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The California Water Documents collection is currently a work in progress at the Claremont Colleges Digital Library. The Water Resources Collections and Archives is located at the University of California, Riverside and features a comprehensive collection of water-resource related documents.
For USGS water-use reports, surface water is considered freshwater when it contains less than 1,000 milligrams per liter (mg/L) of dissolved solids. [2] There are three major types of surface water. Permanent (perennial) surface waters are present year round, and includes lakes, rivers and wetlands (marshes and swamps).
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 cobalt-blue (1) down south is Basin and Range aquifers
The California State Water Project and the Central Valley Project are the two main projects diverting surface water into the valley. This system helps prevent spring flooding and summer and fall water shortages. Farmers use a combination of surface water and groundwater for irrigation. During drought years there is less surface water being ...
Groundwater that is a subterranean stream is subject to the same water right permitting requirements as surface water. California has no statewide water right permit process for regulating the use of percolating groundwater. A subterranean stream meets the following four characteristics: (1) A subsurface channel must be present; (2) The channel ...
Map of California's interconnected water system, including all eleven reservoirs over 1,000,000 acre-feet (1.2 km 3) as well as selected smaller ones.. This is a list of the largest reservoirs, or man-made lakes, in the U.S. state of California.
Clear Lake (Pomo: Lypoyomi) [2] [3] is a natural freshwater lake in Lake County in the U.S. state of California, north of Napa County and San Francisco.It is the largest natural freshwater lake wholly within the state, with 68 square miles (180 km 2) of surface area.
Northern California usually refers to the state's northernmost 48 counties. The main population centers of Northern California include San Francisco Bay Area (which includes the cities of San Francisco, Oakland, and the largest city of the region, San Jose), and Sacramento (the state capital) as well as its metropolitan area.