

Navigable RiversNavigable Waters

NavigationNavigation CanalsNavigation ObstructionsNavigation ServitudeObstructions to Navigation

NeapNeap Tides

NearshoreNearshore Processes

NeedleNeedle DamsNeedle Ice

NeedsResearch NeedsSocial Needs

NegativeNegative Wells

Negligence Negotiations Nematodes Neritic

Neritic Environment Nesting Net

Net RadiationNet Rainfall

NetsFlow NetsFyke NetsGill NetsPlankton Nets

NettlesSea Nettles

NetworkNetwork Design

NetworksDrainage NetworksElectrical NetworksMultireservoir NetworksResistance Networks

Neutralization Neutron

Neutron AbsorptionNeutron Activation AnalysisNeutron Logging

NewNew Snow

Niches Nickel Nitella Nitrates Nitrification Nitrilotriacetic

Nitrilotriacetic Acid Nitrites Nitrogen

Nitrogen CompoundsNitrogen CycleNitrogen FixationNitrogen Fixing BacteriaNitrogen RemovalOrganic Nitrogen

Nitzschia Noise Nonconsumptive

Nonconsumptive Use Nondestructive

Nondestructive Tests Nonionic

Nonionic Surfactants Nonlinear

Nonlinear Programming Nonnavigable

Nonnavigable Waters Nonnewtonian

Nonnewtonian Flow Nonperennial

Nonperennial Streams Nonpoint

Nonpoint Pollution Sources

DW-20 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Paleozoic

NonstructuralNonstructural Alternatives

NontidalNontidal Currents

NonuniformNonuniform Flow

Nostoc Notropis Nozzles NTA Nuclear

Nuclear EnergyNuclear EngineeringNuclear ExplosionsNuclear Magnetic ResonanceNuclear MetersNuclear Moisture MetersNuclear PhysicsNuclear PowerplantsNuclear ReactorsNuclear Wastes

Nucleation Nuisance

Nuisance AlgaePublic Nuisance

NumberFroude NumberMost Probable Number TestReynolds NumberWeber Number

NumericalNumerical Analysis

NutrientNutrient RemovalNutrient Requirements

NutrientsCycling NutrientsEssential NutrientsLimiting Nutrients

Nutrition Nuts

OOak

Oak Trees Oats Objective

Objective Function Objects

Flow Around Objects Observation

Observation Wells Obstruction

Flow ObstructionObstruction to Flow

ObstructionsNavigation ObstructionsObstructions to Navigation

Occupations Ocean

Ocean BottomOcean CirculationOcean ClimatesOcean CurrentsOcean DisposalOcean DumpingOcean Waves

OceanographyBiological Oceanography

Ochromonas Odor

Odor ControlOdor-producing Algae

Odors Offshore

Offshore Platforms Oil

Bunker OilCrude OilDiesel OilFuel OilOil CharacterizationOil FieldsOil IndustryOil PollutionOil RecoveryOil RefineriesOil ReservoirsOil ShaleOil SkimmersOil SlicksOil SpillsOil TankersOil WastesOil WellsOil-water InterfacesSecondary Oil RecoveryWater-oil Interfaces

OilseedOilseed Crops

OilyOily Water

OldOld Snow

Oligochaetes Oligotrophic

Oligotrophic Lakes Oligotrophy On-site

On-site Data CollectionsOn-site InvestigationsOn-site LaboratoriesOn-site Tests

Oncorhynchus Onions Ooze Opacity Open

Open ChannelsOpen SpaceOpen WellsOpen-channel DrainageOpen-channel Flow

OperatingOperating CostsOperating Policies

OperationIrrigation OperationOperation WastesReservoir Operation

OperationsCleanup Operations

OpinionPublic Opinion

OpportunitiesEmployment Opportunities

OpportunityOpportunity Costs

OpticalOptical Properties

OptimalOptimal Yield

OptimalityPareto Optimality

Optimization Optimum

Optimum Development Plans Orchardgrass Orchards Order

Stream Order Ordinances Organic

Decomposing Organic MatterDissolved Organic MatterMetal Organic PesticidesOrganic AcidsOrganic CarbonOrganic CompoundsOrganic LoadingOrganic MatterOrganic NitrogenOrganic PesticidesOrganic SoilsOrganic SolventsOrganic WastesSoil Organic MatterTotal Organic Carbon

Organisms,Fish Food Organisms

Organizations Organoleptic

Organoleptic Properties Organophosphorus

Organophosphorus Compounds

Organophosphorus Pesticides Orifice

Orifice Flow Orifices Ornamentals Orographic

Orographic Precipitation Orography Orthophosphates Oscillatoria Oscillatory

Oscillatory Waves Osmosis

Electro-osmosisReverse OsmosisThermo-osmosis

OsmoticOsmotic Pressure

Ostracods Otters Ouedd Outdoor

Outdoor Recreation Outer

Outer Banks Outfall

Outfall SewersWastewater Outfall

OutletOutlet Channels

Outlets Output

Input-output Analysis

OutwashOverburdenOverdraftOverfallsOverflow

Overflow ChannelsStorm-overflow Sewers

OverflowsCombined Sewer Overflows

OverlandOverland Flow

OverlyingOverlying Proprietor

OwnershipLand OwnershipOwnership of Beds

OxbowOxbow Lakes

OxidationBiological OxidationChemical OxidationOxidation DitchesOxidation LagoonsOxidation PondsOxidation Process ;Oxidation-reduction PotentialWastewater OxidationWet Air OxidationWet Oxidation Process

OxidesIron Oxides

OxidizedOxidized Wastewater

OxygenBiochemical Oxygen DemandBiological Oxygen DemandChemical Oxygen DemandDissolved OxygenOxygen BalanceOxygen ConsumptionOxygen DeficitOxygen DemandOxygen DepletionOxygen IsotopesOxygen RequirementsOxygen SagOxygen TransferOxygen UptakePhotosynthetic OxygenResidual OxygenTotal Oxygen Demand

Oxygenation Oysters Ozonation Ozone

PackedPacked Beds

PackingGravel Packing

Paleoclimatology Paleohydrology Paleolimnology Paleosols Paleozoic

Paleozoic Era

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-21

Palynology (Cont.) WATER RESOURCES THESAURUS

PalynologyPan

Pan Evaporation Pans

Evaporation Pans Salt Pans

Paper Paper Industry Paper Machines Pulp and Paper IndustryWaste Paper

ParametricParametric Hydrology

Paraquat Parasites

Animal Parasites Fish Parasites

Parasitism ParathionPareto

Pareto Optimality Parks

National ParksPartial

Partial DiversionPartially

Partially Penetrating WejlsParticipating

Participating Funds Participation

Citizen Participation Public Participation Social Participation

ParticleParticle ShapeParticle Size

PaniculatePaniculate Matter

Passages Fish Passages

PasturePasture Management

PasturesPatentsPath

Path of Pollutants Pathogenic

Pathogenic BacteriaPathogenic Fungi

Pathogens Pathology

Animal Pathology N Human PathologyPlant Pathology

PatternFlow Pattern

PatternsDistribution PatternsDrainage PatternsWeather Patterns

PavingPaymentPeachesPeak

Flood PeakPeak DemandPeak DischargePeak FlowPeak Loads

PeakingPeaking Capacity

PeanutsPeat

Peat Bogs Peat Soils

Pectinatus Potamogeton Pectinatus

Pellicular Pellicular Water Pellicular Zone

PenaeusPendular

Pendular WaterPenetrating

Fully Penetrating Wells Partially Penetrating Wells

Penetration Light PenetrationRainfall Penetration

PensConfinement Pens

Penstocks PeptidesPercaPerchPerched

Perched Aquifers Perched GroundwaterPerched HorizonPerched Springs Perched Streams Perched Water Perched Water Table

PercolatingPercolating FiltersPercolating Water

PercolationDeep PercolationPercolation Rate

PerennialPerennial Ryegrass Perennial Springs Perennial Streams

PerformancePerformance Evaluation

PeridiniumPerlitePermafrost Permanent

Permanent StreamsPermeability

Coefficient of Permeability Fracture Permeability Hydraulic Permeability Permeability CoefficientSurface Permeability

PermeametersPermits

Fill PermitsIrrigation PermitsWater PermitsWell Permits

PermselectivePermselective Membranes

PersonnelEngineering PersonnelPersonnel ManagementProfessional PersonnelScientific Personnel

PerviousPervious Soils

PesticidePesticide Drift

Pesticide KineticsPesticide ResiduesPesticide Toxicity

PesticidesCarbamate Pesticides Halogenated Pesticides Inorganic Pesticides Metal Organic Pesticides Organic Pesticides Organophosphorus Pesticides Phenolic PesticidesPhosphothioate Pesticides Thiocarbamate PesticidesTriazine PesticidesUrea Pesticides

Petrofabrics Petrography Petroleum

Petroleum Hydrocarbons Petroleum IndustryPetroleum Products

Petrology Sedimentary Petrology

_ TTpHPhaeodactylumPhaeophytaPhase

Phase DiagramsTwo-phase Flow

Phelps Streeter-Phelps Equation

Phenolic Phenolic Pesticides

PhenologyPhenolsPhone

Water PhonePhosphate

Phosphate RemovalPhosphates Phosphorus

Phosphorus CompoundsPhosphorus RadioisotopesPhosphorus Removal

PhosphothioatePhosphothioate Pesticides

Photoactivation Photogrammetry Photography

Aerial Photography Photometry

Flame Photometry Photooxidation PhotoperiodismPhotosynthesisPhotosynthetic

Photosynthetic BacteriaPhotosynthetic Oxygen

PhototropismPhreatic

Phreatic LinesPhreatic WaterPhreatic Waves

PhreatophytesPhylogenyPhysical

Physical AnalysisPhysical ControlPhysical PropertiesSoil Physical Properties

PhysicochemicalPhysicochemical Properties

Physicochemical TreatmentPhysics

Atmospheric Physics Cloud PhysicsNuclear Physics Soil Physics

Physiographic Physiographic Balance Physiographic Provinces

PhysiologicalPhysiological Ecology

PhysiologyAnimal PhysiologyBacterial Physiology Fish Physiology Human Physiology Plant Physiology

PhytometersPhytoplanktonPhytotoxicityPiers Piezometers Piezometric

Piezometric HeadPiezometryPigments

Plant Pigments PikeJL I/VC

Pile Wave Pile-up

Piles Foundation Piles

PillowsSnow Pillows

PilotPilot Plants

PinePine Trees

Pinus Pipe

Pipe FlowPipelinesPipes

Concrete PipesMetal PipesPlastic Pipes Steel Pipes

Piscicides Pit

Pit Recharge Pits

Borrow Pits Seepage Pits

PittingPlacer

Placer MiningPlaicePlain

Flood Plain ManagementFlood Plain Zoning

PlainsAlluvial PlainsCoastal PlainsFlood Plains

PlanePlane FlowWater Plane

PlanktonPlankton Nets

PlanningAlternative Planning

DW-22 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Pressure

Comprehensive PlanningFuture PlanningLand Use PlanningLong-term PlanningManagement PlanningMultiobjective PlanningProject PlanningRegional PlanningShort-tenn PlanningUrban Planning

PlansOptimum Development Plans

PlantPlant CommunitiesPlant DiseasesPlant FibersPlant GrowthPlant Growth SubstancesPlant MorphologyPlant PathologyPlant PhysiologyPlant PigmentsPlant PopulationsPlant TissuesPlant VirusesPlant Water PotentialSoil-water-plant Relationships

PlantingPlanting Management

PlantsAmphibious PlantsAquatic PlantsBleach PlantsConcrete PlantsDesalination PlantsDesert PlantsDual Purpose PlantsFloating PlantsHydroelectric PlantsIndustrial PlantsMarine PlantsMarsh PlantsPilot PlantsPumping PlantsRooted Aquatic PlantsSubmerged PlantsTreatment Plants

PlasticPlastic Pipes

Plasticity Plastics Platforms

Offshore Platforms Plating

Plating Wastes Platyhelminthes Playas Plerotic

Plerotic GroundwaterPlerotic Water

PlotRunoff Plot

PlugPlug Flow

Plumbing Plumes

Thermal Plumes Plutonic

Plutonic Water Plutonium Pocket

Pocket SpringsPocket Storage

Podzols Point

Wilting Point Poised

Poised RivenPoised Streams

Poisons Poisson

Poisson Ratio Polar

Polar Regions Polarity Polarization Polarographic

Polarographic Analysis Polders Police

Police Power Policies

Operating Policies Policy

Environmental PolicyPolicy MakingPublic PolicyWater Policy

PoliticalPolitical AspectsPolitical Constraints

Pollen Pollutant

Pollutant Identification Pollutants

Fate of PollutantsPath of Pollutants

PollutionAir PollutionAir Pollution EffectsAtmospheric PollutionGroundwater PollutionNonpoint Pollution SourcesOil PollutionPollution AbatementPollution ControlPollution EffectsPollution IndexPollution LoadPollution PreventionPollution SourcesPollution TaxesStream PollutionThermal PollutionWastewater PollutionWater PollutionWater Pollution ControlWater Pollution EffectsWater Pollution PreventionWater Pollution SourcesWater Pollution Treatment

Polychaetes Polychlorinated

Polychlorinated Biphenyls Polyelectrolytes Polymers Pondage Ponded

Ponded Streams Ponding Ponds

Aerated PondsCatfish PondsCooling PondsFarm Ponds

Fish PondsHolding PondsOxidation PondsRecharge PondsStabilization Ponds

PondweedSago Pondweed

Pontoons Pools

Swimming Pools Population

Human PopulationPopulation DensityPopulation DynamicsPopulation EquivalentsPopulation ExposurePopulation Growth

PopulationsAnimal PopulationsAquatic PopulationsFish PopulationsPlant Populations

Populus Pore

Pore PressurePore SizePore Water

Pores Porosity

Effective PorositySoil Porosity

PorousPorous Media

PortPort AuthoritiesPort Facilities

PortlandPortland Cements

PossessionAdverse Possession

Postimpoundment Potable

Potable Water Potamogeton

Potamogeton Pectinatus Potash Potassium

Potassium CompoundsPotassium Radioisotopes

PotatoesSweet Potatoes

PotentialChemical PotentialElectric PotentialEvapotranspiration PotentialGroundwater PotentialIrrigation PotentialLeaf Water PotentialOxidation-reduction PotentialPlant Water PotentialPotential EvaporationPotential FlowPotential Water SupplySoil Water PotentialVelocity PotentialZeta Potential

PotentialsWater Potentials

Potentiometers Potentiometric

Potentiometric Level

PotholesPoultryPower

Electric PowerElectric Power CostsElectric Power DemandElectric Power FailureElectric Power IndustryElectric Power ProductionElectric Power RatesGeothermal PowerHydroelectric PowerPolice PowerPower HeadPower Transformers :Proprietary PowerThermal Power

PowerplantsElectric PowerplantsNuclear PowerplantsThermal Powerplants .,. .Tidal PowerplantsUnderground Powerplants

Pozzoians Practices

Drainage PracticesForeign Design PracticesIrrigation Practices

Prairies Pre-treatment

Pre-treatment Standards Precambrian

Precambrian Era Precast

Precast Concrete Precipitation

Antecedent Precipitation IndexAreal PrecipitationArtificial PrecipitationAtmospheric PrecipitationChemical PrecipitationChemistry of Precipitation 'Convective PrecipitationCyclonic Precipitation ,Effective PrecipitationInitial PrecipitationLocal PrecipitationGeographic PrecipitationPrecipitation ExcessPrecipitation GagesPrecipitation IntensityPrecipitation RatePrecipitation ScavengingProbable Maximum

Precipitation Precision Predation Prediction

Economic Prediction Preimpoundment Preparation

Sample Preparation Prescriptive

Prescriptive Rights Present

Present Value Preservation

Sample Preservation Pressure

Artesian PressureAtmospheric Pressure ., Earth PressureHigh Pressure

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-23

Pressure (Cent) WATER RESOURCES THESAURUS

High Pressure GatesHydrostatic PressureIce PressureOsmotic PressurePore PressurePressure ConduitsPressure DistributionPressure HeadPressure IcePressure-measuring

InstrumentsSoil PressureUplift PressureVapor PressureWater PressureWind Pressure

PressurizedPressurized Water Reactors

PrestressedPrestressed Concrete

PretreatmentPretreatment of Water

Prevention

Zeolite ProcessProcesses

Boundary Processes Hydrate Processes Membrane Processes Nearshore Processes Solids Contact Processes

Processing Data Processing Food Processing Industry Food-processing Wastes Meat Processing Industry

ProducingOdor-producing Algae Taste-producing Algae

Product Gross National Product

Production Crop Production Electric Power Production Industrial Production

Productivity Aquatic Productivity

Hydraulic PropertiesHydrologic PropertiesOptical PropertiesOrganoleptic PropertiesPhysical PropertiesPhysicochemical PropertiesRock PropertiesSeismic PropertiesSoil Physical PropertiesSoil PropertiesThermal PropertiesWater Properties

PropertyProperty, BoundariesProperty RightsProperty ValueReal Property

ProprietaryProprietary Power

ProprietorOverlying Proprietor

Prospecting

Pumpage Pumped

Pumped Storage Pumping

Pumping HeadPumping PlantsPumping Tests

PumpsSubmersible Pumps

PurePure Cultures

PurificationNatural PurificationSelf-purificationWastewater PurificationWater Purification

PurposeDual Purpose Plants

Pyrite Pyrrophyta

Flood Prevention Frost Prevention. Pollution Prevention Scale PreventionWater Pollution Prevention

Prices Pricing Primary

Primary Productivity Primary Sludge Primary Wastewater

Treatment Primary Waves

PrincipalPrincipal Component Analysis

PrioritiesResearch Priorities

PrismTidal Prism

ProbabilisticProbabilistic Process

Probability Probability Distribution

Probable Maximum Probable Floods Most Probable Number TestProbable Maximum

PrecipitationProbe

Moisture ProbeProbes

Soil Density Probes Procedure

Adjudication Procedure Kjeldahl Procedure

Procedures Testing Procedures

Process Activated Sludge Process Contact Stabilization Process Fluidized Bed Process Markov Process Oxidation Process Probabilistic Process Process ControlProcess WaterStationary ProcessStochastic ProcessWet Oxidation Process

