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California groundwater basins, subbasins, and hydrologic regions. The California Department of Water Resources recognizes 10 hydrologic regions and three additional drainage areas within the U.S. state of California. The hydrologic regions are further subdivided into 515 groundwater basins.
Map of water storage and delivery facilities as well as major rivers and cities in the state of California. Central Valley Project systems are in red, and State Water Project in blue. California's interconnected water system serves almost 40 million people and irrigates over 5,680,000 acres (2,300,000 ha) of farmland. [1]
The largest single reservoir in California is Shasta Lake, with a full volume of more than 4,552,000 acre-feet (5.615 km 3 ). Map all coordinates using OpenStreetMap. Key. † denotes reservoir not entirely in California. ‡ denotes reservoir that is offstream or receives most of its water from a source not associated with its feeder stream (s).
Principal aquifers of California. California aquifers, excerpted from map in Ground Water Atlas of the United States (USGS, 2000): Lavender is "other" for "rocks that generally yield less than 10 gal/min to wells"; dark green-blue (3) are the California coastal basin aquifers, bright-turquoise blue (7) is the Central Valley aquifer system, flat ...
California region, with its 10 4-digit subregion hydrologic unit boundaries. The California water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey in the United States hydrologic unit system, which is used to divide and sub-divide the United States into successively smaller hydrologic units.
Geography of California. Coordinates: 37°9′58″N 119°26′58″W. Map of California topography and geomorphic provinces. California's major mountain ranges. California is a U.S. state on the western coast of North America. Covering an area of 163,696 sq mi (423,970 km 2 ), California is among the most geographically diverse states.
Map of the Tulare Lake Basin. Usually an endorheic basin, waters in this region all eventually would reach Tulare Lake. This region would overflow into the San Joaquin River during flood years when Tulare Lake overflowed. Streams are listed clockwise around the Tulare Basin, starting at the Kings River: Kings River (jump to tributaries) Sand Creek
Previous research has shown that not only are many California rivers overallocated, but existing water rights far exceed the average supply of many rivers. Inadequate data collection adds to these ...