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 aaccessible 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
An NHD editor should complete this form for each editing job.
Draft Memorandum of Understanding for NHD Stewardship in California
This will be a template for agreements with organizations that want to become NHD editors.
Status Map of Level 08 Hydrologic Units