Comparative Productivity Primary Productivity Secondary Productivity

ProductsDegradation Products Petroleum Products

Professional Professional Personnel Professional Societies

Profiles Beach Profiles Flood Profiles Flow Profiles Hydraulic ProfilesMoisture ProfilesSoil ProfilesStream ProfilesWater Surface ProfilesWater Table Profiles

n n fferrojitProgramming

Dynamic Programming Linear Programming Nonlinear Programming

Programs Computer ProgramsDrainage ProgramsIrrigation Programs

ProgressiveProgressive Taxes

ProjectProject Benefits Project Planning Standard Project Flood

Projections Projects

Foreign Projects Multipurpose Projects

Propagation Wave Propagation

Propane Propellers Properties

Biological Properties Chemical PropertiesConcrete PropertiesDielectric PropertiesElastic PropertiesElectrical Properties

vjiuuuuwoici riuapckung

Protection Bank Protection Environmental ProtectionFlood Protection Frost Protection Shore Protection Slope Protection Watershed Protection

Proteins Proteus Prototype

Prototype Tests PrototypesProtozoaProvenanceProvinces

Physiographic ProvincesPseudomonasPublic

Public AccessPublic Benefits Public Health Public Hearings Public Investment Public LandsPublic NuisancePublic OpinionPublic ParticipationPublic PolicyPublic RelationsPublic Rights Public Trust Doctrine Public Utility Districts Public Waters

Publications Puddling Pulp

Pulp and Paper Industry Pulp Washing Pulp Wastes

Pulping Spent Pulping Liquors

Pulsating Pulsating Springs

PumpPump TestingPump TurbinesPump Wells

QQuality

Environmental ̂ Quality Impaired Water Quality Light Quality Quality Control Water Quality Water Quality Control Water Quality Criteria Water Quality Data Water Quality Management Water Quality Standards

QuantitativeQuantitative Analysis

QuantityWater Quantity

QuarriesQuartzQuercusQueueing

Queueing Theory Quick

Quick Clays

R'

Rabbitbush Racks

Trash Racks Radar Radial

Radial Gates Radial Wells

Radiation Background Radiation Gamma Radiation Infrared Radiation Net Radiation Solar Radiation Thermal RadiationUltraviolet Radiation

RadioRadio InterferenceRadio Waves

DW-24 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Reprocessing

Radioactive Radioactive Dating Radioactive Half-life Radioactive Springs Radioactive Tracers Radioactive Waste Disposal Radioactive Wastes Radioactive Well Logging

Radioactivity Radioactivity Effects Radioactivity Techniques

Radiochemical Radiochetnical Analysis

RadioecologyRadioisotopes

Arsenic Radioisotopes Cadmium Radioisotopes Carbon Radioisotopes Cerium Radioisotopes Cesium Radioisotopes Chlorine Radioisotopes Chromium Radioisotopes Cobalt Radioisotopes Gold Radioisotopes Iodine Radioisotopes Iron Radioisotopes Krypton Radioisotopes Lead Radioisotopes Manganese Radioisotopes Phosphorus Radioisotopes Potassium Radioisotopes Radium Radioisotopes Rubidium Radioisotopes Ruthenium Radioisotopes Strontium Radioisotopes Uranium Radioisotopes Yttrium Radioisotopes Zinc Radioisotopes

RadiometryRadiosondesRadium

Radium RadioisotopesRadius

Hydraulic RadiusRailroadsRain

Acid Rain Rain Forests Rain Gages

RaindropsRainfall

Excess Rainfall Net Rainfall Rainfall Area Rainfall Disposition Rainfall Distribution Rainfall Impact Rainfall Index Rainfall Infiltration Rainfall Intensity Rainfall Penetration Rainfall Rate Rainfall Simulators Rainfall-runoff Relationships Simulated Rainfall

RainstormsRamps

Boat-launching RampsRange

Range Grasses Range Management Tidal Range

Rapid Rapid Excavation

Rapid Flow Rare

Rare Earth Elements Rate

Drilling RateEvaporation RateFilter RateInfiltration RateLoading RatePercolation RatePrecipitation RateRainfall RateRate of Return

. Sewage Rate Rates

Application RatesDeposition RatesDiscount RatesElectric Power RatesErosion RatesFeeding RatesFlow RatesGrowth RatesInterest RatesRunoff RatesSedimentation RatesTax RatesWater Rates

RatingRating Flumes

RatioBowen RatioCost-benefit RatioPoisson RatioStorage RatioTranspiration RatioVoid Ratio

RationalRational Formula

Ravinement Ravines Raw

Raw WastewaterRaw Water

RayX-ray DiffractionX-ray FluorescenceX-ray Spectroscopy

RaysX-rays

Reach Reactions

Chemical Reactions Reactors

Boiling Water ReactorsBreeder ReactorsNuclear ReactorsPressurized Water Reactors

Reagents Real

Real Property Reasonable

Reasonable Use Recession

Groundwater RecessionRecession Curve

RechargeArtificial RechargeGroundwater RechargeInduced RechargeNatural RechargePit Recharge

Recharge BasinsRecharge PondsRecharge Wells

RecircvlatedRecirculated Water

ReclaimedReclaimed Water

ReclamationLand ReclamationSoil ReclamationWastewater ReclamationWater Reclamation

RecordersWater Level Recorders

RecordingLogging (Recording)

RecordsSurface Water RecordsWater Records

RecoveryChemical RecoveryOil RecoverySecondary Oil RecoveryWaste Recovery

RecreationOutdoor RecreationRecreation DemandRecreation FacilitiesRecreation Wastes

RecurrenceFlood Recurrence Interval

Recycling Red

Red Tide Redevelopment

. Area Redevelopment Reduction

Acetylene ReductionChemical ReductionOxidation-reduction Potential

Reefs Refineries

Oil Refineries Refinery

Refinery Wastes Reflectance Reforestation Refraction

Wave Refraction Refractivity Refrigeration Regenerated

Regenerated Water Regeneration Regime

Hydrological RegimeRegime ChannelsRegime Streams

Regimen Regional

Regional AnalysisRegional DevelopmentRegional FloodsRegional Planning

RegionsAlpine RegionsCold RegionsPolar RegionsTropical Regions

RegressionRegression Analysis

RegressiveRegressive Taxes

RegrowthVegetation Regrowth

RegulatedRegulated Flow

RegulationsAdministrative RegulationsBoating RegulationsRiver RegulationsWell Regulations

RegulatorsFlow Regulators

RehabilitationLake Rehabilitation

ReinforcedReinforced Concrete

RejectionSalt Rejection

RelationsEmployee RelationsGroundwater-suiface RelationsPublic RelationsStage-discharge RelationsSurface-groundwater Relations

RelationshipsRainfall-runoff RelationshipsSoil-water-plant Relationships

RelativeRelative HumidityRelative Rights

RelaxationRelaxation Method

ReleasesDye ReleasesReservoir Releases

ReliefInjunctive ReliefRelief SewersRelief Wells

RelocationHighway Relocation

Remedies Remote

Remote ControlRemote Sensing

RemovalColor RemovalNitrogen RemovalNutrient RemovalPhosphate RemovalPhosphorus RemovalSnow Removal

RenewalUrban Renewal

RenovationWastewater Renovation

RentEconomic Rent

Repairing Repayment

Cost Repayment Repellent

Water Repellent Soils Repellents Replenishment Representative

Representative Basins Reprocessing

Fuel Reprocessing

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS" DW-2S

Reproducibility (Coot) WATER RESOURCES THESAURUS

ReproducibilityRepulsionRequirements

Irrigation RequirementsNutrient RequirementsOxygen RequirementsStorage RequirementsWater Requirements

ResearchForeign ResearchResearch FacilitiesResearch NeedsResearch Priorities

ReservationReservation Doctrine

ReservoirReservoir CapacityReservoir ConstructionReservoir DepositionReservoir DesignReservoir EvaporationReservoir FisheriesReservoir LiningsReservoir ManagementReservoir OperationReservoir ReleasesReservoir SiltingReservoir SitesReservoir SitingReservoir StagesReservoir StorageReservoir Yield

ReservoirsBalancing ReservoirsClear-water ReservoirsCompensating ReservoirsDetention ReservoirsDistribution ReservoirsEqualizing ReservoirsFiltered-water ReservoirsGroundwater ReservoirsMultipurpose ReservoirsMultiuse ReservoirsOil ReservoirsRetarding ReservoirsStorage Reservoirs

ResidualResidual ChlorineResidual OxygenResidual Soils

ResiduesPesticide Residues

ResinsEpoxy ResinsIon Exchange Resins

ResistanceCold ResistanceDrought ResistanceFlow ResistanceHeat ResistanceResistance Networks

Resistivity Resonance

Nuclear Magnetic Resonance Resource

National Resource Development

Resource Allocation Resources

Allocation of ResourcesGeothermal ResourcesLand ResourcesMarine Resources

Natural ResourcesResources DevelopmentResources ManagementWater Resources DevelopmentWater Resources Institutes

Respiration Respirometry

Warburg Respirometry Restoration

Lake Restoration Retaining

Retaining Walls Retardance Retardants Retarded

Retarded Flow Retarding

Retarding BasinsRetarding Reservoirs

RetentionRetention BasinsRetention CapacityRetention TimeSoil Moisture RetentionSpecific Retention

RetrievalData Storage and RetrievalInformation Retrieval

ReturnIrrigation-return FlowRate of ReturnReturn RowReturn Water

ReturnsMonetary Returns

ReuseWater Reuse

Revegetation Revenues Reverse

Reverse Osmosis Review.

Legal ReviewLiterature Review

Reviews Reynolds

Reynolds Number Rheology Rheotropism Rhizosphere Rhodophyta Rhyolites

Riddance Ridging Riffles Right

Right-of-wayUsufructuary Right

RightsLand RightsPrescriptive RightsProperty RightsPublic RightsRelative RightsRiparian RightsWater Rights

RigidRigid Foundations

Rigidity Rill

Rill Erosion Rills Rime Rinse

Rinse Water Rip

Rip Currents Riparian

Riparian Land .Riparian RightsRiparian VegetationRiparian Water LossRiparian Waters

RippleRipple Marks

Riprap Rise .

Water Table Rise Rising

Rising Stage Risks River

River Basin DevelopmentRiver BasinsRiver BedsRiver RowRiver ForecastingRiver MechanicsRiver MouthRiver RegulationsRiver SystemsRiver TrainingRiver Wash

RiversAdolescent RiversAggrading RiversAlluvial RiversBraided RiversBuried RiversIncised RiversInterstate RiversMature RiversNavigable RiversPoised RiversTidal RiversWild RiversYoung Rivers

Roach Road

Road Construction Roadbanks Roads Rock

Rock BoltsRock ExcavationRock FillRock GlaciersRock MechanicsRock PropertiesRock Slope StabilityRock Testing

RockflllRockfill Dams

RocksCarbonate RocksConglomerate RocksCrystalline RocksFoundation RocksIgneous RocksMetamorphic Rocks

Sedimentary Rocks Rockslides Rodenticides Rodents Rolled

Rolled-earth Dams Roller

Roller Gates Rolling

Rolling Dams Root

Root DevelopmentRoot DistributionRoot SystemsRoot Zone

RootedRooted Aquatic Plants

Roots Rotary

Rotary Drilling Rotational

Rotational Row Rotenone Rotifers Rotors Rotten

Rotten Ice Roughness ,

Coefficient of RoughnessHydraulic RoughnessRoughness Coefficient

RoutesAccess Routes

RoutingRood Routing

Royalties Rubber Rubidium

Rubidium Radioisotopes Ruminants Run

Ice Run Running

Running Waters Runoff

Agricultural RunoffAnnual RunoffBase RunoffCumulative RunoffFeedlot RunoffGroundwater RunoffRainfall-runoff RelationshipsRunoff CoefficientRunoff CycleRunoff ForecastingRunoff PlotRunoff RatesRunoff VolumeStorm RunoffSubsurface RunoffSurface RunoffUrban Runoff

RunupWave Runup

Rupturing Rural

Rural AreasRural Sociology

RutheniumRuthenium Radioisotopes

DW-26 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Sewage

RutilusRyegrass

Perennial Ryegrass

sSafe

Safe Yield ; Safety Sag

Oxygen SagSagebrush Sago

Sago Pondweed Sagponds SalamandersSolar

Salmo Salar Saline

Saline Aquifers Saline Lakes Saline Soils Saline Water Saline Water Barriers Saline Water Intrusion Saline Water SystemsSaline-freshwater Interfaces

SalinitySalinity CurrentsSoil Salinity

Salmo Salmo Salar Salmo Trutta

SalmonSalmonellaSalt

Salt BalanceSalt FlatsSalt MarshesSalt Pans Salt Rejection Salt Tolerance Salt Water

SaltationSalts

Ammonium SaltsSalvage

Salvage Value Salvaged

Salvaged Water Salve linusSample

Sample PreparationSample Preservation

SamplerSediment Sampler

SamplersSnow Samplers

SamplesBiological SamplesDrilling Samples

SamplingBottom SamplingSnow SamplingWater Sampling

SandSand AquifersSand Boils

Sand FiltersSand Waves

SandbarsSandpitsSands

Dune SandsSandspits SandstonesSanitary

Sanitary Engineering Sanitary Landfills Sanitary Wastewater

SanitationEnvironmental Sanitation

Saprophytic Saprophytic Bacteria

Satellite Satellite Technology

SatellitesEarth Satellites Weather Satellites

SaturatedSaturated Row Saturated Soils

Saturation Boundary of Saturation Saturation Deficit Saturation Index Saturation ZoneSoil Saturation

SausageSausage Dams

Savings Cost Savings

Saw Saw Mills

SawdustScale

Diseconomies of ScaleEconomies of ScaleScale Prevention

ScalingScarcity

Water Scarcity Scavenging

Precipitation ScavengingScenedesmus SceneryScheduling Science

Soil Science Scientific

Scientific PersonnelScirpus Scour

Channel Scour Scouring

Wool ScouringScreened

Screened WellsScreens

Well ScreensScrew

Screw IceScuba

Scuba DivingSculpinScumSea

Law of the Sea

Sea BreezesSea GrassesSea IceSea LevelSea NettlesSea UrchinsSea Walls

SealantsSoil Sealants

Sealing Surface Sealing

Seals SeashoresSeasonal

Seasonal Depletion Seasonal Distribution Seasonal Storage Seasonal Streams Seasonal Variation

SeawaterSeaweeds Secchi

Secchi Disks Secondary

Secondary Oil Recovery Secondary Productivity Secondary Wastewater Secondary Wastewater

TreatmentSections

Cross-sectionsSediment

Bed Sediment Sediment Concentration Sediment Control Sediment Discharge Sediment Distribution .Sediment ErosionSediment GradingSediment LoadSediment SamplerSediment SortingSediment TransportSediment Yield Sediment-carrying Capacity Sediment-water Interfaces Water-sediment Interfaces

SedimentarySedimentary Basins Sedimentary PetrologySedimentary Rocks Sedimentary Structures

Sedimentation Consolidation Sedimentation Sedimentation Basins Sedimentation Rates

SedimentologySediments

Bottom Sediments Fluvial SedimentsGlacial SedimentsLake SedimentsMarine SedimentsSuspended Sediments

SeedSeed Treatment

SeedingCloud SeedingSludge Seeding

SeedlingsSeedsSeep

Seep Water

SeepageCanal SeepageDeep SeepageEffluent SeepageInfluent SeepageSeepage ControlSeepage Lines Seepage LossSeepage PitsSeepage Springs Storm Seepage Well Seepage

SeepsSeichesSeismic

Seismic Properties Seismic Waves

Seismographs Seismology Selection

Site Selection Selective

Ion-selective Electrodes Selective Media Selective Withdrawal

Selectivity Selenastrum Selenium Self-purificationSemiarid

Semiarid ClimatesSemiarid Lands

Semipermeable Semipermeable Membranes

Sensing Remote Sensing

SensitivitySensitivity Analysis

SensorsSeparated

Separated SewersSeparation

Flow Separation Foam Separation Separation Techniques Sewer Separation

SepticSeptic Sludge Septic TanksSeptic Wastewater

Series Time Series Analysis

Serratia Servitude

Navigation ServitudeSestonSettleable

Settleable SolidsSettlement

Structural SettlementSettling

Settling BasinsSettling TanksSettling Velocity

SetupWind Setup

SewageSewage BacteriaSewage ChargeSewage DisposalSewage Districts

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-27

Sewage (Cont.) WATER RESOURCES THESAURUS

Sewage GasSewage RateSewage SystemsSewage Treatment Sewage Works Storm Sewage

Sewer Combined Sewer Overflows Sewer DistrictsSewer Gas Sewer Hydraulics Sewer Infiltration Sewer SeparationSewer Systems Trunk Sewer

SewerageSewers

Branch Sewers Combined SewersDepressed SewersInterceptor Sewers Lateral Sewers Main Sewers Outfall Sewers Relief Sewers Separated Sewers Storm Sewers Storm-overflow Sewers

