U.S. Geological Survey

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  • Advancement of Salinity and Flow Monitoring in the San Francisco Bay Delta, San Francisco Bay Delta Action Plan Implementation Support, FINAL REPORT

    Advancement of Salinity and Flow Monitoring in the San Francisco Bay Delta, San Francisco Bay Delta Action Plan Implementation Support, FINAL REPORT

    U.S. Geological Survey, U.S. Environmental Protection Agency | February 1, 2017...
    Summary

    This report evaluates the cost and utility of adding coupled surface and near-bottom salinity monitors along the axis of the San Francisco Estuary,...

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  • California’s Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California’s Central Valley

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    California’s Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California’s Central Valley

    U.S. Geological Survey (USGS) | June 16, 2009...
    Summary

    Competition for water resources is growing throughout California, particularly in the Central Valley. Since 1980, the Central Valley’s population has nearly doubled to...

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  • Geohydrologic Framework of Recharge and Seawater Intrusion in the Pajaro Valley

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    Geohydrologic Framework of Recharge and Seawater Intrusion in the Pajaro Valley

    U.S. Geological Survey (USGS), Pajaro Valley Water Management Agency | July 17, 2003...
    Summary

    The Pajaro Valley Water Management Agency (PVWMA) was established in 1984 by the State of California as the agency charged with ground-water management...

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    Geohydrology and Simulated Response to Ground-Water Pumpage in Carson Valley, A River-Dominated Basin in Douglas County, Nevada, and Alpine County, California

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    Geohydrology and Simulated Response to Ground-Water Pumpage in Carson Valley, A River-Dominated Basin in Douglas County, Nevada, and Alpine County, California

    U.S. Geological Survey, Douglas County Department of Public Works | May 2, 1986...
    Summary

    This investigation of the ground-water hydrology in Carson Valley was conducted from 1980 through 1985 by the U.S. Geological Survey, in cooperation with...

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  • Geohydrology, Geochemistry, and Ground-Water Simulation-Optimization of the Central and West Coast Basins, Los Angeles County, California By

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    Geohydrology, Geochemistry, and Ground-Water Simulation-Optimization of the Central and West Coast Basins, Los Angeles County, California By

    U.S. Geological Survey, Water Replenishment District of Southern California | January 3, 2003...
    Summary

    Historical ground-water development of the Central and West Coast Basins in Los Angeles County, California through the first half of the 20th century...

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  • Geohydrology, Geochemistry, and Groundwater Simulation (1992–2011) and Analysis of Potential Water-Supply Management Options, 2010–60, of the Langford Basin, California

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    Geohydrology, Geochemistry, and Groundwater Simulation (1992–2011) and Analysis of Potential Water-Supply Management Options, 2010–60, of the Langford Basin, California

    U.S. Geological Survey, Fort Irwin National Training Area | October 30, 2013...
    Summary

    Groundwater withdrawals began in 1992 from the Langford Basin within the Fort Irwin National Training Center (NTC), California. From April 1992 to December...

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  • Groundwater Availability of the Central Valley Aquifer, California

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    Groundwater Availability of the Central Valley Aquifer, California

    U.S. Geological Survey | June 2, 2009...
    Summary

    The purpose of this report is to describe groundwater availability in the Central Valley. The descriptions are derived largely from the study results,...

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  • Groundwater Quality in the Mojave Area, California

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    Groundwater Quality in the Mojave Area, California

    U.S. Geological Survey (USGS), California State Water Resources Control Board | January 9, 2013...
    Summary

    The Mojave study area is approximately 1,500 square miles (3,885 square kilometers) and includes four contiguous groundwater basins: Upper, Middle, and Lower Mojave...

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  • Groundwater Technical Procedures of the U.S. Geological Survey

    Groundwater Technical Procedures of the U.S. Geological Survey

    U.S. Geological Survey | April 22, 2011...
    Summary

    A series of groundwater technical procedures documents (GWPDs) has been released by the U.S. Geological Survey, Water-Resources Discipline, for general use by the...

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  • Hydrogeology, Hydrologic Effects of Development, and Simulation of Groundwater Flow in the Borrego Valley, San Diego County, California

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    Hydrogeology, Hydrologic Effects of Development, and Simulation of Groundwater Flow in the Borrego Valley, San Diego County, California

    U.S. Geological Survey, Borrego Water District | November 24, 2015...
    Summary

    The Borrego Valley is a small valley (110 square miles) in the northeastern part of San Diego County, California. Although the valley is about...

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  • Mercury Risks to Wildlife in California Lakes: Statewide Survey Finds Fish-Eating Birds at Risk in Many Lakes

    Mercury Risks to Wildlife in California Lakes: Statewide Survey Finds Fish-Eating Birds at Risk in Many Lakes

    U.S. Geological Survey | May 22, 2015...
    Summary

    Numerous water bodies in California are listed under the Clean Water Act as being impaired by mercury contamination. Mercury generally poses risks both...

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  • Nutrients in the Nation’s Streams and Groundwater: National Findings and Implications

    Nutrients in the Nation’s Streams and Groundwater: National Findings and Implications

    U.S. Geological Survey | September 1, 2010...
    Summary

    A comprehensive national analysis of the distribution and trends of nutrient concentrations in streams and groundwater from 1992 through 2004 is provided by...

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  • Preliminary Evaluation of the Hydrogeologic System in Owens Valley, California

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    Preliminary Evaluation of the Hydrogeologic System in Owens Valley, California

    U.S. Geological Survey, Los Angeles Department of Water and Power, Inyo County | January 8, 1988...
    Summary

    Owens Valley is a major source of water for southern California and presently (1986) provides more than 60 percent of the supply for...

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  • The Ground-Water Flow System in Indian Wells Valley, Kern, Inyo, and San Bernardino Counties, California

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    The Ground-Water Flow System in Indian Wells Valley, Kern, Inyo, and San Bernardino Counties, California

    U.S. Geological Survey, Indian Wells Valley Water District, U.S. Department of the Navy China Lake Naval Weapons Center | April 11, 1991...
    Summary

    Ground water is virtually the sole source of water supplies in Indian Wells Valley. Demand for ground water has increased significantly for municipal...

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