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The National Hydrologic Dataset

The National Hydrologic Dataset. Brian Brodeur GIS Program Director Mass DEP Brian.Brodeur@state.ma.us. NHD National Hydrologic Dataset. Backed by the USGS Crosses State Borders What’s not to like?. Current Version of the NHD. Relational Geodatabase. Looks pretty innocent doesn’t it?.

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The National Hydrologic Dataset

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  1. The National Hydrologic Dataset Brian Brodeur GIS Program Director Mass DEP Brian.Brodeur@state.ma.us

  2. NHDNational Hydrologic Dataset Backed by the USGS Crosses State Borders What’s not to like?

  3. Current Version of the NHD Relational Geodatabase Looks pretty innocent doesn’t it? National Hydrography Dataset Watershed Boundary Dataset Feature Dataset Feature Dataset Attribution, Related Tables, Coded Domains Additional Data

  4. NHD Geodatabase Model – Version 2.0

  5. If It Is That Complicated, Why Bother?

  6. A Single, Common, Base Hydrography

  7. It Would Be Nice IF: • All the waters we are charge to protect are on the national map. • We could report to the EPA by reference to the national map • If our science could cross state borders without paying a toll.

  8. EVENTS !!! • NHD provides a stable network for attributing as Events Water Quality Standards Attributes stored as events Fish Habitat CWA Assessment NHD, Shared Base Hydro

  9. NHD is a Network • You can accumulate water withdrawals, and Discharges, route spills, do hydrologic modeling…..

  10. We need a Steward!

  11. Why Do We Need Stewardship? • The USGS does not know everything. • Hydrography changes • State and local organizations are better aware of the hydrography and capable of ground truth validation within their region. Such local and regional organizations should have the opportunity to serve as stewards.

  12. Mass DEP The Steward for NHD In Massachusetts • Perform edits consistent with the National Standards • Coordinate input {Corrections} from other users

  13. ManagementAdvisory Committee Who Runs NHD in MA • Looking for volunteers! TechnicalAdvisory Committee

  14. The National Hydrologic Dataset Brian Brodeur GIS Program Director Mass DEP Brian.Brodeur@state.ma.us

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