ShadShafts Shale

Oil Shale Shale Ice

ShalesShallow

Shallow Water Shallow Wells

ShapePanicle Shape

SharingCost Sharing

SharkShaw

Hele-Shaw Models Shear

Shear Drag Shear StrengthShear StressShear Tests

SheepSheet

Sheet ErosionSheet Flow

ShelfContinental Shelf

ShellfishShellfish Farming

ShellfishingCommercial Shellfishing

ShelterbeltsShigellaShinerShipsShoalsShock

Shock Loads Shooting

Well ShootingShore

Shore ProtectionShoreline

Shoreline Cover

ShoresLake Shores

Short'termShort-term Planning

Shortage Water Shortage

Shoulder Shoulder Ditches

Shrimp Shrubs Sierozems Sieve

Sieve AnalysisSievesSilage SilicaSilicatesSiliconSilt

Silt Factor Silt Load

Silting Reservoir Silting

Silver Silver Iodide

Silvenide Similitude

Hydraulic Similitude Simulated

Simulated Rainfall Simulation

Simulation Analysis Simulators

Rainfall Simulators Sink

Sink DrainsSinksSinuous

Sinuous FlowSiphonsSite

On-site Data Collections On-site Investigations On-site Laboratories On-site TestsSite Selection

SitesCamp SitesReservoir Sites

5//mgReservoir Siting

SituIn Situ Tests

SizeGrain Size Particle SizePore Size

SkatingIce Skating

SkiingSnow Skiing

SkimmersOil Skimmers

Skimming SlabsSlatted

Slatted FloorsSleetSlicks

Oil Slicks

SlideSlide Gates

SlimeSlope

Continental Slope Natural Slope Rock Slope Stability Slope DegradationSlope Gages Slope Protection Slope Stability Slope Stabilization

Slopes Insular Slopes

SlopingSloping Waves

Slotted Slotted Floors

SludgeActivated Sludge Activated Sludge Process Alum Sludge Artificial Sludge Bulking Sludge Chemical Sludge Digested Sludge Humus Sludge Liquid SludgePrimary Sludge Septic Sludge Sludge Bank Sludge Bed Sludge BulkingSludge Cake Sludge Conditioning Sludge Dewatering Sludge DigestionSludge DisposalSludge DryingSludge ExcessSludge FiltersSludge LagoonsSludge SeedingSludge Solids Sludge Thickening Sludge Utilization Sludge Volume Index

SluiceSluice Gates

SluicesSlurriesSlushSmall

Small WatershedsSmeltSmogSmoke SmoltSnail

Snail DarterSnailsSnow

Blowing SnowDrifting SnowNew SnowOld Snow Snow Accumulation Snow AvalanchesSnow CorniceSnow CoursesSnow CoverSnow DensitySnow Depth

Snow FencesSnow GagesSnow ManagementSnow Mantle Snow Pillows Snow Removal Snow Samplers Snow Sampling Snow SkiingSnow Storage Snow Surveys Snow Traps Snow Tubes

Snowdrift SnowlineSnowmeltSnowpackSoaking SoapsSocial

Social Adjustment Social Aspects Social Benefits Social Change Social Costs Social Impact Social Needs Social Participation Social Values

Societies Professional Societies Technical Societies

SociologyRural Sociology Urban Sociology

Sodium Sodium ArseniteSodium ChlorideSodium CompoundsSodium HydroxideSodium Sulfate

SoftSoft Water

Softening Water Softening

Softwood Soil

Fine Textured SoilSoil Absorption CapacitySoil AerationSoil AggregatesSoil AlgaeSoil AmendmentsSoil AnalysisSoil BacteriaSoil CementSoil Chemistry Soil Classification Soil ColumnsSoil CompactionSoil ConservationSoil ContaminationSoil CreepSoil DensitySoil Density ProbesSoil DispersantsSoil Disposal Fields Soil Dynamics Soil EngineeringSoil EnvironmentSoil ErosionSoil FiltersSoil FormationSoil Fungi

DW-28 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Stanford

Soil GasesSoil GenesisSoil HorizonsSoil InterpretationSoil ManagementSoil Mechanics Soil Moisture Soil Moisture Deficiency Soil Moisture Meters Soil Moisture Retention Soil Organic Matter Soil Physical Properties Soil PhysicsSoil PorositySoil PressureSoil ProfilesSoil PropertiesSoil ReclamationSoil Salinity Soil Saturation Soil Science Soil Sealants Soil Solution Soil Stability Soil StabilizationSoil Strength Soil StructureSoil SurfacesSoil Surveys Soil Temperature Soil TestsSoil TextureSoil TreatmentSoil TypesSoil WaterSoil Water PotentialSoil Water SuctionSoil Water TableSoil-moisture Tension Soil-water-plant Relationships

SoilsAcidic Soils Aeolian Soils Alkaline SoilsAlluvial SoilsAquatic SoilsBrown SoilsCalcareous SoilsChestnut SoilsCohesionless SoilsCohesive Soils Colluvial Soils Compacted Soils Expansive Soils Forest Soils Glacial Soils Hardpan Soils Impervious Soils Lake Soils Muck Soils Organic Soils Peat Soils Pervious Soils Residual Soils Saline Soils Saturated Soils Water Repellent Soils

SolarSolar DistillationSolar Energy Solar Radiation Solar Stills

Solid Solid Waste DisposalSolid Wastes

SolidsDissolved Solids

Mixed Liquor SolidsSettleable SolidsSludge SolidsSolids Contact ProcessesSuspended SolidsVolatile Solids

Solifluction Solitary

Solitary Waves Solubility

Solubility Coefficient Solute

Solute TransportSolutesSolution

Soil SolutionSolvents

Organic Solvents Sonar Sorghum Sorption

Sorption WaterSorting

Sediment SortingSound

Sound Waves SoundingSoundsSources

Energy SourcesNonpoint Pollution SourcesPollution SourcesWater Pollution Sources

SovereignSovereign Immunity

SoybeansSpace

Open Space Void Space

SpacecraftSpacing

Drain SpacingSpartinaSpatial

Spatial DistributionSpawning Speciation Species

Species Composition Species Density Species Diversity

Specific Specific Capacity Specific Conductivity Specific Gravity Specific Head Specific Heat Specific Humidity Specific Retention Specific Yield

SpecificationsSpectra

Mass Spectra Spectral

Spectral AnalysisSpectrometers Spectrometry

Mass SpectrometrySpectrophotometry

Atomic Absorption

SpectrophotometryInfrared Spectrophotometry

SpectroscopyAtomic Absorption

SpectroscopyEmission Spectroscopy Infrared Spectroscopy X-ray Spectroscopy

Spent Spent Pulping Liquors Spent Sulfite Liquors

SphaerotilusSpills

Oil SpillsSpillway

Spillway CapacitySpillway ChannelsSpillway Crests Spillway Gates Spillway Trough

Spillways Spirogyra Spoil

Dredge Spoil Spoil BanksSpoil Disposal

Spores Sport

Sport FishingSports

Water SportsSpray

Spray IrrigationSprayingSpraysSpreading

Flood SpreadingLand Spreading Water Spreading

SpringSpring TidesSpring Water

SpringsArtesian SpringsBarrier SpringsBorder SpringsBoundary Springs Channel Springs Cold Springs Contact Springs Depression Springs Dimple Springs Fault Springs Filtration Springs Fissure Springs Fracture Springs Gravity Springs Hardpan Springs Hot Springs Intermittent Springs Knoll Springs Lake Bottom Springs Medicinal SpringsMineral SpringsMud Springs Perched Springs Perennial SpringsPocket Springs Pulsating Springs Radioactive SpringsSeepage SpringsSubmarine SpringsTalus Springs

Terrace SpringsThermal SpringsValley SpringsVolcanic SpringsWarm Springs

Sprinkler Sprinkler. Irrigation

Sprinklers Sprinkling Spruce

Spruce TreesSpur

Spur DikesSpursSquallsSquares

Least Squares Method Stability

Dam Stability Rock Slope Stability Slope Stability Soil StabilityStability Analysis

StabilizationBank StabilizationContact Stabilization Contact Stabilization ProcessSlope StabilizationSoil StabilizationStabilization LagoonsStabilization PondsStream Stabilization

StableStable ChannelsStable Isotopes

StageBankfull Stage Embryonic Growth Stage Falling StageImmature Growth StageJuvenile Growth StageLarval Growth StageMature Growth StageRising StageStage DigestionStage Treatment Stage-discharge Relations Warning Stage

Stages Flood Stages Growth Stages Lake Stages Reservoir Stages

Stagnant Stagnant Water

Standard Standard Deviation Standard Project Flood

Standards Design Standards Effluent StandardsPre-treatment StandardsWater Quality Standards

Standing Standing CropsStanding Waters Standing Waves

StandpipesStanford

Stanford Watershed Model

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-29

Staphylococcus (Cont) WATER RESOURCES THESAURUS

StaphylococcusStarchState

State JurisdictionStatement

Environmental ImpactStatement

StaticStatic Head

StationaryStationary FlowStationary Process

StationsGaging Stations Hydrometric Stations

Statistical Statistical Analysis Statistical MethodsStatistical Models

StatisticsStatutesSteady

Steady FlowSteam

Steam TurbinesSteel

Steel IndustrySteel Pipes

Stem/lowStephanodiscusSteppesSterilantsSterilizationSticklebackStilling

Stilling Basins Stilling Wells

Stills Solar Stills

StochasticStochastic Hydrology Stochastic Models Stochastic Process

Stocking Fish Stocking

StokesStokes Law

StomataStomatal

Stomatal Transpiration Stone/liesStorage

Bank Storage Carryover Storage Channel Storage Conservation Storage Controlled Storage Cyclic StorageDaily StorageData Storage and RetrievalDead StorageDepression Storage Effective Storage Flood-control StorageGroundwater StorageHoldover StoragePocket StoragePumped StorageReservoir StorageSeasonal StorageSnow Storage

Storage CapacityStorage CoefficientStorage EquationStorage GalleryStorage RatioStorage RequirementsStorage ReservoirsStorage TanksUnderground StorageUseful StorageValley StorageWaste StorageWater Storage

StormStorm Drainage Storm Drains Storm Runoff Storm Seepage Storm Sewage Storm SewersStorm SurgesStorm TidesStorm WastewaterStorm WaterStorm-overflow Sewers

StormsArtificial StormsDesign StormsDust Storms

StrainStrain GagesStrain MeasurementStress-strain Curves ,

StraitsStratification

Chemical StratificationDensity StratificationThermal Stratification

Stratified Stratified Flow

Stratigraphy StrawStream

Stream Banks Stream BiotaStream Classification Stream Degradation Stream DischargeStream ErosionStream FisheriesStream FlowStream GagesStream Gradient Stream Improvement Stream OrderStream PollutionStream Profiles Stream Stabilization Stream Upflow

Streambeds Stream/low

Streamflow DepletionStreamflow Forecasting

StreamsAcid Streams Antecedent Streams Braided StreamsCoastal StreamsConfluent StreamsConsequent StreamsContinuous StreamsEffluent StreamsEphemeral StreamsFlashy Streams

Gaining StreamsGlacial StreamsGraded StreamsInfluent StreamsInsulated StreamsIntermittent StreamsInterrupted StreamsLive StreamsLosing StreamsNatural StreamsNonperennial StreamsPerched StreamsPerennial StreamsPermanent StreamsPoised Streams Ponded Streams Regime Streams Seasonal Streams Subterranean Streams Temporary StreamsTidal StreamsUnderground Streams

StreeterStreeter-Phelps Equation

StrengthBearing StrengthCompressive StrengthShear StrengthSoil StrengthTensile Strength

StreptococcusStress

Moisture StressShear StressStress AnalysisStress DistributionStress-strain CurvesTensile Stress Thermal Stress Water Stress

Strip Strip CroppingStrip Mine LakesStrip Mine Wastes Strip Mines

StrontiumStrontium Radioisotopes

StructuralStructural BeamsStructural BehaviorStructural EngineeringStructural GeologyStructural Models Structural Settlement Structural Water

StructureChemical Structure Molecular Structure Soil Structure

Structures Check StructuresConveyance StructuresDiversion StructuresHydraulic StructuresLateral Conveyance Structures Sedimentary Structures Underground Structures

StudiesBaseline StudiesCase StudiesComparison StudiesElectrical StudiesFeasibility StudiesGeothermal Studies

Gravity StudiesHydrothermal StudiesInterdisciplinary StudiesIsotope StudiesLatitudinal StudiesLife History StudiesMagnetic StudiesMathematical StudiesMicrobiological StudiesModel Studies

SturgeonSubarctic

Subarctic ZoneSubartesian

Subartesian Wells Subcritical

Subcritical Flow Subhumid

Subhumid ClimatesSublethai

Sublethal EffectsSublimationSubmarine

Submarine CanyonsSubmarine Springs

SubmarinesSubmerged

Submerged BedsSubmerged LandsSubmerged Plants

SubmergenceSubmersible

Submersible PumpsSubsidenceSubsidiesSubsoil

Subsoil Drainage Subsoil Drains

SubstancesPlant Growth Substances

SubstationsSubstratesSubsurface

Subsurface DrainageSubsurface Drains Subsurface Filters Subsurface FlowSubsurface IceSubsurface IrrigationSubsurface MappingSubsurface RunoffSubsurface Water

Subterranean Subterranean StreamsSubterranean Water

Subtropic Subtropic Zone

Suburban Suburban Areas

SuccessionSuckerSucroseSuction

Soil Water Suction Sudangrass Sugar

Sugar BeetsSugar Crops

SugarcaneSugarsSulfate

Aluminum Sulfate

DW-30 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS"

DESCRIPTOR WORDS Thermal

Calcium SulfateCopper SulfateFerric SulfateSodium Sulfate

SulfatesSufflde

Hydrogen SulfideSulfidesSulflte

Spent Sulfite LiquorsSulfite LiquorsSuinte Mills

SulfonateTetrapropylene- benzene

Sulfonate Sulfonates

Alkylbenzene SulfonatesLinear Alkyl Sulfonates

SulfurSulfur BacteriaSulfur CompoundsSulfur Cycle

SulfuricSulfuric Acid

SumpsSunfish SupercoolingSupercritical

Supercritical Flow Supersaturation Supervisory

Supervisory ControlSupplemental

Supplemental Irrigation 'Supply

Elasticity of SupplyPotential Water SupplyWater Supply Water Supply Development Water Supply Systems

Supports Government Supports Tunnel Supports

SurfSurface

Groundwater-surface Relations Surface DetentionSurface Drainage 'Surface FlowSurface IrrigationSurface PermeabilitySurface RunoffSurface SealingSurface TensionSurface Velocity Surface WaterSurface Water AvailabilitySurface Water RecordsSurface-active AgentsSurface-groundwater RelationsWater Surface Profiles

SurfacesFree Surfaces Soil Surfaces

Surfactants Nonionic Surfactants SurfboardingSurge

Surge TanksSurges

Glacier SurgesStorm Surges

Switching SurgesSurveying

Surveying InstrumentsSurveys

Environmental SurveysGeological SurveysSnow SurveysSoil Surveys

SurvivalSuspended

Suspended LoadSuspended SedimentsSuspended SolidsSuspended Water

Suspension Swamps

Mangrove SwampsSwansSweet

Sweet PotatoesSwimming

Swimming PoolsSwitching

Switching SurgesSymbiosisSymposium Synergistic

Synergistic Effects Synoptic

Synoptic Analysis SynthesisSynthetic

Synthetic HydrologySystem

Flow SystemSystematicsSystems

Aquifer Systems Closed Systems Control Systems Drainage Systems Hydraulic Systems Hydrologic Systems Ice-brine SystemsInformation Systems River Systems Root SystemsSaline Water SystemsSewage SystemsSewer SystemsSystems AnalysisSystems EngineeringWarning SystemsWater Supply Systems

TTabellariaTable

Apparent Water Table Interrupted Water TableNatural Water Table Perched Water Table Soil Water Table Water TableWater Table AquifersWater Table DeclineWater Table FluctuationsWater Table GradientWater Table Profiles

Water Table RiseWater Table Wells

TaggingTailingsTailraceTailwaterTalus

Talus SpringsTamariskTangible

Tangible BenefitsTankers

Oil TankersTanks

Holding Tanks Septic Tanks 'Settling TanksStorage TanksSurge TanksWater Tanks

TanneryTannery Wastes

TanninsTariff-Taste

Taste-producing Algae Tax

Tax Rates Taxes

Pollution Taxes Progressive TaxesRegressive Taxes

TaxonomyTBSTechnical

Technical SocietiesTechnical Writing

Techniques Culturing Techniques Marking Techniques Radioactivity Techniques Separation Techniques Tracking Techniques

TechnologyConcrete Technology Satellite Technology Technology Transfer

TectonicsTelemetryTemperate

Temperate ZoneTemperature

Air TemperatureSoil Temperature Temperature ControlTemperature EffectsTemperature GradientWater Temperature

TemporalTemporal Distribution

TemporaryTemporary Streams

TensileTensile Strength Tensile Stress

TensiometersTension

Capillary TensionMoisture TensionSoil-moisture TensionSurface Tension

TenureLand Tenure

TermLong-term PlanningShort-term Planning

TerraceDrainage TerraceTerrace ChannelsTerrace Springs

TerracesGeological Terraces

TerracingContour Terracing

TerrainTerrain Analysis

TerritorialTerritorial Waters

TertiaryTertiary Wastewater

TreatmentTest

Most Probable Number TestTest FacilitiesTest HolesTest Wells

Testing Aquifer TestingConcrete Testing Foreign Testing Materials Testing Model Testing Pump TestingRock TestingTesting ProceduresWell Testing

TestsBiochemical TestsField TestsFreeze-thaw Tests In Situ Tests Nondestructive Tests On-site Tests Prototype Tests Pumping Tests Shear Tests Soil Tests

Tetrapropylene Tetrapropylene-benzene

SulfonateTextile

Textile Mill WastesTextilesTexture

Soil TextureTextured

Fine Textured SoilThalassiosiraThalwegThaw

Freeze-thaw TestsThawingTheis

Theis Equation Theoretical

Theoretical Analysis Theory

Dupuit-Forchheimer TheoryKinematic Wave TheoryMohr Failure TheoryQueueing Theory

ThermalDifferential Thermal Analysis

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-31

Thermal (Cont.) WATER RESOURCES THESAURUS

Thermal CapacityThermal ConductivityThermal DischargesThermal Expansion Thermal PlumesThermal Pollution Thermal Power Thermal Powerplants Thermal Properties Thermal Radiation Thermal Springs Thermal Stratification Thermal Stress Thermal Tolerance Thermal Water

