Basin & Watersheds

Groundwater Basins and Watersheds

A groundwater basin is defined as an area underlain by permeable materials capable of furnishing a significant supply of groundwater to wells or storing a significant amount of water. A groundwater basin is three-dimensional and includes both the surface extent and all of the subsurface freshwater yielding material. For more information on groundwater basins and subbasins, please visit the California Department of Water Resources Bulletin 118 website.

A watershed is a land’s surface area that contributes to the drainage or catchment area above a specific point on a stream or river. For more information on CalWater 2.2.1 watersheds, please visit California’s Department of Conservation Watershed Program website.

Geospatial files of this data are available for download from the Mojave Water Agency’s Geospatial Library.