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The South Coast Hydrologic Subregion is composed of three third-level hydrological units. The federally-defined Southern California Coastal water resource subregion equates roughly with the state-designated South Coast hydrologic region. Per a USGS report of 1976, "Water deficiency is prevalent in the South Coastal subregion."
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. [1]
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.
It sells water to 95 percent of the South Coast region. Lake Mead, formed by Hoover Dam, is the primary reservoir in the Colorado River basin. The Colorado River Aqueduct begins 155 miles (249 km) downstream from Hoover Dam, and can carry 1.2 million acre-feet (1.5 km 3) annually.
The Laguna–San Diego Coastal water resource basin is a third-level subdivision of the United States hydrologic unit system. [1] The tiers of the classification system, in order from largest to smallest, are regions , subregions, basins (formerly accounting units), subbasins (formerly cataloging units), watersheds, and subwatersheds.
The Ventura–San Gabriel Coastal water resource basin is a third-level subdivision of the United States hydrologic unit system. [1] The Ventura–San Gabriel Coastal basin is approximately 4,530 sq mi (11,700 km 2; 2,900,000-acre) and extends from Rincon Creek on the north to the San Gabriel Basin on the south. [2]
Pages in category "California water resource region" The following 5 pages are in this category, out of 5 total. ... Ventura–San Gabriel Coastal water resource basin
In California, this plan contemplated the construction of dams on rivers draining to California's North Coast – the wild and undammed Klamath, Eel, Mad and Smith River systems – and tunnels to carry the impounded water to the Sacramento River system, where it could be diverted southwards. [9]