Thermo Thermo-osmosis

Thermocline Thermocouples Thermodynamic

Thermodynamic BehaviorThermodynamicsThermometersThermophilic

Thermophilic Bacteria Thesauri Thickening

Sludge ThickeningThickness

Ice ThicknessThiems

Thiems EquationThin

Thin Films Thin Layer Chromatography

ThiobacillusThiocarbamate

Thiocarbamate PesticidesThorium Through/all Thrusting

Frost Thrusting ThunderstormsTidal

Tidal Amplitude Tidal Basins Tidal BoresTidal CurrentsTidal Cycle Tidal Effects Tidal EfficiencyTidal EnergyTidal FlatsTidal FloodsTidal Hydraulics Tidal MarshesTidal PowerplantsTidal PrismTidal Range Tidal RiversTidal StreamsTidal WatersTidal Waves

TideRed TideTide Lands

TidesNeap TidesSpring TidesStorm TidesWind Tides

TidewaterTilapiaTile

Tile Drainage Tile Drains

Tiles Tilting

Tilting Dams Time

Concentration Time Detention Time Geologic Time Retention Time Time of Concentration Time Series Analysis Turnover Time

TimesDetection Times

Timing TinTissue

Tissue AnalysisTissues

Animal Tissues Plant Tissues Vascular Tissues

Titanium ToadsTobaccoTolerance

Median Tolerance LimitSalt Tolerance Thermal Tolerance

TomatoesTool

Cable Tool DrillingTopographic

Topographic MappingTopography Topology Topsail Tornadoes TortsTotal

Total Costs Total Organic Carbon Total Oxygen Demand

TourismTowers

Cooling Towers Transmission Towers

ToxicityPesticide Toxicity

ToxinsAlgal Toxins Fish Toxins

TraceTrace ElementsTrace LevelsTrace Metals

TracersEnvironmental TracersIsotopic TracersRadioactive Tracers

TrackingTracking Techniques

TractionTraction Load

TractiveTractive Forces

TradeForeign TradeTrade AssociationsTrade Wastes

TrafflcabilityTraining

River Training Tranquil

Tranquil Flow Transducers Transfer

Energy Transfer Heat Transfer Mass Transfer Momentum Transfer Oxygen Transfer Technology TransferWater Transfer

Transfers Interbasin Transfers

TransformersPower Transformers

TransientsHydraulic Transients

Transition Transition Flow Transition Zone

TranslationsTranslatory

Translatory WavesTranslationTransmission

Data TransmissionElectrical TransmissionTransmission Constant Transmission Lines Transmission Towers

TransmissivityTransparencyTranspiration

Cuticular Transpiration Stomatal Transpiration Transpiration Control Transpiration Ratio

TransportIon Transport Sediment Transport Solute TransportTransport DepletionWastewater Transport Water Transport

TransportationHydraulic Transportation

TransverseTransverse Drainage

Trap Trap Efficiency

TrappingTraps

Snow TrapsTrash

Trash RacksTravelTraveltimeTravertineTrawlingTreated

Treated WaterTreatiesTreatment

Advanced Wastewater

TreatmentAerobic TreatmentAnaerobic TreatmentBiological Treatment Biological Wastewater

Treatment Chemical Treatment Combined Treatment Complete Wastewater

Treatment Feedwater Treatment Heat Treatment Land Treatment Physicochemical Treatment Pre-treatment Standards Primary Wastewater

Treatment Secondary Wastewater

Treatment Seed Treatment Sewage Treatment Soil TreatmentStage TreatmentTertiary Wastewater

TreatmentTreatment Plants Waste Treatment Wastewater Treatment Water Pollution Treatment Water Treatment Water Treatment Facilities

TreesBeech TreesBirch TreesCottonwood TreesDeciduous TreesFir TreesHemlock Trees Juniper Trees Maple TreesOak TreesPine TreesSpruce Trees Willow Trees

Trematodes Trenches TrespassTriazine

Triazine Pesticides Tributaries TrichopteraTrickle

Trickle Irrigation Trickling

Trickling FiltersTriphosphate

Adenosine TriphosphateTriptonTriticum

Triticum AestivumTritiumTrophic

Trophic LevelTropic

Tropic ZoneTropical

Tropical CyclonesTropical Regions

TropismsTrough

Spillway TroughTroutTrunk

Trunk Sewer

DW-32 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Walls

TrustPublic Trust Doctrine

Trutta Salmo TrutU

Tsunamis Tube

Vertical Tube Evaporators Tubes

Snow TubesTubtfex Tubtflclds TunaTundra Tungsten Tunnel

Tunnel ConstructionTunnel Failure Tunnel Hydraulics Tunnel Linings Tunnel Supports

Tunneling Tunnels Turbidity

Turbidity Currents Turbidity Flow

TurbinesFrancis Turbines Hydraulic TurbinesPump Turbines Steam Turbines

Turbulence Turbulent

Turbulent Diffusion Turbulent Flow

Turf Turf Grasses

TurgtdityTurnover

Turnover TimeTurtlesTwo-phase

Two-phase Flow Types

Soil Types Typha Typhoons

UUltraflltration Ultrasonics Ultraviolet

Ultraviolet RadiationUnconflned

Unconflned AquifersUnconsolldated

Unconsolidated Aquifers UnderflowUnderground

Underground PowerplantsUnderground Storage Underground StreamsUnderground StructuresUnderground Waste Disposal

UnderseepageUnderwaterUnemployment Untfbrm

Uniform Flow Uniformity

Uniformity Coefficient Unions

Labor Unions Unit

Composite Unit Hydrographs Unit Hydrographs

UnitedUnited Nations

Units Farm UnitsOeohydrologic UnitsGeologic Units

Universities Unsaturated

Unsaturated Flow Unsaturated Zone

Unstable Unstable Channels

UnsteadyUnsteady Flow

UpWave Pile-up

Upconing Up/low

Stream UpflowUpl(fi

Uplift PressureUpstream Uptake

Moisture Uptake Oxygen Uptake

Upwelltng Uranium

Uranium RadloisotopesUrban

Urban AreasUrban Development Urban Drainage Urban Hydrology Urban PlanningUrban Renewal Urban Runoff Urban Sociology Urban Watersheds

UrbanizationUrchins

Sea UrchinsUrea

Urea Pesticides Ureas Urine Use

Alternative Water UseBeneficial UseCompeting UseConjunctive UseConsumptive Use Impaired Water Use Industrial Water UseLand UseLand Use ControlLand Use Planning Natural UseNonconsumptive UseReasonable Use

Water UseWater Use Efficiency

Useful Useful Storage

User User Charges

Users Water Users

Usufructuary Usufructuary Right

Utilities Utility

Public Utility DistrictsUtility Extension

Utilisation Sludge Utilization

VVacuum

Vacuum Drying Vacuum Filters Vacuum Filtration

Vadose Vadose Water

ValleyValley Springs Valley Storage

Valleys Value

Condemnation Value Market ValuePresent Value Property Value Salvage Value Water Value

Values Land ValuesSocial Values

I//1/UMraivesHydraulic Valves

Vanadium Vapor

Vapor Compression Distillation

Vapor Pressure Water Vapor

VaporizationVariability Variance

Analysis of Variance Variation

Seasonal VariationVariation Coefficient

Varied Gradually-varied Flow Varied Flow

VarietiesVascular

Vascular Tissuest/*fmmt»LI*regetaoie

Vegetable Crops Vegetation

Riparian VegetationVegetation EffectsVegetation Establishment Vegetation Regrowth

VelocityAverage Velocity

Critical VelocityEffective VelocityFall Velocity Flow Velocity Infiltration Velocity Settling Velocity Surface VelocityVelocity Coefficient Velocity Curve Velocity Distribution Velocity HeadVelocity of Approach Velocity Potential Wave VelocityWind Velocity

Ventilation Venturi

Venturi MetersVertical

Vertical Distribution Vertical Flow Vertical Tube Evaporators

Vertictllium Vetch Vibrations VibrioVigil

Vigil BasinsVine

Vine Crops ViricidesVirus

Coxsackie VirusViruses

Plant VirusesViscometers Viscosity

Absolute Viscosity Kinematic Viscosity Viscosity Coefficient

ViscousViscous Flow

VitaminsVoid

Void Ratio Void Space

VolatileVolatile Acids Volatile Solids

Volatility Volcanic

Volcanic SpringsVolcanoes Voltage

High VoltageVolume

Runoff Volume Sludge Volume Index

VolumetricVolumetric Analysis

Vortices

W\1S~JIwaaiWages Walls

Retaining WallsSea Walls

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-33

Wandering (Cont) WATER RESOURCES THESAURUS

WanderingWandering Water

WarburgWarburg Respirometry

WarmWarm Springs

WarningWarning StageWarning Systems

WashRiver WashWuhLoadWash WaterWave Wash

WashingPulp Washing

Washouts Waste

Radioactive Waste DisposalSolid Waste DisposalUnderground Waste DisposalWaste BurialWaste CharacteristicsWaste DischargeWaste DisposalWaste DumpsWaste HeatWaste IdentificationWaste LoadWaste ManagementWaste PaperWaste RecoveryWaste StorageWaste TreatmentWaste-assimilative Capacity

WastesAgricultural WastesAnimal WastesArtesian WastesBarn WastesBleaching WastesChemical WastesCoal Mine WastesDesalination WastesDomestic WastesDye Industry WastesFarm WastesFeedlot WastesField WastesFood-processing WastesHousehold WastesIndustrial WastesKrafl Mill WastesLiquid WastesManufacturing WastesMetal-finishing WastesMine WastesMunicipal WastesNuclear WastesOil WastesOperation WastesOrganic WastesPlating WastesPulp WastesRadioactive WastesRecreation WastesRefinery WastesSolid WastesStrip Mine WastesTannery WastesTextile Mill WastesTrade WastesWood Wastes

WastewaterAdvanced Wastewater

Treatment Barn Wastewater Biological Wastewater

TreatmentChemical Wastewater Clarified Wastewater Combined Wastewater Complete Wastewater

Treatment Crude Wastewater Filtered Wastewater Industrial Wastewater Municipal Wastewater Oxidized Wastewater Primary Wastewater

Treatment Raw Wastewater Sanitary Wastewater Secondary Wastewater Secondary Wastewater

Treatment Septic Wastewater Storm Wastewater Tertiary Wastewater

TreatmentWastewater Analysis Wastewater Collection Wastewater Composition Wastewater Dilution Wastewater Discharge Wastewater Disposal Wastewater Facilities Wastewater Farming Wastewater Irrigation Wastewater Lagoons Wastewater Management Wastewater Outfall Wastewater Oxidation Wastewater Pollution Wastewater Purification Wastewater Reclamation Wastewater Renovation Wastewater Transport Wastewater Treatment

WastingMass Wasting

WaterAbsorbed Water Acid Mine Water Acidic Water Adhesive Water Air-water Interfaces Alkaline Water Alternative Water Use Anastatic Water Apparent Water Table Artesian Water Atmospheric Water Available Water Boiler Water Boiling Water Reactors Bottom Water Bound Water Brackish Water Capillary Water Clear-water Reservoirs Combined Water Confined-water Wells Connate Water Cooling Water Deep Water Deep-water Habitats Distilled Water Domestic Water Drainage Water Drinking Water

Earth-water Interfaces Excess Water Film WaterFiltered-water Reservoirs Fissure Water Fossil Water Free Water Fringe Water Fugitive Water Funicular Water Gravitational Water Gravity Water Heated Water Heavy Water High Water Mark Hygroscopic Water Ice-water Interfaces Impaired Water Quality Impaired Water Use Imported Water Industrial Water Industrial Water Use Infiltration Water Influent Water Intermediate Water Internal Water Interrupted Water Table Interstitial Water Irrigation Water Juvenile Water Leaf Water Potential Low Water Mark Magmatic Water Maximum Available Water Melt Water Metamorphte Water Meteoric Water Metropolitan Water

Management Mine Water Mineral Water Mud-water Interfaces Municipal Water Native Water Natural Water Table Oil-water Interfaces Oily Water Pellicular Water Pendular Water Perched Water Perched Water Table Percolating Water Phreatic Water Plant Water Potential Plerotic Water Plutonic Water Pore Water Potable Water Potential Water Supply Pressurized Water Reactors Pretreatment of Water Process Water Raw Water Recirculated Water Reclaimed Water Regenerated Water Return Water Rinse Water Riparian Water Loss Saline Water Saline Water Barriers Saline Water Intrusion Saline Water Systems Salt Water Salvaged Water Sediment-water Interfaces Seep Water

Shallow Water Soft Water Soil Water Soil Water Potential Soil Water Suction Soil Water Table Soil-water-plant Relationships Sorptton Water Spring Water Stagnant Water Storm Water Structural Water Subsurface Water Subterranean Water Surface Water Surface Water Availability Surface Water Records Suspended Water Thermal Water Treated Water Vadose Water Wandering Water Wash Water Water Allocation Water Analysis Water Availability Water Balance Water Beetles Water Birds Water Bleeding Water Boundary Water Budget Water Circulation Water Conditioning Water Conservation Water Consumption Water Control Water Conveyance Water Cooling Water Costs Water Currents Water Cycle Water Deficit Water Delivery Water Demand Water Depth Water Development Water Distribution Water Districts Water Exchange

' Water Flooding Water Flow Water Harvesting Water Holes Water Hyacinth Water Importing Water Injury Water Law Water LevelWater Level Fluctuations Water Level Recorders Water Loss Water Mains Water Management Water Measurement Water Metering Water Permits Water Phone Water Plane Water Policy Water Pollution Water Pollution Control Water Pollution Effects Water Pollution Prevention Water Pollution Sources Water Pollution Treatment Water Potentials

DW-34 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS".

DESCRIPTOR WORDS Writing

Water PressureWater PropertiesWater PurificationWater QualityWater Quality Control Water Quality CriteriaWater Quality DataWater Quality ManagementWater Quality StandardsWater QuantityWater Rates Water ReclamationWater RecordsWater Repellent SoilsWater Requirements Water Resources DevelopmentWater Resources InstitutesWater ReuseWater RightsWater SamplingWater ScarcityWater ShortageWater SofteningWater SportsWater SpreadingWater StorageWater StressWater SupplyWater Supply DevelopmentWater Supply SystemsWater Surface ProfilesWater TableWater Table AquifersWater Table DeclineWater Table FluctuationsWater Table Gradient Water Table Profiles Water Table Rise Water Table Wells Water TanksWater TemperatureWater TransferWater Transport Water Treatment Water Treatment Facilities Water UseWater Use Efficiency Water UsersWater ValueWater VaporWater WheelsWater YieldWater Yield Improvement Water ZoningWater-air Interfaces Water-balance Equation Water-bearing Formations Water-carrying Capacity Water-earth Interfaces Water-ice Interfaces Water-mud InterfacesWater-oil Interfaces Water-sediment Interfaces Well Water White Water

Watercourses Artificial Watercourses Natural Watercourses

WaterfallsWater/leas WaterfowlWaterfront

Waterfront Facilities

WaterloggingWaterproofingWaters

Coastal WatersForeign Waters International WatersNatural WatersNavigable WatersNonnavigable WatersPublic WatersRiparian Waters Running WatersStanding WatersTerritorial WatersTidal Waters

WatershedStanford Watershed ModelWatershed DevelopmentWatershed Me«agementWatershed ModelsWatershed Protection

WatershedsAgricultural WatershedsDemonstration WatershedsExperimental WatershedsForest WatershedsLarge WatershedsSmall WatershedsUrban Watersheds

WaterwaysGrassed WaterwaysInland Waterways

WaveKinematic Wave TheoryMud WaveWave Action Wave Crest Wave Direction Wave Height Wave Pile-upWave PropagationWave RefractionWave Runup Wave Velocity Wave Wash

WavelengthsWaves

Abrupt WavesCapillary WavesElectromagnetic WavesFlood WavesGravity WavesGroundwater Waves Internal WavesKinematic Waves Ocean Waves Oscillatory Waves Phreatic Waves Primary Waves Radio Waves Sand WavesSeismic Waves Sloping Waves Solitary Waves Sound WavesStanding Waves Tidal Waves Translatory WavesU/inrl U/at/Mwind »ravc3

WayRight-of-way

WeatherCold Weather ConstructionWeather Data Collections

Weather ForecastingWeather ModificationWeather PatternsWeather Satellites

Weathering Weathering Zone

WeberWeber Number

WeddWa»ttwweeo

Aquatic Weed Control Weed Control

V/m*J~WeedsAquatic Weeds

WeightT*J^: _rrifinWeisbach

Darcy-Weisbach EquationWell

Electrical Well LoggingRadioactive Well LoggingWell CapacityWell CasingsWell DataWell DevelopmentWell DrillingWell FiltersWell FloodingWell FunctionWell HoleWell HydraulicsWell HydrographsWell IntakeWell Logs\&/^ll !?_ j _ 'i iwell renniuWell Regulations Well Screens Well Seepage Well ShootingWell TestingUrVII Wat^rWell "ulcr

Well YieldWellpoints Wells

Abandoned WellsAbsorbing Wells Abyssinian Wells Artesian Wellsf*\mmm Al/^ll*4_iear wensCombination WellsConfined-water Wellsrv^^ri u/^n«ueao wens Deep Wells Diffusion WellsDisposal Wells Drainage Wells Dry Wells Dug Wells Flowing Wells Fully Penetrating Wells Horizontal WellsInjection Wells Inlet Wells Input Wells Inverted WellsIrrigation Wells Natural Wells Negative WellsObservation Wellsf\L\ \1/_||_*_ni wens Open Wells Partially Penetrating WellsPump WellsRadial Wells

Recharge WellsRelief WellsScreened WellsShallow WellsStilling Wells Subartesian WellsTest WellsWater Table Wells

W»tfrtt

Wet Air Oxidation Wet ClimatesWet Oxidation Process

WetlandsWettability Wettingn/L _ |-_WhalesWheatWheatgnssesWheel

Fixed Wheel GatesU/t-_f_Wheels

Water WheelsWhite

White WaterWhitefishnrn jrVila

Wild RiversWilderness

Wilderness AreasWildlife

Wildlife ConservationWildlife Habitats Wildlife Management

Williams Hazen- Williams Equation

WillowWillow Trees

Wilting Wilting Coefficient Wilting Point

Wind Wind DepositsWind' ErosionWind GagesWind GapWind PressureWind Setup Wind TidesWind Velocity Wind Waves Wind-driven Currents

Windbreaks Winkler

Winkler MethodWithdrawal

Selective Withdrawal Wood

Wood Wastes Wool

Wool GreaseWool Scouring

Works Sewage Works

WritingTechnical Writing

Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS". DW-35

Writing (Cont.)

