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Update on National Hydrography Data. David Nail USGS Geospatial Liaison to Indiana March 13 th , 2007. Outline of Presentation. Overview of NHD What’s New with NHD High Resolution status for U.S.A. High Resolution status for Indiana Examples of NHD applications/usage around the country. - PowerPoint PPT Presentation
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David Nail
USGS Geospatial Liaison to Indiana
March 13th, 2007
Update on National Hydrography Data
Outline of Presentation
Overview of NHD
What’s New with NHD
High Resolution status for U.S.A.
High Resolution status for Indiana
Examples of NHD applications/usage around the country
Overview of NHD
A Framework dataset that includes:
Hydrographic features for making maps
A national stream addressing system
A modeling network for navigating upstream/downstream
A maintenance infrastructure
Overview of NHD continued
A Framework dataset that includes:
User updates
Distributed formats – personal geodatabase, shapefiles, coverages
Compatible with ArcHydro Model & Tools
Overview of NHD continued
Medium Resolution, 1:100K scale
High Resolution, 1:24K scale or better
Local Resolution, limited availability, from 1:5K source
What’s New with NHD
New Features
New Event Tables
New NHD Features Underground Conduit – represents underground streams/drains particularly for karst and volcanic geomorphology.
Ephemeral Streams
Intermittent/Perennial Swamp/Marsh
Stormwater – drainage in urban areas.
Levees
Point
Line
Area
New Event Tables
High Resolution status for U.S.A.
High Resolution status for Indiana
Examples of NHD Applications in the Nation
Vermont – Created a regression equation for estimating Intermittent streams.
http://pubs.usgs.gov/sir/2006/5217/pdf/SIR2006-5217_report.pdf
Examples of NHD Applications in the Nation
Vermont – Value Added Attributes for the Vermont Hydrography Dataset.
The VAAs are designed to enhance the capabilities of NHD in three areas:
1) Navigation/Traversal;
2) Analysis;
3) Display http://www.vcgi.org/about_vcgi/?page=./projects/vaa/default_content.cfm
Examples of NHD Applications in the Nation
Florida – using the NHD as the framework dataset to contain official names, ReachCode designations, basins, geometric network, assessment units and monitoring site locations in support of Watershed management and TMDL development.
http://www.dep.state.fl.us/water/wqssp/nutrients/docs/TAC/tac11_RiversStreamsCriteriaUpdate.pdf
Examples of NHD Applications in the Nation
Minnesota – Pollution Control Agency
Assessment reaches (Impaired Waters, 305b and 303d) will be indexed to the National Hydrographic Data.
http://www.pca.state.mn.us/publications/manuals/tmdl-guidancemanual04.pdf
http://www.pca.state.mn.us/water/tmdl/index.html
Examples of NHD Applications in the Nation
New York – Department of Environmental Conservation
Use NHD to track & report EPA 305b/303d water quality requirements.
NHD provides the underlying geospatial reference for project development and management within the floodplain
mapping program.
http://www.dec.state.ny.us/website/dow/wgit/fpm/index.html
Examples of NHD Applications in the Nation
North Carolina – Stream Mapping Working Group
Creation of a new statewide digital surface waters layer – core design based on the NHD, at 1:5K scale.
Database design is responsive to data sharing, data maintenance and
application development.
http://pmu.dot.state.nc.us/download/about/board/eppc/presentations/2007/StreamMappingUpdate.pdf
Web-based Reach Indexing Tool (WebRIT)
Assisting users in georeferencing their environmental program data to the NHD.
http://www.epa.gov/waters/webrit
http://www.epa.gov/waters/webrit/downloads/WebRIT_Factsheet.pdf
Examples of NHD Applications in the Nation
NHDPlus – Medium resolution, 1:100K scale
Examples of NHD Applications in the Nation
http://www.horizon-systems.com/nhdplus/data/NHDPLUS_UserGuide.pdf
http://www.horizon-systems.com/nhdplus/
NHDPlus
An integrated suite of application-ready geospatial surface water data products.
It’s the first national effort to integrate:
National Hydrography Dataset (NHD)
National Elevation Dataset (NED)
National Watershed Boundary Dataset (WBD)
National Land Cover Dataset (NLCD)
Examples of NHD Applications in the Nation
NHDPlus - Greatly improved 1:100K National Hydrography Dataset
PLUS (8 more components): Value Added Attributes Elevation-based Catchments Catchment Characteristics Headwater Node Areas Cumulative Drainage Area Characteristics Flow Direction, Flow Accumulation, and Elevation Grids Min/Max Elevations and Slopes Flow Volume & Velocity Estimates
Examples of NHD Applications in the Nation
Examples of NHD Applications in the Nation
StreamStats –
http://water.usgs.gov/osw/streamstats/ssonline.html
NHD Stewardship conference – Denver, CO.
April 24 – 26, 2007
ftp://nhdftp.usgs.gov/Stewardship/Stewardship_Agenda.doc