11

The National Hydrography The National Hydrography Dataset Dataset PlusPlus

What is NHDPlus?What is NHDPlus?

22

How will this vision be attained?

Vision for aVision for aNational Geospatial Surface Water National Geospatial Surface Water

FrameworkFramework

National Elevation Dataset (NED)

National Hydrography

Dataset (NHD)

Watershed Boundary Dataset (WBD)

33

The TeamThe Team

EPA Project LeadTommy Dewald

Horizon Systems

Cindy McKay

Jen Hill

Bob Deffenbaugh

USGS WRD

Al Rea

Rich Moore

Craig Johnston

Modeling Consultant

Tim Bondelid

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NHD PlusNHD PlusAn integrated suite of application-ready An integrated suite of application-ready geospatial surface water data products. geospatial surface water data products.

It’s the first national effort to integrate:It’s the first national effort to integrate:

National Hydrography Dataset (NHD)National Hydrography Dataset (NHD) National Elevation Dataset (NED)National Elevation Dataset (NED) National Watershed Boundary Dataset (WBD) National Watershed Boundary Dataset (WBD) National Land Cover Dataset (NLCD)National Land Cover Dataset (NLCD)

NHDPlus links the mapped stream network

to the landscape.

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NHD Plus – What’s Inside?NHD Plus – What’s Inside?NHDNHD Greatly improved 1:100K National Hydrography DatasetGreatly improved 1:100K National Hydrography Dataset

PLUS (9 more components):PLUS (9 more components): Value Added AttributesValue Added Attributes Elevation-based CatchmentsElevation-based Catchments Catchment CharacteristicsCatchment Characteristics Headwater Node AreasHeadwater Node Areas Cumulative Drainage Area CharacteristicsCumulative Drainage Area Characteristics Flow Direction, Flow Accumulation, and Elevation GridsFlow Direction, Flow Accumulation, and Elevation Grids Min/Max Elevations and SlopesMin/Max Elevations and Slopes Flow Volume & Velocity EstimatesFlow Volume & Velocity Estimates Flow Gages with Network LocationsFlow Gages with Network Locations

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A Framework dataset that includes:A Framework dataset that includes:

• Hydrographic features for making mapsHydrographic features for making maps• A national stream addressing systemA national stream addressing system• A modeling network for navigating A modeling network for navigating

upstream/downstreamupstream/downstream• A maintenance infrastructureA maintenance infrastructure• User updatesUser updates• Distributed formats – personal geodatabase, Distributed formats – personal geodatabase,

shapefiles, coveragesshapefiles, coverages• Compatible with ArcHydro Model & ToolsCompatible with ArcHydro Model & Tools

What is theWhat is the National Hydrography Dataset (NHD)? National Hydrography Dataset (NHD)?

3

12

Impairm

ent

DrinkingWaterIntake

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Value-Added AttributesValue-Added Attributes

A set of two dozen network A set of two dozen network characteristicscharacteristics

Derived from native NHD contentDerived from native NHD content For Analysis, Navigation & DisplayFor Analysis, Navigation & Display

(Stream Order, Stream Level, Waterbody-Network link and more…)

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Elevation Grid (elev_cm)Elevation Grid (elev_cm)National Elevation Data (NED) used to create the NHDPlusNational Elevation Data (NED) used to create the NHDPlus

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Hydrologically-Conditioned ElevationHydrologically-Conditioned Elevation

NationalHydrographyDataset (NHD)

Watershed BoundaryDataset (WBD)

National ElevationDataset (NED)

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Flow Direction Grid (FDR)Flow Direction Grid (FDR)

Cells point down hill Cells point down hill to the neighboring cellto the neighboring cellwith the lowest elevationwith the lowest elevation

Flow Accumulation Grid (FAC)Flow Accumulation Grid (FAC)

Cells contains the count Cells contains the count of the number of cells that of the number of cells that are uphillare uphill

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1111

Catchment Grid & ShapefileCatchment Grid & ShapefileThe portion of the land surface that drains to a network flowlineThe portion of the land surface that drains to a network flowline

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Catchment AttributesCatchment Attributes

Mean Annual Temperature (Prism - 4km)

Mean Annual Precipitation (Prism - 4km)

% of each of the 21 land use classifications from the 1992 National Land Cover Dataset (NLCD)

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Flowline AttributesFlowline Attributes

Raw min/max elevationsRaw min/max elevations Smoothed min/max elevationsSmoothed min/max elevations SlopeSlope Cumulative drainage areaCumulative drainage area Cumulative land use classificationsCumulative land use classifications Flow volume, incremental inflow – Unit Flow volume, incremental inflow – Unit

Runoff MethodRunoff Method Flow volume – Vogel MethodFlow volume – Vogel Method Velocity – JobsenVelocity – Jobsen

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USGS Gage Point Events on USGS Gage Point Events on NHDPlus – Coming Soon!NHDPlus – Coming Soon!