XX-ray

X-ray Diffraction X-ray Fluorescence X-ray Spectroscopy

X-raysXerophytes

WATER RESOURCES THESAURUS

ZonesClimatic Zones

ZoningFlood Plain ZoningWater Zoning

Zoogloca Zooplankton

Yeasts Yield

Crop YieldEconomic YieldOptimal YieldReservoir YieldSafe YieldSediment YieldSpecific YieldWater YieldWater Yield ImprovementWell YieldYield Equations

YoungYoung Rivers

YoungsYoungs Modulus

YttriumYttrium Radioisotopes

ZeoliteZeolite Process

Zeolites Zero

Zero DischargeZero Moisture Index

ZetaZeta Potential

ZincZinc Radioisotopes

Zirconium Zone

Aeration ZoneAnomorphic ZoneAphotic ZoneArctic ZoneArid ZoneArid-zone HydrologyCapillary ZoneCoastal Zone ManagementContiguous ZoneEuphotic ZoneLittoral ZonePellicular ZoneRoot ZoneSaturation ZoneSubarctic ZoneSubtropic ZoneTemperate ZoneTransition ZoneTropic ZoneUnsaturated ZoneWeathering Zone

DW-36 Words on this list are not necessarily valid descriptors. Check section "DESCRIPTORS"

DESCRIPTORS

AbaloneAbandoned Wells Ablation Abrasion Abrupt Waves Absorption Absorption Loss Abstracts Abutments Abyssinian WeUs Acaricides Accelerated Erosion Accelerated Flow Access Routes Accidents Acclimatization Accounting Accretion Accumulation Acetic Acid Acetylene Reduction Achromobacter Acid Mine Drainage Acid Rain Acid Streams Acidic Soils Acidic Water Acidity Acids Acoustics Actinomyces Activated Carbon Activated Sludge Activated Sludge Process Adaptation AdditivesAdenosine Tripbosphate AdbesivesAdjudication Procedure Administration Administrative Agencies Administrative Decisions Administrative Regulations Adolescent Rivers Adsorbents AdsorptionAdvanced Wastewater

Treatment

AdvectionAdverse PossessionAeolian DepositsAeolian SoilsAerated LagoonsAerationAeration ZoneAeratorsAerial PhotographyAerobacterAerobic BacteriaAerobic ConditionsAerobic DigestionAerobic TreatmentAerogenesAeromonaiAerosolsAestheticsAfterbaysAgarsAggradationAggrading RiversAggregatesAgingAgricultural ChemicalsAgricultural EngineeringAgricultural HydrologyAgricultural RunoffAgricultural WastesAgricultural WatershedsAgricultureAgronomic CropsAgronomyAir CirculationAir ConditioningAir EntralnmentAir MassesAir PollutionAir Pollution EffectsAir TemperatureAir-earth InterfacesAir-water InterfacesAircraftAirportsAlbedoAlcaligenesAlcoholsAldrinAlewifeAlfalfaAlgae

Algae HarvestingAlgal ControlAlgal GrowthAlgal ToxinsAlgiddesAlgorithmsAliphatic HydrocarbonsAlkali FlatsAlkali MetalsAlkaline Earth MetalsAlkaline SoilsAlkaline WaterAlkalinityAlkylbenzene SulfonatesAlligatorweedAllotmentsAlloysAlluvial AquifersAlluvial ChannelsAlluvial DepositsAlluvial FansAlluvial PlainsAlluvial RiversAlluvial SoilsAlluviumAlpine RegionsAlteration of FlowAlternative PlanningAlternative Water UseAltitudeAlumAlum SludgeAluminum

Aluminum SulfateAmino AcidsAminotriazoleAmmoniaAmmoniflcationAmmoniumAmmonium CompoundsAmmonium SaltsAmortizationAmphibiansAmphibious PlantsAmphidiniumAmphipods

Anacystis Anadromous Fish Anaerobic Bacteria Anaerobic Conditions

Anaerobic DigestionAnaerobic LagoonsAnalog ComputersAnalog ModelsAnalog/Digital ConvertersAnalysis of VarianceAnchor IceAnchorsAnemometersAnhydriteAnimal BehaviorAnimal DiseasesAnimal GrowthAnimal MetabolismAnimal ParasitesAnimal PathologyAnimal Physiology .Animal PopulationsAnimal TissuesAnimal WastesAnion ExchangeAnionsAnisotropyAnkistrodesmusAnnelidsAnnual DistributionAnnual FloodsAnnual RunoffAnodesAnomorphic ZoneAntarcticAntecedent MoistureAntecedent Precipitation

IndexAntecedent Streams Antibiotics Anticyclones Antimony Antitranspirants Aphanizomenon Aphotic Zone ApplesApplication Rates Appraisals Appreciation Appropriation Approximation Method Aquaculture Aquariums Aquatic Animals Aquatic Bacteria

D-l

Aquatic Drift WATER RESOURCES THESAURUS

Aquatic DriftAquatic EnvironmentAquatic FungiAquatic HabitatsAquatic InsectsAquatic LifeAquatic PlantsAquatic PopulationsAquatic ProductivityAquatic SoilsAquatic Weed ControlAquatic WeedsAqueductsAquicludesAquifer CharacteristicsAquifer ManagementAquifer SystemsAquifer TestingAquifersAquitardsArch DamsArchaeologyArchitectureArcticArctic ZoneArea RedevelopmentArea! HydrogeologyAreal PrecipitationArgonArid ClimatesArid LandsArid ZoneArid-zone HydrologyArocloraAromatic CompoundsArroyosArsenicArsenic CompoundsArsenic RadioisotopesArsenicalsArtesian BasinsArtesian CapacityArtesian FlowArtesian HeadArtesian PressureArtesian SpringsArtesian WastesArtesian WellsArthrobacterArtificial LakesArtificial PrecipitationArtificial RechargeArtificial SludgeArtificial StormsArtificial WatercoursesAsbestosAsbestos CementAsphaltAsphaltic ConcreteAssayAssessmentsAssimilative CapacityAsterionellaAtmometersAtmosphereAtmospheric PhysicsAtmospheric PressureAtmospheric Water

AtollsAtomic Absorption

SpectrophotometryAtomic Absorption

SpectroscopyAttached GroundwaterAtterberg LimitsAttitudesAttractantsAntoanalyzersAutoclavesAutomationAvailable HeadAvailable WaterAvalanchesAverage FlowAverage VelocityAvulsionAzotobacter

B'

BacillusBackblowingBackfillBackground RadiationBackwashBackwaterBackwater CurveBackwater EffectBacteriaBacterial AnalysisBacterial PhysiologyBacteriddesBacteriophageBafflesBaitsBalance of NatureBalancing ReservoirsBallastBank ErosionBank ProtectionBank StabilizationBank StorageBankroll StageBanksBargesBariumBarleyBam WastesBarn WattewaterBarnaclesBarometric EfficiencyBarrier IslandsBarrier SpringsBarriersBasaltsBase FlowBase RunoffBaseline StudiesBasesBasin IrrigationBasinsBassBathylimnionBathymetry

BathythermographsBayousBaysBeach ErosionBeach ProfilesBeachesBeansBeaversBed LoadBed-load DischargeBedrockBeech TreesBeetsBeggiatoaBehaviorBench FlumesBeneficial UseBenefldationBenefitsBenthic EnvironmentBenthic FaunaBenthic FloraBenthosBentoniteBenzenesBern DitchesBennsBermndagrassBerylliumBibliographiesBicar DonatesBightsBilgeBindersBioaccumnlationBloassayBiochemical Oxygen Demand

' Biochemical TestsBiochemistryBloddesBiocontrolBiodegradationBioflltersBlofiltrationBiographiesBloindicatorsBiological FiltersBiological MagnificationBiological MembranesBiological OxidationBiological Oxygen DemandBiological PropertiesBiological SamplesBiological TreatmentBiological Wastewater

TreatmentBioluminescenceBfomassBiorhythmsBiosynthesisBiotinBiotransfbrmationBirch TreesBirdsBismuthBleaching WastesBlizzardsBlood

Blowing SnowBlowoutsBlnegillsBluegrassesBoaHaunching RampsBoatingBoating RegulationsBoatsBogsBoiler WaterBoiling Water ReactorsBond IssuesBondingBorder IrrigationBorehole GeophysicsBoreholesBoronBorrow PitsBottom CurrentsBottom SamplingBottom SedimentsBottom WaterBottomlandBound WaterBoundariesBoundary ConditionsBoundary DisputesBoundary LayersBoundary of SaturationBoundary ProcessesBoundary SpringsBonyoncos BlocksBowen RatioBrackish WaterBraided StreamsBranch SewersBreakwatersBreeder ReactorsBridge ConstructionBridge DesignBridge FailureBridgesBrine DisposalBrinesBroad IrrigationBromegrassBromidesBromineBrown SoilsBrush ControlBubble GagesBubblesBucklingBudgetingBuffalo FishBuilding CodesBuildingsBulkhead GatesBulkhead LineBulkheadsBulking SludgeBullheadBulrushesBuoyancyBuoysBuried RiversButtress DamsBypass Channels

D-2

DESCRIPTORS

Byproducts

Cable Tool DrillingCactiCoddlsfUesCadmiumCadmium RadiolsotopesCaissonsCalcareous SoilsCaldteCalciumCalcium CarbonateCalcium ChlorideCalcium CompoundsCalcium HydroxideCalcium Sul/ateCalibrationsCalicheCaloiimetryCamerasCampSltesCampingCanal ConstructionCanal Designfmnml LlningS

Canal SeepageCanalsCanneriesCanopyCantileversCanyonsCapacityCapillarityCapillary CapacityCapillary ConductivityCapillary WaterCapillary WavesCapillary ZoneCapitalCapital CostsCarbamate PesticidesCarbohydratesCarbonCarbon CycleCarbon DioxideCarbon FiltersCarbon RadiolsotopesCarbonate RocksCarbonatesCarcinogensCarnivoresCarotenoidsCarpCarpsuckerCarrotsCarrying CapacityCarryover StorageCase StudiesCasingsCastingsCatalystsCatchment AreasCatchment BasinsCatfish

Catfish FarmingCatfish PondsCathodesCation ExchangeCationsCattailsCattleCausewayCavern FlowCavesCavitationCellulose AcetateCellulose Acetate MembranesCementsCenoxoic EraCentrinigationCeratinmCereal CropsCerium RadiolsotopesCesiumCesium RadiolsotopesCesspoolsChannel AccretionChannel DetentionChannel ErosionChannel FlowChannel ImprovementChannel Inflow

Channel Morphology Channel Scour Channel Springs Channel Storage Channeling Channels Chaparral Chara Charts Check Dams Check Irrigation Check Structures delating Agents delation Chcmcontrol Chemical Analysis demical Coagulation Chemical Composition Chemical Degradation Chemical Engineering demical Industry demical Interference Chemical Oxygen Demand Chemical Potential Chemical Precipitation demical Properties demical Reactions demical Recovery demical Reduction demical Sludge demical Stratification demical Treatment demical Wastes demical Wastewater dentistry of Precipitation democllne ChertChestnut Soils dezy Equation

ChinookChlamydomonasdlorelladloridesChlorinated HydrocarbonsChlorinatioadlorinedlorine Radiolsotopesdloroformdlarophylldlorophyll Adlorophytadromatography

dromium RadloisotopesdrysophytadubsdutesCichlidCirquesCiscoCisternsCItrobacterCitrus FruitsCivil DefenseCivil EngineeringCivil LawCladophoraClamsClarificationClarified WastewaterdarifiersClassificationClay LoamClay MineralsClaysCleaningCleanupCleanup OperationsClear WellsClear-cuttingClimatesClimatic DataClimatic ZonesClimatologyCUttolimnionCloggingClosed BasinsClosed LakesClosed SystemsClosed-conduit FlowClostridfumCloud CoverGond PhysicsCloud SeedingCloudburstsCloudsCloversCoagulationCoalCoal GasificationCoal MinesCoal MiningCoalescenceCoastal AquifersCoastal EngineeringCoastal MarshesCoastal Plains

Conductance

Coastal StreamsCoastal WatersCoastal Zone ManagementCoaster GatesCoastsCoatingsCobaltCobalt RadloisotopesCoelenteratesCofferdamsCohesionCoheslonless SoilsCohesive SoilsCold RegionsCold ResistanceCold SpringsCold Weather ConstructionColiformsCollapseColloidsCollnvial SoilsColorColor RemovalColorimetryCombination WellsCombined Sewer OverflowsCombined SewersCombined TreatmentCombined WastewaterCombined WaterCommercial FishingCommon LawCommunicationCommunity DevelopmentCompacted SoilsCompactionComparison StudiesCompensating ReservoirsCompensationCompeting UseComplete Wastewater

TreatmentComposite Unit Hydrographs CompostingCompound Hydrographs Comprehensive Planning Compressed Air Compressibility Compressible Flow Compressive Strength Computer Models Computer Programs Computers Concentration Time Concrete Additives Concrete Construction Concrete Dams Concrete Mixes Concrete Plants Concrete Technology Concrete Testing Concretes Condemnation Condemnation Value Condensates Condensation Condensers Conductance

D-3

Conduction WATER RESOURCES THESAURUS

ConductionConductivityConduitsConferencesConfined AquifersConfined GroundwaterConfined-water WellsConfinement PensConfining BedsConfluent StreamsConglomerate RocksConiferous ForestsConifersConjunctive UseConnate WaterConsequent StreamsConservationConservation StorageConsolidation SedimentationConstitutional LawConstructionConstruction CostsConstruction EquipmentConstruction JointsConstruction MaterialsConstruction MethodsConsumptive UseContact BedsContact FiltersContact SpringsContact StabilizationContaminationContiguous ZoneContinental BasinsContinental HydrologyContinental MarginContinental ShelfContinental SlopeContinuity EquationContinuous FlowContinuous StreamsContour IrrigationContour TerracingContoursContractsControl FlumesControl SystemsControlled DrainageControlled StorageConvectionConvective PrecipitationConveyance StructuresCoolantsCoolingCooling PondsCooling TowersCooling WaterCooperativesCopepodsCopperCopper CompoundsCopper SulfateCoralsCore DrillingCore LoggingCoresCoriolls ForceCorn

Cora BeltCorrelation AnalysisCorrelation CoefficientCorrosionCorrosion ControlCorynebacteriumCoat AllocationCost AnalysisCost Repayment .Cost SharingCost-benefit AnalysisCostaCottonCottonwood TreesCover CropsCozsaclde VirusCrabsCracksCranberriesGrappleCratersCrayfishCreepCreosoteCrest GageaCrib DamsCritical DepthCritical DischargeCritical FlowCritical VelocityCrop ProductionCrop YieldCroplandCross sectionsCrude OilCrustaceansCryogenicsCryologyCrystal GrowthCrystalline RocksCrystallisationCrystallographyCrystalsCultivated LandsCultivationCultural ControlCulture MediaCulturesCultming TechniquesCulvertsCumulative RunoffCuringCurrent MetersCuticolar TranspirationCutoffsCutting ManagementCyanideCyanophytaCyclic StorageCycling NutrientsCyclonesCyclonic PrecipitationCyclotella

DDaily Hydrographs

Daily StorageDairy IndustryDalaponDam ConstructionDam DesignDam EffectsDam FailureDam FoundationsDam StabilityDamageDamsDamsitesDaphnlaDarcy-Weisbach EquationDarcysLawData AcquisitionData CollectionsData InterpretationData ProcessingData Storage and RetrievalData TransmissionDatingDDDDDEDOTDead LoadsDead StorageDead WellsDebris BasinsDebris ConeDebtDedduonf ForestsDeciduous TreesDecision MakingDecomposing Organic MatterDecompositionDecontaminationDeep PercolationDeep SeepageDeep WaterDeep WellsDeep-water HabitatsDeerDeficient ElementsDeflectionDefoliantsDeformationDegradationDegradation ProductsDehydrationDehydrogenaaeDeicersDeltasDemineraliaationDemonstration FarmsDemonstration WatershedsDendrochronologyDenitriflcatioaDensityDensity CurrentsDensity StratificationDenudationDepletionDepositionDepreciationDepressed SewersDepression HeadDepression Springs

Depression StorageDepth-area-duration AnalysisDesalinationDesalination ApparatusDesalination PlantsDesalination WastesDesert PlantsDesertsDesiccantsDesign CriteriaDesign FloodsDesign FlowDesign StandardsDesign StormsDesiltingDesUting BasinsDesmidsDestratiflcationDetection LimitsDetection TimesDetention DamsDetention ReservoirsDetention TimeDetergentsDeteriorationDetoxificationDetritusDeuteriumDeveloping CountriesDewDewaterlngDewpointDtagenesisDialysisDiatomaceous EarthDiatomsDiaslnonDleldrinDietsDifferential EquationsDifferential Thermal AnalysisDiffusion CoefficientDigested SludgeDigestionDigital ComputersDikesDimensional AnalysisDimple SpringsDiaoflagellatesDiquatDirect FlowDirect IrrigationDisastersDischarge CapacityDischarge CoefficientDischarge FrequencyDischarge HydrographsDischarge MeasurementDiscount RatesDiseasesDiseconomies of ScaleDisinfectionDlspersantsDisposal WellsDissolved OxygenDissolved SolidsDistillationDistilled Water

