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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 ...
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]
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.
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 ...
Rivers and streams in Alameda County, California. Pages in category "Rivers of Alameda County, California" The following 28 pages are in this category, out of 28 total.
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.
This page was last edited on 11 September 2016, at 09:56 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Map showing the main Orange County watersheds and watercourses. This is a list of rivers of Orange County, California, part of the Greater Los Angeles Area in Southern California.The Santa Ana River and San Gabriel River are the largest in Orange County; their extensive watersheds extend into neighboring Los Angeles, Riverside and San Bernardino Counties.