David Nail USGS Geospatial Liaison to Indiana March 13 th, 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. pubs.usgs.gov/sir/2006/5217/pdf/SIR _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

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.

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.

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.

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.

Web-based Reach Indexing Tool (WebRIT)  Assisting users in georeferencing their environmental program data to the NHD. Examples of NHD Applications in the Nation

NHDPlus – Medium resolution, 1:100K scale Examples of NHD Applications in the Nation

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

StreamStats –

NHD Stewardship conference – Denver, CO. April 24 – 26, 2007 ftp://nhdftp.usgs.gov/Stewardship/Stewardship_Agenda.doc