D-4

DESCRIPTORS Excess Water

DistributionDistribution GraphsDistribution PatternsDistribution ReservoirsDitch GrassDitch LiningsDitchesDiurnsi DistributionDturonDiversionDiversion ChannelsDiversion DamsDiversion DitchesDiversion LossesDiversion StructuresDobsonfUesDocksDocumentationDolomiteDomestic AnimalsDomestic Wastes .Domestic WaterDownstreamDragDragonfllesDrain SpacingDrainageDrainage AreaDrainage CanalsDrainage CoefficientDrainage DensityDrainage DistrictsDrainage DitchesDrainage EffectsDrainage EngineeringDrainage EquilibriumDrainage PatternsDrainage PracticesDrainage ProgramsDrainage SystemsDrainage TerraceDrainage WaterDrainage WellsDrainsDrawdownDredgingDrift BottlesDrifting SnowDriftwoodDrill HolesDrill MonitorsDrillers LogsDrillingDrilling EquipmentDrilling FluidsDrilling RateDrilling SamplesDrinking WaterDrip IrrigationDriving HeadDroughtDrought ResistanceDrowningDrugsDrumDry FarmingDry MatterDry Wells

DryingDual Purpose PlantsDucksDuckweedDuctilityDug WellsDunalliellaDunesDupnit-Forchheimer TheoryDurabilityDust StormsDustsDye ConcentrationsDye DispersionDye Industry WastesDye ReleasesDyesDynamic ProgrammingDynamicsDystrophic LakesDystrophy

Effluents

EEarly Impoundment Earth Dams Earth Pressure Earth-water Interfaces Earthquake Engineering Earthquake Flood Earthquakes Earthworks Easements Echinoderms Ecological Distribution Ecological Effects Ecology Econometrics Economic Aspects Economic Development Economic Efficiency Economic Evaluation Economic Feasibility Economic Growth Economic Impact Economic Justification Economic Life Economic Prediction Economic Rent Economic Yield Economies of Scale Ecosystems Ecotypes EddiesEddy Diffusion Education EelEffective Capacity Effective Porosity Effective Precipitation Effective Storage Effective Velocity Effluent Charges Effluent Limitations Effluent Seepage Effluent Streams

Elastic Properties Elasticity of Demand Elasticity of Supply Elastomers Electric Currents Electric Fields Electric Potential Electric Power Electric Power Costs Electric Power Demand Electric Power Failure Electric Power Industry Electric Power Production Electric Power Rates Electric Powerplants Electrical Engineering Electrical Equipment Electrical Grounding Electrical Networks Electrical Properties Electrical Studies Electrical Transmission Electrical Well Logging Electro-osmosis Electrochemistry Electrodes Electrodialysis Electrolysis Electrolytes Electromagnetic Waves Electron Capture Gas

Chromatography Electron Microscopy Electronic Equipment Electrophoresis Electroplating Elevation ElodeaEmbankments Embryonic Growth Stage Eminent Domain Emission Spectroscopy Employee Relations Employment Emulsiflers Emulsions Encroachment Endrin EnergyEnergy Conversion Energy Dissipation Energy Equation Energy Gradient Energy Loss Energy Sources Energy Transfer Enforcement Engineering Engineering Geology Engineering Personnel Enrichment Enteric Bacteria Enterobacter Enterovtruses Enthalpy Eatrainment

Entropy Environment Environmental Control Environmental Effects Environmental Engineering Environmental Gradient Environmental Impact

StatementEnvironmental Policy Environmental Protection Environmental Quality . Environmental Sanitation Environmental Tracers Enzymes Ephemeral Lakes Ephemeral Streams Epidemics Epidemiology Epidermis Epilintnion Epiphytes Epiaootiology Epoxy Resins Equalising Basins Equalising Reservoirs EquilibriumEquitable Apportionment Erection ErosionErosion Control Erosion Rates Error Analysis Errors ERTSEscherichia Coll Essential Nutrients EstersEstimated Costs Estimating Estimating Equations EstuariesEstuariae Environment Estuarine Fisheries Ethers Ethics Euglena Euglenophyta Euphotic Zone Eutrophic Lakes Eutrophication

. Evaluation Evanescent Lakes Evaporation Evaporation Area Evaporation Control Evaporation Discharge Evaporation Gages Evaporation Pans Evaporation Rate Evaporators Evaporlmeters Evapotranspiration Evapotranspiration Control Evapotranspiration Potential Evolution Excavation Excess Rainfall Excess Water

D-5

Excretion WATER RESOURCES THESAURUS

Excretion Expansion Expansive Clays Expansive Soils Expenditures Experimental Basins Experimental Data Experimental Design Experimental Farms Exploitation Exploration Explosions Explosives ExportExtensometers Extrusion Flow

FabricationFabricsFactor AnalysisFall VelocityFalling StageFalloutFallowingFarm EquipmentFarm LagoonsFarm ManagementFarm PondsFarm WastesFarmingFarmsFate of PollutantsFathead MinnowsFathometersFatigueFatty AddsFault SpringsFaunaFeasibility StudiesFecesFederal JurisdictionFeeding RatesFeedlot RunoffFeedldt WastesFeedlotsFeedsFeedwater TreatmentFencesFensFermentationFerrobacillnsFertilityFertilizationFertilizersFescuesFetchFiber CropsFibrous BedsField CapacityField DitchesField TestsField WastesFill PermitsFilms

Filter CribsFilter CropsFilter MediaFilter RateFiltered WastewaterFiltered-water ReservoirsFiltersFiltrateFiltrationFiltration SpringsFinancial FeasibilityFinancingFinite Difference MethodsFinite Element MethodFir TreesPirnFishFish BarriersFish BehaviorFish ConservationFish Control AgentsFish DietsFish Diseases , .Fish EggsFish EstablishmentFish FarmingFish FoodFish Food OrganismsFish GuidingFish Handling FacilitiesFish HarvestFish HatcheriesFUn LaddersFish ManagementFish MigrationFish ParasitesFish PassagesFish PhysiologyFish PondsFish PopulationsFish StockingFish ToxinsFisheriesFishingFishing GearFishkillFissure WaterFixed DamsFixed GroundwaterFixed Wheel GatesFjordsFlagellatesFlame PhotometryFlash DistillationFlash EvaporationFlash FloodsFlashy StreamsFlavobacterinmFlexibilityFloatingFloating IceFloating PlantsFloatsFlocculation ,Flood BasinsFlood BenefitsFlood ChannelsFlood Control

Flood CrestFlood DamageFlood DataFlood DischargeFlood FlowFlood ForecastingFlood FrequencyFlood HydrographsFlood IrrigationFlood PeakFlood Plain ManagementFlood Plain ZoningFlood PlainsFlood ProfilesFlood ProtectionFlood Recurrence IntervalFlood RoutingFlood SpreadingFlood StagesFlood WavesFlood-control StorageFloodgatesFloodingFloodprooflngFloodsFloodwaterFloodwaysFloraFlotationFlotsamFloundersFlowFlow Around ObjectsFlow AugmentationFlow BogsFlow ChannelsFlow CharacteristicsFlow ControlFlow DischargeFlow DurationFlow FrictionFlow Index.Flow MeasurementFlow NetsFlow PatternFlow ProfilesFlow RatesFlow RegulatorsFlow ResistanceFlow SeparationFlow SystemHow VelocityFloweringFlowing WellsFtowmeters

Fluid DropsFluid FlowFluid MechanicsFltddlzed Bed ProcessFluidlzed BedsFlumesFluorescenceFlnoridatioaFlnoridesFluorineFlnorometryFlushing

Fluvial Sediments Fly AshFoam Separation Foaming Fodder FogFood Chains Food HabitsFood Processing Industry Food-processing Wastes Foods Forages Foraminifera Forced Drying Forebsys Forecasting Foreign Construction Foreign Design Practices Foreign Projects Foreign Research Foreign Trade Foreign Waters Forest Fires Forest Hydrology Forest Management Forest Soils Forest Watersheds Forestry Forests Fortran FoulingFoundation Failure Foundation Rocks Fourier Analysis Fracture Permeability FragUaria Frail Lands Frazil Ice Free Surfaces Free Water Freeze Drying Freeze-thaw Tests FreezingFrequency Analysis Frequency Distribution Friction Friction Loss Fringe Water Frogs FrostFrost Heaving Frost Prevention Frost Protection Frost Thrusting Frothing Fronde Number Frozen Ground Fruit Crops Fnctts

.FuelFuel Reprocessing Fugitive Water Fully Penetrating Wells FulvicAddsPttBufltUNVFungi Fungicides Funicular Water

D-6

DESCRIPTORS HydrogenFurrow Drainage Farrow Irrigation Furrows Fusarium Future Planning Fyke Nets

GabionsGagesGagingGaging StationsGambosiaGamma RadiationGammarasGarGarbage DumpsGas ChromatographyGas Liquid ChromatographyGasificationGasolineGastropodsGatesGeeseGelsGeochemistryGeographyGeohydrologic BoundariesGeohydrologic UnitsGeohydrologyGeologic ControlGeologic ErosionGeologic FissuresGeologic FormationsGeologic FracturesGeologic HistoryGeologic JointsGeologic MappingGeologic TimeGeologic UnitsGeological SurreysGeological TerracesGeologyGeomorphologyGeophysicsGeothermal PowerGeothermal ResourcesGeothermal StudiesGeotropismGerminationGeysersGill NetsGillsGlacial AquifersGlacial DriftGlacial LakesGlacial SedimentsGlacial SoilsGlacial StreamsGlaciationGlacier BalanceGlacier Mass BalanceGlacier SurgesGlaciersGlaciohydrology

GladologyGlucoseGoatsGoldGold RadioisotopesGoldfishGolf CoursesGomphonemaGonyaulazGovernment FinanceGoTernment SupportsGovernmental InterrelationsGraded StreamsGradingGradually-varied FlowGrain CropsGrama GrassesGranitesGrantsGraphical AnalysisGraphical MethodsGrassed WaterwaysGrassesGrasslandsGravelGravel PackingGravity DamsGravity FiltersGravity FlowGravity GroundwaterGravity SpringsGravity StudiesGravity WavesGrazingGreaseGreenhousesGroinsGross National ProductGround IceGroundwaterGroundwater AvailabilityGroundwater BarriersGroundwater BasinsGroundwater BudgetGroundwater DatingGroundwater DepletionGroundwater DivideGroundwater IrrigationGroundwater LevelGroundwater ManagementGroundwater MiningGroundwater MovementGroundwater PollutionGroundwater PotentialGroundwater RecessionGroundwater RechargeGroundwater ReservoirsGroundwater RunoffGroundwater StorageGroundwater WavesGroutingGrowthGrowth ChambersGrowth KineticsGrowth MediaGrowth RatesGrowth StagesGulfs

GulliesGullsGully ErosionGuniteGnppiesGymnodiniumGypsum

HHabitatsHailHalidesHalogenated PesticidesHalogensHalogetonHalophytesHandbooksHarborsHardnessHardpan SoilsHardpan SpringsHardwoodHatchingHayHazardous MaterialsHazardsHazen-Williams EquationHead FlumesHead LossHeadwater ControlHeadwatersHeatHeat BalanceHeat BudgetHeat ExchangersHeat FlowHeat ResistanceHeat TransferHeat TreatmentHeat-capacity MethodHeated WaterHeatingHeavingHeavy MetalsHeavy WaterHeliumHemlock TreesHeptachlorHerbicidesHerringHeterogeneityHeterotrophic BacteriaHigh FlowHigh PressureHigh Pressure GatesHigh VoltageHigh Water MarkHighway BeautiflcationHighway EffectsHighway IcingHighway RelocationHighwaysHistogramsHistologyHistoric Floods

History Hoar Frost HogsHoldover Storage Hollow Dams Holomictic Lakes Homogeneity Horizontal Wells Horticulture Hoitons Law Hospitals Hot Springs Housing Human Diseases Human Pathology Human Physiology Human Population Humic Acids Humid Areas Humid Climates Humidity Humus Sludge Hunting Hurricanes Hybrid Computers Hydrants Hydrate Processes Hydrates HydrationHydraulic Conductivity Hydraulic Design Hydraulic Engineering Hydraulic Equipment Hydraulic Fill Hydraulic Fracturing Hydraulic Friction Hydraulic Gates Hydraulic Geometry Hydraulic Grade Hydraulic Gradient Hydraulic Jump Hydraulic Loading Hydraulic Loss Hydraulic Machinery Hydraulic Mining Hydraulic Models Hydraulic Permeability Hydraulic Profiles Hydraulic Properties Hydraulic Radius Hydraulic Roughness Hydraulic Similitude Hydraulic Structures Hydraulic Systems Hydraulic Transients Hydraulic Transportation Hydraulic Turbines Hydraulic Valves Hydraulic-fill Dams Hydraulics Hydrobiology Hydrocarbons Hydrochloric Acid Hydrodynamics Hydroelectric Plants Hydroelectric Power Hydrofoils Hydrogen

D-7

Hydrogen Ion Concentration WATER RESOURCES THESAURUS

Hydrogen Ion Concentration Hydrogen Sulfide ^ Hydrogenation Hydrograph Analysis Hydrographs Hydrography Hydrologic Aspects Hydrologic Budget Hydrologic Cycle Hydrologic Data Hydrologic Data Collections Hydrologic Equation Hydrologic Maps Hydrologic Models Hydrologic Properties Hydrologic Systems Hydrological Regime Hydrology Hydrolysis Hydrometeorology Hydrometers Hydrometric Stations Hydrometry Hydrophase Diagrams Hydrophones Hydrophytes Hydroponics Hydrostatic Level Hydrostatic Pressure Hydrothermal Studies Hyetographs Hygrometry Hygroscopic Coefficient Hygroscopic Moisture Hygroscopic Water Hyperfiltration Hypolimnion Hypsometric Analysis Hysteresis

IceIce BreakupIce CoverIce DriftIce FogIce FormationIce JamsIce LensesIce LoadsIce PressureIce RunIce SkatingIce ThicknessIce-brine SystemsIce-water InterfacesIcebergsIced LakesIgneous RocksIlliteImmature Growth StageImmiscibilityImpaired Water QualityImpaired Water UseImpedance

ImpellersImpervious BedsImpervious BoundariesImpervious MembranesImpervious SoilsImportImported WaterIn Situ TestsIn-bank CapacityIncinerationIncised RiversIncomeIncome DistributionIncubationIndexingIndicatorsIndirect Flood MeasurementInduced InfiltrationIndustrial DevelopmentIndustrial PlantsIndustrial ProductionIndustrial WastesIndustrial WastewaterIndustrial WaterInfectionInfiltrationInfiltration CapacityInfiltration CoefficientInfiltration DiversionInfiltration IndexInfiltration RateInfiltrometersInfluence BasinsInfluent SeepageInfluent StreamsInfluent WaterInformation ExchangeInformation RetrievalInformation SystemsInfrared ImageryInfrared RadiationInfrared SpectroscopyInhibitionInhibitorsInitial PrecipitationInjectionInjection WellsInjunctionsInjunctive ReliefInland WaterwaysInlet WellsInletsInorganic AcidsInorganic CompoundsInorganic PesticidesInput-output AnalysisInsect BehaviorInsect ControlInsecticidesInsectsInspectionInstallationInstitutional ConstraintsInstitutionsInstream AerationInstream FlowInsular SlopesInsulated Streams

Insulation Insurance Intake Gates IntakesInteragency Cooperation Interbasin Transfers Intercepting Channels Intercepting Ditches Interception Interception Loss Interceptor Sewers Interdisciplinary Studies Interest Rates Interfaces Interferometry Intermediate Water Intermittent Filters Intermittent Lakes Intermittent Springs Intermittent Streams Internal Water Internal Waves International Agreements International Commissions International Hydrological

DecadeInternational Law International Waters Interrupted Streams Interrupted Water Table Interstate Commissions Interstate Compacts Interstate Rivers Interstice Interstitial Ice Interstitial Water Intertidal Areas Invertebrates Inverted Capacity Inverted Wells Investment Iodides IodineIodine Radioisotopes Ion Exchange Ion Transport Ion-selective Electrodes Ionic Interference lonization Ions IronIron Bacteria Iron Compounds Iron Oxides Iron Radioisotopes Irradiation Irrigable Land Irrigation Irrigation Canals Irrigation Design Irrigation Districts Irrigation Ditches Irrigation Effects Irrigation Efficiency Irrigation Engineering Irrigation Operation Irrigation Permits Irrigation Practices

Irrigation ProgramsIrrigation RequirementsIrrigation WaterIrrigation WellsIrrigation-return FlowIsohyetsIsolationIsopodsIsothermsIsotope FractionationIsotope StudiesIsotopic TracersIsotropy

Jelly FishJetsJetsamJettiesJettingJudicial DecisionsJuniper TreesJurisdictionJuvenile Growth StageJuvenile Water

KKaoliniteKarstKarst HydrologyKelpsKidneysKillifishKinematic ViscosityKinematic Wave TheoryKinematic WavesKinetic EnergyKineticsKjeldahl ProcedureKlebsiellaKnoll SpringsKraft MillsKrypton Radioisotopes

LaborLabor UnionsLaboratoriesLaboratory Ai|inn»i«Laboratory EquipmentLactobacillusLagoonsLake BasinsLake BedsLake Bottom SpringsLake BreezesLake ClassificationLake EvaporationLake Fisheries

