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FreeGovernmentUnited States
NHDPlus High Resolution
National hydrography framework with stream networks and catchments
usgs.gov
At a glance
- Region
- United States
- Coverage
- 27 million flowline features
- Access
- Free
- Category
- Government
- Last updated
- 2025
What's inside
- Stream Networks
- Flowlines
- Catchments
- Flow Direction
- River Geometry
Terms explained
What you can do with it
Typical work that data of this type supports.
- 01
Design flows
Estimate 1-in-50 and 1-in-100 year floods for bridges, culverts and spillways.
Because it has: Catchments
- 02
Low flows
Set environmental flows and check what is left in the river in a dry year.
- 03
Coverage gaps
Find who lacks safe water or sanitation.
Because it has: Stream Networks
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Flow forecasting
Train LSTM-style models on past records to forecast river levels and flow days ahead.
- 02
Ungauged basins
Combine with catchment data to estimate flow where there is no gauge.
- 03
Failure prediction
Predict pipe bursts and plant failures before they happen.
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