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National Hydography Stewardship in California

The National Hydrography Dataset (NHD) and Watershed Boundary Dataset (WBD) are used to portray surface water on The National Map. The NHD represents the drainage network with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and stream gages. The WBD represents drainage basins in eight different coincident sizes.

DWR is the steward for NHD and WBD in California. We work with other organizations to edit and improve NHD and WBD, using the business rules for California. This is a process that takes time with a State as large and diverse as California. All our improvements are sent to USGS, and accessible from their website.

For NHD Editors

These rules are to be used by all NHD Editors.
Last updated: September 29, 2016

This is a list of data sources being used to improve NHD.
If you have additional sources, especially high resolution local data, let us know.
Last updated: October 11, 2016

Draft MOU
Draft Memorandum of Understanding for NHD Stewardship in California
This will be a template for agreements with organizations that want to become NHD editors.

Final Letter to California Watershed Boundaries Dataset MOU Signatories
What would have been the next version of the California Watershed Boundaries Dataset (CalWater) will be the Watershed Boundaries Dataset.

NHD Plus
NHD Plus Training Videos
A set of fourteen NHD Plus videos from July 2016.