Many Attributes:Gage IDReachcode/MeasureLat/LongAgencyStation NameSeveral Dozen Flow StatsAnd more…

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62 units total

Distribution Units for Elevation, Distribution Units for Elevation, FAC, and FDR GridsFAC, and FDR Grids

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16

15

141312 1817090301 02 04

10

05

06

0711

08

20

NHDPlus Distribution Units for NHD, Catchments, NHDPlus Distribution Units for NHD, Catchments, and Attribute Tablesand Attribute Tables

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171710U10U

0505

0606

0707

11110808

1515

1414

0303

0202

0101

04041616

1212

1313

0909

031803182020

2020

0318

10L10L

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Linking Data to the NHDPlusLinking Data to the NHDPlus

Area Links

Waterbody Reach: 06030102002785 + shape

Linear Links

Linear Reach: 05030204004722From Measure: 15.0

To Measure: 90.00

Linear Reach: 02020005000375Measure: 48.247Po

int L

inks

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Things Linked to NHDPlusThings Linked to NHDPlus EPA Water ProgramsEPA Water Programs

• Water Quality StandardsWater Quality Standards• Water Quality Monitoring StationsWater Quality Monitoring Stations• Assessed WatersAssessed Waters• Impaired Waters Impaired Waters • Nonpoint Source ProjectsNonpoint Source Projects• BeachesBeaches• Fish Consumption AdvisoriesFish Consumption Advisories• Sewage No Discharge ZonesSewage No Discharge Zones• Permitted DischargersPermitted Dischargers• Drinking Water IntakesDrinking Water Intakes• Drinking Water WellsDrinking Water Wells• Clean Watershed NeedsClean Watershed Needs• Special Appropriations ProjectsSpecial Appropriations Projects• And More…And More…

USGS Flow GagesUSGS Flow Gages

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2020

2121

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A Quick Example of Analysis A Quick Example of Analysis Using NHDPlusUsing NHDPlus

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STEP 1

2424

STEP 2

2525

STEP 3

2626

STEP 4

2727

STEP 5

2828

STEP 6

2929

STEP 7

3030

Value Value Added Added

AttributesAttributes

TemperatureTemperature&&

PrecipitationPrecipitation

Land Land UseUse

Flow Flow Volume Volume

& & VelocityVelocity

STEP 8

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Watershed CharacterizationWatershed Characterization

Main Stem: Huntsville Spring BranchStream Order: 3Stream Level: 4

Area weighted precipitation 1431.2 mmArea weighted temperature 15.3 oC

Land UseOpen Water 1%Residential 28%Commercial/Ind/Trans 9%Barren 1%Forest 33%Pasture/Hay 5%Row Crops 12%Urban/Rec Grasses 5%Wetlands 5%Other 1%

Drainage area 180.5 km2

Mean Annual Flow (UROM) 128.6 cfsMean Annual Flow (Vogel) 123.7 cfs

Mean Annual Velocity (UROM) 0.95 fpsMean Annual Velocity (Vogel) 0.87 fps

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Importance of the NHDPlusImportance of the NHDPlus

The NHDPlus Is a Complete Analytical The NHDPlus Is a Complete Analytical ToolTool Very Robust Stream NetworkVery Robust Stream Network New Attributes for Improved ApplicationsNew Attributes for Improved Applications

Catchments, FDR, FAC and Elevation Add Catchments, FDR, FAC and Elevation Add the Landscape into the Analytic the Landscape into the Analytic EnvironmentEnvironment Watershed Delineation and CharacterizationWatershed Delineation and Characterization Integration with virtually any landscape Integration with virtually any landscape

datasetdataset Models!!!!Models!!!!

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NHDPlus – What’s Available?NHDPlus – What’s Available? Data: Data:

Great Lakes (04)Great Lakes (04) Mississippi (05, 06, 07, 08, 10, 11 and 0318)Mississippi (05, 06, 07, 08, 10, 11 and 0318) Texas (12)Texas (12) Rio Grande (13)Rio Grande (13) Colorado (14 and 15)Colorado (14 and 15) Great Basin (16)Great Basin (16) Pacific Northwest (17)Pacific Northwest (17) California (18)California (18) New England (01)New England (01) Mid-Atlantic (02)Mid-Atlantic (02) By End of September – South Atlantic (03), Souris-Red-Rainy (09)By End of September – South Atlantic (03), Souris-Red-Rainy (09)

Documentation:Documentation: User GuideUser Guide Various PresentationsVarious Presentations MetadataMetadata Release Notes for each hydro regionRelease Notes for each hydro region

Training:Training: Eight Exercises/TutorialsEight Exercises/Tutorials

Tools:Tools: NHD Flow Table NavigatorNHD Flow Table Navigator NHDPlus VAA NavigatorNHDPlus VAA Navigator

#0 – Preparation#0 – Preparation#1 – Setting Up The Data#1 – Setting Up The Data#2 – Linking Data to NHD#2 – Linking Data to NHD#3 – Navigating with Geometry#3 – Navigating with Geometry#4 – Navigating with VAAs & Flow Table#4 – Navigating with VAAs & Flow Table#5 – Network Analysis#5 – Network Analysis#6 – Raster Dataset#6 – Raster Dataset#7 – Watershed Delineation#7 – Watershed Delineation#8 – Simple Model#8 – Simple Model

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Where to get NHDPlus Data, Where to get NHDPlus Data, Documentation, Presentations, Documentation, Presentations,

Exercises and ToolsExercises and Tools

Web Site: http://www.epa.gov/waters Click on “NHDPlus”

Web Site: http://www.horizon-systems.com/nhdplus

FTP Site: ftp://ftp.horizon-systems.com/nhdplus

Fall 2006: In the EPA Waters Database

Email: NHDPlus@HSCNET.COM