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The National Hydrologic Dataset. Brian Brodeur GIS Program Director Mass DEP 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

The National Hydrologic Dataset

Brian Brodeur

GIS Program Director

Mass DEP

nhd national hydrologic dataset

NHDNational Hydrologic Dataset

Backed by the USGS

Crosses State Borders

What’s not to like?

current version of the nhd
Current Version of the NHD

Relational Geodatabase

Looks pretty


doesn’t it?

National Hydrography





Feature Dataset

Feature Dataset

Attribution, Related Tables, Coded Domains

Additional Data

it would be nice if
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.
  • NHD provides a stable network for attributing as Events

Water Quality Standards

Attributes stored as events

Fish Habitat

CWA Assessment

NHD, Shared Base Hydro

nhd is a network
NHD is a Network
  • You can accumulate water withdrawals, and Discharges, route spills, do hydrologic modeling…..
why do we need stewardship
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.
mass dep the steward for nhd in massachusetts
Mass DEP The Steward for NHD In Massachusetts
  • Perform edits consistent with the National Standards
  • Coordinate input {Corrections} from other users
management advisory committee
ManagementAdvisory Committee

Who Runs NHD in MA

  • Looking for volunteers!

TechnicalAdvisory Committee

the national hydrologic dataset1

The National Hydrologic Dataset

Brian Brodeur

GIS Program Director

Mass DEP