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  2. List of California hydrologic regions - Wikipedia

    en.wikipedia.org/wiki/List_of_California...

    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]

  3. California water resource region - Wikipedia

    en.wikipedia.org/wiki/California_Water_Resource...

    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.

  4. Southern California Coastal water resource subregion

    en.wikipedia.org/wiki/Southern_California...

    The drainage into the Pacific Ocean from the San Gabriel River Basin boundary to the Moro Canyon drainage boundary near Laguna Beach, California. Los Angeles County, Orange County: 2,680 sq mi (6,900 km 2) HUC180202: 180703 Laguna–San Diego Coastal water resource basin

  5. Water in California - Wikipedia

    en.wikipedia.org/wiki/Water_in_California

    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]

  6. Septic drain field - Wikipedia

    en.wikipedia.org/wiki/Septic_drain_field

    Septic drain fields, also called leach fields or leach drains, are subsurface wastewater disposal facilities used to remove contaminants and impurities from the liquid that emerges after anaerobic digestion in a septic tank. Organic materials in the liquid are catabolized by a microbial ecosystem. A septic drain field, a septic tank, and ...

  7. Imperial Valley - Wikipedia

    en.wikipedia.org/wiki/Imperial_Valley

    Imperial Valley can loosely categorize its cities and communities into three regions: the Salton Beach Towns, Desert Cities, and the El Centro area (urbanized Imperial). The Salton Sea Beach Towns have the smallest cities but were resorts in their heyday and have since shrunk in population and size due to the current state of the Salton Sea.

  8. Watertable control - Wikipedia

    en.wikipedia.org/wiki/Watertable_control

    In geotechnical engineering, watertable control is the practice of controlling the height of the water table by drainage.Its main applications are in agricultural land (to improve the crop yield using agricultural drainage systems) and in cities to manage the extensive underground infrastructure that includes the foundations of large buildings, underground transit systems, and extensive ...

  9. List of municipalities in California - Wikipedia

    en.wikipedia.org/wiki/List_of_municipalities_in...

    California law makes no distinction between "city" and "town", and municipalities may use either term in their official names. [6] They can be organized as either a charter municipality, governed by its own charter, or a general-law municipality (or "code city"), governed by state statute.

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