D-8

DESCRIPTORS Mixolimnion

Lake IceLake MorphologyLake MorphometryLake RestorationLake SedimentsLake ShoresLake StagesLakesLaminar FlowLampreyLand AcquisitionLand Application'Land AppraisalsLand ClassificationLand ClearingLand DevelopmentLand DisposalLand FormingLand ManagementLand ReclamationLand ResourcesLand RightsLand TenureLand UseLandfillsLandscapingLandslidesLaplace EquationLarge WatershedsLarvaeLarval Growth StageLarvicidesLasersLate ImpoundmentLatent HeatLateral SewersLateritesLatitudinal StudiesLaunderingLavaLaw EnforcementLaw of the SeaLawnsLeachatesLeachingLeadLead RadioisotopesLeakageLeaky AquifersLeaky BoundariesLeasesLeast Squares MethodLeavesLegal AspectsLegal ReviewLegislationLegumesLentic EnvironmentLeontief ModelsLethal LimitLettuceLeveesLiabilityLibrariesLicensesLicensingLichensLife Cycles

Life History StudiesLight IntensityLight PenetrationLight QualityLighthousesLightingLightningLightweight AggregatesLigniteLimeLimestoneLimiting FactorsLimiting NutrientsLimnologyLindaneLinear Alkyl SulfonatesLinear ProgrammingLiningsLipidsLiquefactionLiquid LimitsLiquid SludgeLiquid WastesListing BasinsLiterature ReviewLithificationLithiumLithologic LogsLitterLittoral DriftLittoral EnvironmentLittoral ZoneLiverLivestockLoad DistributionLoamLoansLobstersLocal GovernmentsLocal PrecipitationLocksLoessLoggingLogging (Recording)Long-term PlanningLongshore CurrentsLotic EnvironmentLow FlowLow Water MarkLow-flow AugmentationLubricantsLumberLumber IndustryLysimeters

MMacroinvertebratesMacrophytesMagmatic WaterMagnesiumMagnesium CarbonateMagnesium CompoundsMagnesium HydroxideMagnetic StudiesMain Sewers

MaintenanceMaintenance CostsMalathionMalendavesMammalsManagement PlanningManganeseManganese RadioisotopesMangrove SwampsMannings EquationManometersManpowerManureMaple TreesMappingMapsMarginal CostsMarinasMarine AlgaeMarine AnimalsMarine BacteriaMarine BiologyMarine ClimatesMarine EnvironmentMarine FisheriesMarine GeologyMarine PlantsMarine ResourcesMarine SedimentsMarket ValueMarketingMarking TechniquesMarkov ProcessMarlMarsh ManagementMarsh PlantsMarshesMass ConcreteMass SpectraMass SpectrometryMass TransferMass WastingMaterials EngineeringMaterials TestingMathematical AnalysisMathematical EquationsMathematical ModelsMathematical StudiesMature Growth StageMature RiversMaximum Available WaterMaximum FlowMaximum Probable FloodsMayfliesMeadowsMeander BeltMeandersMeasuring InstrumentsMeat Processing IndustryMechanical ControlMechanical EngineeringMechanical EquipmentMechanical FailureMedian Tolerance LimitMedicinal SpringsMelosiraMeltingMembrane Filters

Membrane ProcessesMembranes 'MenhadenMercuryMeromictic LakesMeromixisMesophytesMesotrophic Lakes

. MesotrophyMesozoic EraMesqulteMetabolismMetabolitesMetal ComplexesMetal Organic PesticidesMetal-finishing WastesMetallurgyMetalsMetamorphic RocksMetamorphic WaterMeteoric WaterMeteorological Data

CollectionMethaneMethane BacteriaMethanolMethoxychlorMethylationMethylmercuryMetropolitan Water

ManagementMiceMicrobial DegradationMicrobiological StudiesMicroclimateMicroclimatologyMicrocystisMicroenvironmentMicrometeorologyMicroorganism*Microscopic AnalysisMicroscopyMicrowavesMidgesMigrationMildewsMilkMill DamsMillsMine DrainageMine WastesMineral IndustryMineral SpringsMineral WaterMineralizationMineralogyMineralsMinimum FlowMining EngineeringMinkMistMist IrrigationMitesMiticidesMixed ForestsMixed Liquor SolidsMixingMixolimnion

D-9

Mode of Action WATER RESOURCES THESAURUS

Mode of ActionModel StudiesModel TestingMohr CircleMohr EnvelopeMohr Failure TheoryMoistureMoisture AvailabilityMoisture ContentMoisture DeficiencyMoisture DensityMoisture EquivalentMoisture GradientMoisture IndexMoisture MetersMoisture ProbeMoisture ProfilesMoisture StressMoisture TensionMoisture UptakeMoldsMole DrainageMolecular StructureMollusdcidesMollnsksMolybdenumMomentum EquationMomentum TransferMonetary ReturnsMonimolimnionMonitoringMonomolecular FilmsMonopolyMonsoonsMonte Carlo MethodMonthly DistributionMontmorilloniteMonuronMorainesMorbidityMorphologyMortalityMortarMosquitoesMossesMost Probable Number TestMotivationMountain LakesMountainsMovable DamsMuck SoilsMudMud FlatsMud SpringsMud WareMud-water InterfacesMudflowsMulchesMulchingMulletMnltieffect DistillationMnltiobjective PlanningMultiphase HowMultiple Arch DamsMultipurpose ProjectsMultipurpose ReservoirsMultiresenroir NetworksMultistage Flash Distillation

Multivariate AnalysisMunicipal WastesMunicipal WastewaterMunicipal WaterMuscleMuskegMuskratsMusselsMycobacterinmMyriophyllumMytilusMyxobacteria

NNausea BottlesNational ParksNatural FlowNatural Flow DoctrineNatural GasNatural LeveesNatural RechargeNatural ResourcesNatural SlopeNatural StreamsNatural UseNatural Water TableNatural WatercoursesNatural WatersNatural WellsNaval ArchitectureNavigable RiversNavigable WatersNavigationNavigation CanalsNavigation ObstructionsNeap TidesNeanhore ProcessesNeedle DamsNegative WellsNegligenceNegotiationsNematodesNeritic EnvironmentNestingNet RadiationNet RainfallNetsNetwork DesignNetworksNeutralizationNeutron AbsorptionNeutron Activation AnalysisNew SnowNichesNickelNitratesNitrificationNitrilotriacetic AddNitritesNitrogenNitrogen CompoundsNitrogen CycleNitrogen FixationNitrogen Fixing BacteriaNitrogen Removal

NItzschiaNoiseNonconsnmptive UseNondestructive TestsNonlonic SurfactantsNonlinear ProgrammingNonnavigable WatersNonnewtonian FlowNonperennial StreamsNonpoint Pollution SourcesNonstructnral AlternativesNontidal CurrentsNonuniform FlowNostocNozzlesNndear EnergyNuclear EngineeringNndear ExplosionsNndear Magnetic ResonanceNndear MetersNndear Moisture MetersNndear PhysicsNudear PowerplantsNndear ReactorsNudeationNuisanceNuisance AlgaeNumerical AnalysisNutrient RemovalNutrient RequirementsNutrientsNutritionNuts

OOak TreesOatsObjective FunctionObservation WellsObstruction to FlowOccupationsOcean BottomOcean CirculationOcean DumpingOcean WavesOceanographyOchromonasOdor ControlOdor-producing AlgaeOdorsOffshore PlatformsOilOil CharacterizationOil Field*Oil IndustryOU PollutionOil RecoveryOil RefineriesOil ReservoirsOil ShaleOil SkimmersOil SlicksOil SpillsOil TankersOil Wastes

Oil WellsOil-water InterfacesOilseed CropsOily WaterOld SnowOligochaetesOligotrophic LakesOligotrophyOn-site Data CollectionsOn-site InvestigationsOn-site TestsOnionsOozeOpacityOpen ChannelsOpen Space.Open WellsOpen-channel DrainageOpen-channel FlowOperating CostsOperating PolidesOperation WastesOptical PropertiesOptimal YieldOptimizationOptimum Development PlansOrchardgrassOrchardsOrdinancesOrganic AddsOrganic CarbonOrganic CompoundsOrganic-LoadingOrganic MatterOrganic PesticidesOrganic SoilsOrganic SolventsOrganic WastesOrganizationsOrganoleptic PropertiesOrganophosphorus

CompoundsOrganophosphorus Pesticides Orifice Flow Orifices Ornamentals Orographic Precipitation Orography Orthophosphates Osdllatoria Oscillatory Waves OsmosisOsmotic Pressure Ostracods Otters OutfallOutfall Sewers Outlet Channels Outlets Outwash Overburden Overdraft Overfalls OverflowOverflow Channels Overland Flow Overlying Proprietor Ownership of Beds

D-10

DESCRIPTORS Principal Component Analysis

Oxbow LakesOxidationOxidation DitchesOxidation LagoonsOxidation PondsOxidation ProcessOxidation-reduction PotentialOxidesOxidixed WastewaterOxygenOxygen BalanceOxygen DeficitOxygen DemandOxygen DepletionOxygen IsotopesOxygen RequirementsOxygen SagOxygen TransferOxygen UptakeOxygenationOystersOzonationOzone

Packed BedsPaleodimatologyPaleohydrologyPaleolimnologyPaleosolsPaleozoic EnPalynologyPan EvaporationParametric HydrologyParaquatParasitesParasitismParathionPareto OptimalityParksPartial DiversionPartially Penetrating WellsParticipating FundsParticle ShapeParticle SizeParticulate MatterPasture ManagementPasturesPatentsPath of PollutantsPathogenic BacteriaPathogenic FungiPathogensPathologyPavingPaymentPeachesPeak DemandPeak LoadsPeaking CapacityPeanutsPeatPeat BogsPeat SoilsPelllcular Water

Peilicular ZonePendnlar WaterPenstocksPeptidesPerchPerched AquifersPerched GroundwaterPerched HorizonPerched SpringsPerched StreamsPerched WaterPerched Water TablePercolating FiltersPercolating WaterPercolationPercolation RatePerennial RyegrassPerennial SpringsPerennial StreamsPerformance EvaluationPeridiniumPerlitePermafrostPermeabilityPermeability CoefficientPermeamctersPermitsPermselective MembranesPersonnelPersonnel ManagementPervious SoilsPesticide DriftPesticide KineticsPesticide ResiduesPesticide ToxidtyPesticidesPetrofabricsPetrographyPetroleum ProductsPetrologyPhaeophytaPhase DiagramsPhenolic PesticidesPhenologyPhenolsPhosphatesPhosphorusPhosphorus CompoundsPhosphorus RadloisotopesPhosphorus RemovalPhosphothioate PesticidesPhotoactivatioaPhotognmmetryPhotographyPhotometryPhotoperiodismPhotosynthesisPhotosynthetic BacteriaPhototropismPhreatophytesPhytogenyPhysical AnalysisPhysical ControlPhysical PropertiesPhysicochemical PropertiesPhysicochemical TreatmentPhysiographic BalancePhysiographic Provinces

Physiological EcologyPhytometersPhytoplanktonPhytotoxidtyPiersPiezometersPtezometric-HeadPiezometryPigmentsPikePilesPilot PlantsPine TreesPipe FlowPipelinesPipesPlsdddesPit RechargePlacer MiningPlane FlowPlanktonPlankton NetsPlanningPlant DiseasesPlant FibersPlant GrowthPlant Growth SubstancesPlant MorphologyPlant PathologyPlant PhysiologyPlant PopulationsPlant TissuesPlant VirusesPlant Water PotentialPlanting ManagementPlastidtyPlasticsPlatyhelminthesPlayasPlerotic GroundwaterPlerotic WaterPlug FlowPlumbingPlumesPlutonic Water

PlutoniumPocket SpringsPodzolaPoised StreamsPoisonsPoisson RatioPolar RegionsPolarityPolarizationPolarographic AnalysisPoldersPolice PowerPolicy MakingPolitical Aspects.Political ConstraintsPollenPollutant IdentificationPollutantsPollution IndexPollution LoadPollution TaxesPolychaetesPolychlorinated Biphenyls

Polyelectrolytes Polymers

Ponded StreamsPondingPondsPontoonsPopulation DensityPopulation DynamicsPopulation EquivalentsPopulation ExposurePopulationsPore PressurePore SizePore WaterPoresPorosityPorous MediaPort AuthoritiesPort FacilitiesPortland CementsPostimpoundmentPotable WaterPotashPotassiumPotassium CompoundsPotassium RadioisotopesPotatoesPotential FlowPotential Water SupplyPotentiometersPotentiometric LevelPotholesPoultryPower HeadPowerplantsPozzolansPrairiesPrecambrian EraPrecast ConcretePredpitationPredpitatioa ExcessPredpitation IntensityPrecipitation RatePredpitation ScavengingPrecisionPredationPredictionPreimpoundmentPrescriptive RightsPreservationPressure ConduitsPressure DistributionPressure HeadPressure IcePressure*measuring

InstrumentsPressurized Water Reactors Prestressed Concrete Pretreatment of Water Prices PricingPrimary Productivity Primary Sludge Primary Wastewater

Treatment Primary Waves Principal Component Analysis

D-ll

Priorities WATER RESOURCES THESAURUS

PrioritiesProbabilistic ProcessProbability DistributionProbable Maximum

PrecipitationProcess ControlProcess WaterProdnctiTityProfessional PersonnelProfessional SocietiesProfilesProrttProgressive TaxesProject PlanningProjectionsPropanePropellersProperty BoundariesProperty RightsProperty ValueProprietary PowerProtectionProteinsProteusPrototype TestsPrototypesProtozoaProvenancePseudomonasPublic AccessPublic HealthPublic InvestmentPublic LandsPublic NuisancePublic OpinionPublic ParticipationPublic PolicyPublic RelationsPublic RightsPublic Trust DoctrinePublic Utility DistrictsPublic WatersPublicationsPuddlingPulp and Paper IndustryPulp WashingPulp WastesPump TestingPump TurbinesPump WellsPumpagePumped StoragePumpingPumping HeadPumping PlantsPumping TestsPumpsPyritePyrrophyta

QQuality ControlQuantitative AnalysisQuarriesQuartz

Queueing TheoryQuick Clays

RabbitbushRadarRadial GatesRadial WellsRadiationRadio InterferenceRadio WavesRadioactive DatingRadioactive HalMifeRadioactive SpringsRadioactive TracersRadioactive Waste DisposalRadioactive WastesRadioactive Well LoggingRadioactivityRadioactivity EffectsRadioactivity TechniquesRadiochcmical AnalysisRadioecologyRadioisotopesRadlometryRadiosondesRadium RadioisotopesRailroadsRainRain Forests'Rain GagesRainfallRainfall AreaRainfall DispositionRainfall DistributionRainfall ImpactRainfall IndexRainfall InfiltrationRainfall IntensityRainfall PenetrationRainfall RateRainfall SimulatorsRainfall-runoff RelationshipsRainstormsRange GrassesRange ManagementRapid ExcavationRapid FlowRare Earth ElementsRate of ReturnRating FlumesRational FormulaRavinesRaw WastewaterRaw WaterReachReagentsReal PropertyReasonable UseRecessionRecession CurveRechargeRecharge BasinsRecharge PondsRecharge Wells

Redrculated WaterReclaimed WaterReclamationRecreationRecreation DemandRecreation FacilitiesRecreation WastesRecyclingRed TideReefsReflectanceReforestationRefractivltyRefrigerationRegenerated WaterRegenerationRegime ChannelsRegime StreamsRegional AnalysisRegional DevelopmentRegional FloodsRegional PlanningRegression AnalysisRegressive TaxesRegulated FlowRegulationsRehabilitationReinforced ConcreteRelative HumidityRelative RightsRelaxation MethodRelief SewersRelief WellsRelocationRemediesRemote ControlRemote SensingRepellentsReplenishmentRepresentative BasinsReprodncibilityRepulsionResearch FacilitiesResearch PrioritiesReservation DoctrineReservoir CapacityReservoir ConstructionReservoir DesignReservoir EvaporationReservoir FisheriesReservoir LiningsReservoir OperationReservoir ReleasesReservoir SiltingReservoir SitesReservoir SitingReservoir StagesReservoir StorageReservoir YieldReservoirsResidual ChlorineResidual OxygenResidual SoilsResinsResistanceResistance NetworksResistivityResonance

Resource AllocationResources DevelopmentHfmtittrfff N^ Iftfff limit

RespirationRetaining WallsRetardanceRetardantsRetarded FlowRetarding BasinsRetentionRetention CapacityRetention TimeReturn FlowReturn WaterRevegetatioaReverse OsmosisReviewsReynolds NumberRheologyRheotropismRhizosphereRhodophytaRbyolitesRiceRiddanceRidgingRifflesRight-of-wayRigid FoundationsRigidityRill ErosionRillsRimeRip CurrentsRiparian LandRiparian RightsRiparian VegetationRiparian Water LossRiparian WatersRipple MarksRiprapRising StageRisksRiver Basin DevelopmentRiver BasinsRiver BedsRiver FlowRiver ForecastingRiver MechanicsRiver MouthRiver RegulationsRiver SystemsRiver TrainingRiver WashRiversRoachRoad ConstructionRoadbanksRoadsRock BoltsRock ExcavationRock FillRock GlaciersRock MechanicsRock PropertiesRock TestingRockflll DamsRocks

D-12

DESCRIPTORS Sludge Filters

RockslideaRodentiddesRodentsRolled-earth DamsRoller Gate*Rolling DamsRoot DevelopmentRoot DistributionRoot ZoneRooted Aquatic PlantsRootsRotary DrillingRotational FlowRotenoneRotifersRotorsRotten IceRoughness CoefficientRoutingRoyaltiesRubberRubidium RadioisotopesRuminantsRunning WatersRunoffRunoff CoefficientRunoff CycleRunoff ForecastingRunoff PlotRunoff RatesRunoff VolumeRupturingRural AreasRural SociologyRuthenium Radioisotopes

Safe YieldSafetySagebrushSago PondweedSagpondsSalamandersSaline LakesSaline SoilsSaline WaterSaline Water BarriersSaline Water IntrusionSaline Water SystemsSaline-freshwater InterfacesSalinitySalinity CurrentsSalmonSalmonellaSalt BalanceSalt FlatsSalt MarshesSalt PansSalt RejectionSalt ToleranceSaltationSaltsSalvage ValueSalvaged WaterSample Preparation

