Data Basin is a science-based mapping and analysis platform that supports learning, research, and sustainable environmental stewardship.
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This dataset depicts watersheds that cross the boundaries of San Diego,
Imperial, Orange and Riverside Counties as well as Northern Baja California.
Notes: The watersheds north of the USA-Mexico border correspond to the
hydrologic units of the hydrologic basins layer originally created by
Tierra Data Systems for the California Department of Forestry. The
Tijuana River Watershed south of the international border was created by
the Geography Department of San Diego State University (SDSU) based on
manually digitized contour lines from 1:50,000-scale INEGI maps. The
remaining watersheds south of the international border were created by
SDSU based on 1 kilometer DEMs.
Layers in this dataset are based on combinations of the following options.
You may choose from these options to select a specific layer on the map page.