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The Central Valley watershed feeding into Suisun Bay via the Sacramento–San Joaquin Delta is excluded; see the following section for the Sacramento and San Joaquin river systems. For additional detail on Bay Area creeks, see List of watercourses in the San Francisco Bay Area.
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]
Beluga whales within James Bay basin could be distinct from those found in Hudson Bay. [5] Hundreds of rivers flow into James Bay. The geography of the region gives many of them similar characteristics. They tend to be wide and shallow near the Bay (in the James Bay Lowlands), whereas they are steeper and narrower farther upstream (as they pour ...
These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers. [ 1 ] [ 2 ] The California region, which is listed with a 2-digit hydrologic unit code (HUC) of 18, has an approximate size of 168,579 square miles (436,620 square kilometers ), and consists of 10 subregions, which are ...
In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state ...
Subcategories should be used for rivers which can be classified in them: Category: Rivers of Southern California — San Luis Obispo/Kern/San Bernardino and southward; see Southern California Counties.
Sacramento River (1654949) – flows from Sacramento County American River; San Joaquin River (273488) – flows from Sacramento County; For tributaries of the Sacramento and San Joaquin Rivers, see List of rivers in California. Mount Diablo Creek (234334) Hastings Slough (225003) Seal Creek; Pacheco Creek (230192) Grayson Creek (224526 ...
With an annual average discharge of approximately 1,600,000 acre feet (2.0 km 3), [6] it is the second-largest river (after the Sacramento River) flowing through the nine-county Greater San Francisco Bay Area, with a mainstem 115 mi (185 km) long.