Southern California Coastal water resource subregion

Last updated
Water resource basins of the Southern California coastal subregion (HUC 1807) HUC1807.jpg
Water resource basins of the Southern California coastal subregion (HUC 1807)

Southern California Coastal water resource subregion (HUC 1807) is one of 10 hydrologic subregions within the California water resource region and is one of 222 water resource subregions in the United States hydrologic unit system. The Southern California coastal subregion, sometimes called the South Coast Hydrologic Subregion, is a second-level subdivision [1] covering is approximately 11,000 sq mi (28,000 km2; 7,000,000-acre) and extends from Rincon Creek on the north to the international border with Mexico on the south. [2] 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." [3] By 1955 the region was found to be experiencing measurable levels of saltwater intrusion due to overdrawn aquifers and several wells were abandoned as a consequence. [3] Part of the solution was injecting Colorado River water from the aqueduct into local wells to defend against the salted water, a practice called artificial recharge. [3]

Contents

List of Southern California Coastal subregion basins

Basin HUC [4] Basin name [4] Basin descriptionBasin location [4] Basin size [4] Basin map
180701 Ventura–San Gabriel Coastal water resource basin The drainage into the Pacific Ocean from the Rincon Creek Basin boundary to and including the San Gabriel River Basin. [5] Ventura County, Los Angeles County 4,530 sq mi (11,700 km2)
HUC180201 HUC 180701 01.jpg
HUC180201
180702 Santa Ana water resource basin 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 km2)
HUC180202 HUC 180702.jpg
HUC180202
180703 Laguna–San Diego Coastal water resource basin The drainage within the United States that discharges into the Pacific Ocean from and including the Moro Canyon drainage basin near Laguna Beach to the California–Baja California international boundary Orange County, San Diego County 3,860 sq mi (10,000 km2)
HUC180203 HUC 180703.jpg
HUC180203

See also

Related Research Articles

<span class="mw-page-title-main">Water resource region</span>

A water resource region is the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units as part of the U.S. hydrologic unit system.

<span class="mw-page-title-main">South Atlantic–Gulf water resource region</span> Drainage region

The South Atlantic–Gulf 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Mid Atlantic water resource region</span> US hydrologic region

The Mid Atlantic 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Upper Mississippi water resource region</span>

The Upper Mississippi 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Lower Mississippi water resource region</span>

The Lower Mississippi 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Rio Grande water resource region</span>

The Rio Grande 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Lower Colorado water resource region</span> Major geographic area

The Lower Colorado 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Great Basin water resource region</span>

The Great Basin 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Pacific Northwest water resource region</span>

The Pacific Northwest 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">California water resource region</span> Surface water, first-level USGS hydrologic system subdivision

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. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Alaska water resource region</span>

The Alaska 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Caribbean water resource region</span>

The Caribbean 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Souris–Red–Rainy water resource region</span>

The Souris–Red–Rainy region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Texas–Gulf water resource region</span>

The Texas–Gulf 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 to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

<span class="mw-page-title-main">Hydrologic unit system (United States)</span> Watershed tracking system

In order to advantage hydrologists, ecologists and water-resource managers in the study of "water, its properties and laws, and its distribution over the earth's surface" in the United States, the United States Geological Survey created a hierarchical system of hydrologic units.

<span class="mw-page-title-main">Ventura–San Gabriel Coastal water resource basin</span> Third-level USGS hydrologic unit system subdivision

Ventura–San Gabriel Coastal water resource basin is one of three hydrologic basins within the Southern California Coastal water resource subregion and is one of approximately 2,200 water resource basins in the United States hydrologic unit system. The Ventura–San Gabriel Coastal water resource basin is a third-level subdivision of the United States hydrologic unit system.

<span class="mw-page-title-main">South Coast hydrologic region</span> Regional subdivision, CA Dept of Water Resources

The South Coast hydrologic region of California is one of the 10 major hydrologic regions of the state as identified by the California Department of Water Resources. The South Coast hydrologic region has a surface area of about 11,100 sq mi (29,000 km2), and includes all of Orange County, major portions of Los Angeles, Riverside, San Bernardino, San Diego, and Ventura counties, and a small portion of Santa Barbara County. The state-defined South Coast hydrologic region is roughly equivalent to the federally-defined Southern California Coastal water resource subregion. The South Coast hydrologic region has 78 state-recognized alluvial groundwater basins and subbasins.

<span class="mw-page-title-main">Northern Mojave–Mono Lake water resource subregion</span> Second-level USGS hydrologic unit system subdivision

Northern Mojave–Mono Lake water resource subregion is one of 10 water resource subregions within the California water resource region and is one of 222 water resource subregions in the federally organized United States hydrologic unit system.

<span class="mw-page-title-main">Santa Ana water resource basin</span> Third-level USGS hydrologic unit system subdivision

Santa Ana water resource basin is one of three hydrologic basins within the Southern California Coastal water resource subregion and is one of approximately 2,200 water resource basins in the United States hydrologic unit system. The Santa Ana water resource basin is a third-level subdivision of the United States hydrologic unit system.

<span class="mw-page-title-main">Laguna–San Diego Coastal water resource basin</span> Third-level USGS hydrologic unit system subdivision

Laguna–San Diego Coastal water resource basin is one of three hydrologic basins within the Southern California Coastal water resource subregion and is one of approximately 2,200 water resource basins in the United States hydrologic unit system.

References

  1. ↑ "Hydrologic Unit Maps". USGS . Retrieved 2016-10-12.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  2. ↑ "Boundary Descriptions and Names of Regions, Subregions, Accounting Units and Cataloging Units from the 1987 USGS Water-Supply Paper 2294". USGS Water Resources. Retrieved 2023-03-18.
  3. 1 2 3 Summary Appraisals of the Nation's Ground-Water Resources-California Region GEOLOGICAL SURVEY PROFESSIONAL PAPER 813-E, https://pubs.usgs.gov/pp/0813e/report.pdf
  4. 1 2 3 4 McManamay RA, Bevelhimer MS, Kao SC, Yaxing W, Martinez-Gonzalez M, Samu N (2013). "National Hydropower Asset Assessment Environmental Attribution". USGS-Oak Ridge National Laboratory . Retrieved 2016-10-12.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  5. ↑ Codes for the identification of hydrologic units in the United States (PDF). National Institute of Standards. pp. A109–A110.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.