Sample PreservationSamplingSandSand AquifersSand BoilsSand FiltersSand WavesSandbarsSandpitsSandspitsSandstonesSanitary EngineeringSanitary LandfillsSanitary WattewaterSanitationSaprophytic BacteriaSatellite Technology ,Saturated FlowSaturated SoilsSaturationSaturation DeficitSaturation IndexSaturation ZoneSausage DamsSaw MillsSawdustScalingScenedesmusScenerySchedulingScientific PersonnelScourScreened WellsScreensScrew IceScuba DivingScnlpinScumSea BreezesSea GrassesSea IceSea LevelSea NettiesSeaWallsSealantsSealsSeashoresSeasonal DepletionSeasonal DistributionSeasonal StorageSeasonal VariationSeawaterSecchi DisksSecondary Oil RecoverySecondary ProductivitySecondary WastewaterSecondary Wastewater

TreatmentSediment ConcentrationSediment ControlSediment DischargeSediment DistributionSediment ErosionSediment GradingSediment LoadSediment SamplerSediment SortingSediment Transport

Sediment YieldSediment-carrying CapacitySediment-water InterfacesSedimentary BasinsSedimentary PetrologySedimentary RocksSedimentary StructuresSedimentationSedimentation BasinsSedimentation RatesSedintentologySedimentsSeed TreatmentSeedlingsSeedsSeep WaterSeepageSeepage ControlSeepage LinesSffpigf LossSeepage PitsSeepage SpringsSeepsSeichesSeismic PropertiesSeismic WavesSeismographsSeismologySelective MediaSelective WithdrawalSelectivitySelenastrumSeleniumSelf-purificationSemiarid ClimatesSemiarid LandsSemipermeable MembranesSensitivity AnalysisSensorsSeparated SewersSeparation TechniquesSeptic SludgeSeptic TanksSeptic WastewaterSerratiaSestonSettleable SolidsSettling BasinsSettling TanksSettling VelocitySewage BacteriaSewage DistrictsSewage GasSewage RateSewer DistrictsSewer GasSewer HydraulicsSewer InfiltrationSewer SeparationSewer SystemsSewerageSewersShadShale IceShalesShallow WaterShallow WellsShape

SharkShearShear DragShear StressShear TestsSheepSheet ErosionShellfishShellfish FanningShelterbdtsShigellaShinerShipsShoalsShock LffadtShore ProtectionShoreline CoverShoresShort-term PlanningShoulder DitchesShrimpShrubsSierozemsSieve AnalysisSievesSilageSilicaSilicatesSiliconSiltSilt FactorSilt LoadSiltingSilverSilver IodideSilvenideSimulated RainfallSimulationSimulation AnalysisSink DrainsSinksSinuous FlowSiphonsSite SelectionSitesSkimming

SlabsSleetSlide GatesSlimeSlope DegradationSlope GagesSlope ProtectionSlope StabilitySlope StabilizationSlopesSloping WavesSlotted FloorsSludgeSludge BankSludge BedSludge CakeSludge ConditioningSludge DigestionSludge DisposalSludge DryingSludge ExcessSludge Filters

D-13

Sludge Lagoons WATER RESOURCES THESAURUS

Sludge.LagoonsSludge SeedingSludge SolidsSludge ThickeningSludge UtilizationSludge Volume IndexSluice GatesSluicesSlurriesSlushSmall WatershedsSmeltSmoltSnail DarterSnailsSnowSnow AccumulationSnow CorniceSnow CoursesSnow CoverSnow DensitySnow DepthSnow ManagementSnow MantleSnow PillowsSnow RemovalSnow SamplersSnow SamplingSnow SkiingSnow StorageSnow SurreysSnow TrapsSnowdriftSnowlineSnowmeltSnowpackSoakingSoapsSocial AdjustmentSocial AspectsSocial ChangeSocial CostsSocial ImpactSocial NeedsSocial ParticipationSocial ValuesSodiumSodium ArseniteSodium ChlorideSodium CompoundsSodium HydroxideSodium SulfateSoftwoodSoil Absorption CapacitySoil AerationSoil AggregatesSoil AlgaeSoil AmendmentsSoil AnalysisSoil BacteriaSoil CementSoil ChemistrySoil ClassificationSoil ColumnsSoil CompactionSoil ConservationSoil ContaminationSoil Creep

Soil DensitySoil Density ProbesSoil DispersantsSoil Disposal FieldsSoil DynamicsSoil EngineeringSoil EnvironmentSoil ErosionSoil FiltersSoil FungiSoil GasesSoil GenesisSoil HorizonsSoil Management 'Soil MechanicsSoil Moisture DeficiencySoil Moisture MetersSoil Moisture RetentionSoil Organic MatterSoil Physical PropertiesSoil PhysicsSoil PorositySoil PressureSoil ProfilesSoil PropertiesSoil SaturationSoil ScienceSoil SealantsSoil SolutionSoil StabilitySoil StabilizationSoil StrengthSoil StructureSoil SurfacesSoil SurveysSoil TemperatureSoil TestsSoil TextureSoil TreatmentSoil TypesSoil WaterSoil Water PotentialSoil Water SuctionSoil Water TableSoil-water-plant RelationshipsSolar DistillationSolar EnergySolar RadiationSolar StillsSolid Waste DisposalSolid WastesSolidsSolids Contact ProcessesSolifluctionSolitary WavesSolubilitySolubility CoefficientSolute TransportSolutesSolventsSonarSorghumSorptionSound WavesSoundingSoundsSovereign ImmunitySoybeans

SpartinaiSpatial DistributionSpawningSpedationSpecies CompositionSpecies DiversitySpecific CapacitySpecific ConductivitySpecific GravitySpecific HeadSpecific HeatSpecific HumiditySpecific RetentionSpecific YieldSpecificationsSpectral AnalysisSpectrometersSpectrophotometrySpectroscopySphaerotilusSpillway CapacitySpillway CrestsSpillway GatesSpillway TroughSpillwaysSpirogyraSpoil BanksSpoil DisposalSporesSport FishingSpray IrrigationSprayingSprays Spring TidesSpring WaterSpringsSprinkler IrrigationSprinklersSprinklingSpruce TreesSpur DikesSpursSquallsStability AnalysisStabilization LagoonsStabilization PondsStable ChannelsStable IsotopesStage DigestionStage TreatmentStage-discharge RelationsStagesStagnant WaterStandard DeviationStandard Project FloodStandardsStanding CropsStanding WatersStanding WavesStandpipesStanford Watershed ModelStaphylococcusStarchState JurisdictionStatic HeadStationary ProcessStatistical AnalysisStatistical Methods

Statistical ModelsStatisticsSteady FlowSteamSteam TurbinesStedSteel IndustryStemflowSteppesSterilantsSterilizationSticklebackStilling BasinsStilling WellsStochastic HydrologyStochastic ProcessStokes LawStomataStomatal TranspirationStonefliesStorageStorage CapacityStorage CoefficientStorage EquationStorage GalleryStorage RatioStorage RequirementsStorage ReservoirsStorage TanksStorm DrainsStorm RunoffStorm SeepageStorm SewersStorm SurgesStorm TidesStorm WastewaterStorm WaterStorm-overflow SewersStormsStrainStrain GagesStrain MeasurementStraitsStratificationStratified FlowStratigraphyStrawStream BanksStream BiotaStream ClassificationStream DegradationStream DischargeStream ErosionStream FisheriesStream GagesStream GradientStream ImprovementStream OrderStream PollutionStream ProfilesStream StabilizationStream UpflowStreambedsStreamflowStreamflow DepletionStreamflow ForecastingStreamsStreeter-Phelps Equation

D-14

DESCRIPTORS Trenches

StrengthStreptococcusStressStress AnalysisStress-strain CurvesStrip CroppingStrip Mine LakesStrip Mine WastesStrip MinesStrontiumStrontium RadioisotopesStructural BeamsStructural BehaviorStructural EngineeringStructural GeologyStructural ModelsStructural SettlementStructural WaterStructureSturgeonSubarctic ZoneSubartesian WellsSubhumid ClimatesSublethal EffectsSublimationSubmarine CanyonsSubmarine SpringsSubmarinesSubmerged BedsSubmerged LandsSubmerged PlantsSubmergenceSubsidenceSubsidiesSubsoilSubsoil DrainageSubsoil DrainsSubstratesSubsurface DrainageSubsurface DrainsSubsurface FiltersSubsurface IrrigationSubsurface MappingSubsurface WaterSubterranean StreamsSubtropic ZoneSuburban AreasSuccessionSuckerSudangrassSugar BeetsSugar CropsSugarcaneSugarsSulfatesSulfidesSulflte LiquorsSulfite MillsSulfonatesSulfurSulfur Bacteria 'Sulfur CompoundsSulfur CycleSulfuric AcidSumpsSunfishSupercoolingSupersaturation

Supervisory ControlSupplemental IrrigationSurfSurface DetentionSurface DrainageSurface FlowSurface IrrigationSurface RunoffSurface SealingSurface TensionSurface VelocitySurface WaterSurface Water AvailabilitySurface Water RecordsSurface-groundwater

Relations Surfactants Surfboarding Surge Tanks SurgesSurveying Instruments Surveys Survival Suspended Load Suspended Sediments Suspended Solids Suspension Swamps SwansSweet Potatoes Swimming Swimming Pools Switching Surges Symbiosis Symposium Synergistic Effects Synoptic Analysis SynthesisSynthetic Hydrology Systematics Systems Analysis Systems Engineering

TaggingTailraceTailwaterTalusTalus SpringsTamariskTannery WastesTanninsTariffTasteTaste-producing AlgaeTax RatesTaxesTaxonomyTechnical SocietiesTechnical WritingTechnologyTechnology TransferTectonicsTelemetryTemperate Zone

Temperature Temperature Control Temperature Effects Temperature Gradient Temporal Distribution Tensile Stress Tensiometers TensionTerrace Channels Terrace Springs Terracing Terrain Analysis Territorial Waters Tertiary Wastewater

Treatment Test Facilities Test Holes Test Wells Testing Procedures Tetrapropylene-benzene

SulfonateTextile Mill Wastes Textiles Thalweg Thaw Thawing Theis Equation Theoretical Analysis Thermal Capacity Thermal Conductivity Thermal Expansion Thermal Pollution Thermal Power Thermal Powerplants Thermal Properties Thermal Radiation Thermal Springs Thermal Stratification Thermal Stress Thermal Water Thermo-osmosis Thermocline Thermocouples Thermodynamics Thermometers Thermophilic Bacteria Thesauri Thiems Equation Thin FilmsThin Layer Chromatography ThiobacillusThiocarbamate Pesticides Thorium Throughfall Thunderstorms Tidal Amplitude Tidal Basins Tidal Bores Tidal Currents Tidal Effects Tidal Efficiency Tidal Energy Tidal Flats Tidal Floods Tidal Hydraulics Tidal Marshes Tidal Powerplants Tidal Prism

Tidal RangeTidal RiversTidal WavesTide LandsTidesTidewaterTilapiaTile DrainageTile DrainsTilesTilting DamsTime Series AnalysisTimingTinTissue AnalysisTitaniumToadsTobaccoToleranceTomatoesTopographic MappingTopographyTopologyTopsoilTornadoesTortsTourismToxicityToxinsTrace ElementsTrace LevelsTrace MetalsTracersTracking TechniquesTractionTractive ForcesTrade AssociationsTrafficabilityTrainingTranquil FlowTransition FlowTransition ZoneTranslationsTranslatory WavesTranslocationTransmission ConstantTransmission LinesTransmission TowersTransmissivityTransparencyTranspirationTranspiration ControlTranspiration RatioTransport DepletionTransportationTransverse DrainageTrap EfficiencyTrappingTrash RacksTravelTraveltimeTravertineTrawlingTreated WaterTreatiesTreesTrematodesTrenches

D-15

Trespass WATER RESOURCES THESAURUS

TrespassTriazine PesticidesTributariesTrickle IrrigationTrickling FiltersTriptonTritiumTrophic LevelTropic ZoneTropical CyclonesTropical RegionsTropismsTroutTsunamisTubesTubificidsTunaTundraTungstenTunnel ConstructionTunnel FailureTunnel HydraulicsTunnel LiningsTunnelingTunnelsTurbidityTurbidity CurrentsTurbidity FlowTurbinesTurbulent FlowTurfTurf GrassesTurgidityTurnover TimeTurtlesTyphoons

UUltraflltratioaUltrasonicsUltraviolet RadiationUnconfined AquifersUnconsolidated AquifersUnderflowUnderground PowerplantsUnderground StorageUnderground StreamsUnderground StructuresUnderground Waste DisposalUnderwaterUnemploymentUniform FlowUniformity CoefficientUnit HydrographsUnited NationsUnsaturated FlowUnstable ChannelsUnsteady FlowUpconingUplift PressureUpstreamUpwellingUraniumUranium RadioisotopesUrban Areas

Urban DrainageUrban HydrologyUrban PlanningUrban RenewalUrban RunoffUrban SociologyUrban WatershedsUrbanizationUrea PesticidesUreasUrineUseful StorageUser ChargesUsufructuary RightUtilitiesUtility Extension

Vacuum DryingVacuum FiltersVacuum FiltrationVadose WaterValley SpringsValley StorageValleysValueVanadiumVapor Compression

Distillation Vapor Pressure Vaporization Variability Variation Coefficient Varied Flow Varieties Vascular Tissues Vegetable Crops Vegetation Vegetation Effects Vegetation Establishment Vegetation Regrowth VelocityVelocity Coefficient Velocity Curve Velocity Distribution Velocity Head Velocity of Approach Velocity Potential Ventilation Ventnri Meters Vertical Distribution Vertical Flow Verticillium Vetch Vibrations Vibrio Vigil Basins Vine Crops Viricides Viruses Viscometers ViscosityViscosity Coefficient Viscous Flow Vitamins

Void Ratio Void Space Volatile Acids Volatile Solids Volatility Volcanic Springs VolcanoesVolumetric Analysis Vortices

WWadiWagesWarburg RespirometryWarm SpringsWarning StageWarning SystemsWash LoadWash WaterWashoutsWaste CharacteristicsWaste DisposalWaste DumpsWaste HeatWaste IdentificationWaste LoadWaste ManagementWaste PaperWaste RecoveryWaste StorageWaste TreatmentWaste-assimilative CapacityWastesWastewaterWastewater AnalysisWastewater CollectionWastewater CompositionWastewater DilutionWastewater DisposalWastewater FacilitiesWastewater FarmingWastewater IrrigationWastewater LagoonsWastewater ManagementWastewater OutfallWastewater OxidationWastewater PollutionWastewater RenovationWastewater TreatmentWaterWater AllocationWater AnalysisWater BeetlesWater BirdsWater BleedingWater BoundaryWater CirculationWater ConditioningWater ConservationWater ConsumptionWater ControlWater ConveyanceWater CoolingWater CostsWater Currents

Water Deficit Water Delivery Water Demand Water Depth Water Distribution Water Districts Water Exchange Water Harvesting Water Holes Water Hyacinth Water Importing Water Injury Water Law Water LevelWater Level Fluctuations Water Level Recorders Water Loss Water Mains Water Management Water Measurement Water Metering Water Permits Water Phone Water Plane Water Policy Water Pollution Water Pollution Control Water Pollution Effects Water Pollution Prevention Water Pollution Sources Water Pollution Treatment Water Potentials Water Pressure Water Properties Water Quality Water Quality Control Water Quality Management Water Quality Standards Water Rates Water Repellent Soils Water Requirements Water Resources

DevelopmentWater Resources Institutes Water Reuse Water Rights Water Sampling Water Scarcity Water Shortage Water Softening Water Spreading Water Storage Water Stress Water SupplyWater Supply Development Water Supply Systems Water Surface Profiles Water Table Water Table Decline Water Table Fluctuations Water Table Gradient Water Table Profiles Water Table Rise Water Table Wells Water Tanks Water Temperature Water Transfer Water Transport

D-16

Water Treatment Water Treatment Facilities Water Use Water Use Efficiency Water Users Water Vapor Water Wheels Water YieldWater Yield Improvement Water Zoning Water-carrying Capacity Watercourses Waterfalls Waterfleas Waterfowl Waterlogging Waterproofing Watershed Management Watersheds Waterways Wave Action Wave Crest Wave Direction Wave Height Wave Pile-up Wave Propagation Wave Refraction Wave Runup Wave Velocity Wave Wash Wavelengths Waves Weather

. Weather Data Collections Weather Forecasting Weather Modification Weather Patterns Weathering Weathering Zone Weber Number Weed Control Weeds Weight WeirsWell Capacity Well Casings Well Data Well Filters Well Flooding Well Function Well Hole Well Hydraulics Well Hydrographs Well Intake Well Logs Well Permits Well Regulations Well Screens Well Seepage Well Shooting Well Water Well Yield Wellpoints WellsWet Climates Wet Oxidation Process Wetlands Wettabllity

WettingWhalesWheatWheatgrassesWhite WaterWhiteflshWild RivenWilderness AreasWildlifeWildlife ConservationWildlife HabitatsWildlife ManagementWillow TreesWiltingWilting PointWindWind ErosionWind GagesWind GapWind PressureWind TidesWind VelocityWind WavesWind-driven CurrentsWindbreaksWinkler MethodWithdrawalWood WastesWoolWool GreaseWool Scouring

X-ray Diffraction X-ray Fluorescence X-ray Spectroscopy X-raysXerophytes

YeastsYieldYield EquationsYoung RiversYoungs ModulusYttrium Radioisotopes

Zeolite ProcessZeolitesZero DischargeZero Moisture IndexZeta PotentialZincZinc RadioisotopesZirconiumZonesZoningZoogloea

Zooplankton

D-17

D.S. QOVERHMENT PRINTINO OFFICE: 1992 - 312-240 - 226/60014