Geochemistry

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  • 2017 Salinas Valley Groundwater Level Contours & Seawater Intrusion Maps

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    2017 Salinas Valley Groundwater Level Contours & Seawater Intrusion Maps

    Monterey County Water Resources Agency (MCWRA) | April 24, 2018...
    Summary

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  • A hybrid machine learning model to predict and visualize nitrate concentration throughout the Central Valley aquifer, California, USA

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    A hybrid machine learning model to predict and visualize nitrate concentration throughout the Central Valley aquifer, California, USA

    Science of the Total Environment | June 9, 2017...
    Summary

    Intense demand forwater in the Central Valley of California and related increases in groundwater nitrate concentration threaten the sustainability of the groundwater resource....

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  • A Water Resources Data Network Evaluation for Monterey County, California; Phase 1; South County

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    A Water Resources Data Network Evaluation for Monterey County, California; Phase 1; South County

    U..S. Geological Survey, Monterey County Flood Control and Water Conservation District | July 12, 1986...
    Summary

    An evaluation made of rainfall, surface water, groundwater, and water quality monitoring networks in Salinas River basin in southern Monterey County, California, proposed...

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  • A Water Resources Data Network Evaluation for Monterey County, California; Phase 3, Northern Salinas River Drainage Basin

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    A Water Resources Data Network Evaluation for Monterey County, California; Phase 3, Northern Salinas River Drainage Basin

    U.S. Geological Survey, Monterey County Flood Control and Water Conservation District | December 13, 1990...
    Summary

    Continuing data collection and analysis are vital to efficient development and management of water resources. To insure that water managers have adequate information...

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  • A Water Resources Data-Network Evaluation for Monterey County, California, Phase 3: Northern Salinas River Drainage Basin

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    A Water Resources Data-Network Evaluation for Monterey County, California, Phase 3: Northern Salinas River Drainage Basin

    U.S. Geological Survey, Monterey County Flood Control and Water Conservation District | December 15, 1990...
    Summary

    This report presents an evaluation of water resources data collection networks in the northern Salinas River drainage basin, Monterey County, California. The evaluation,...

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  • Alamitos Barrier Project: Annual Report on the Control of Seawater Intrusion 2016-2017

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    Alamitos Barrier Project: Annual Report on the Control of Seawater Intrusion 2016-2017

    Los Angeles County Department of Public Works | June 30, 2017...
    Summary

    The Alamitos Barrier Project (ABP) was designed and constructed to protect the groundwater supplies of the Central/Orange County Basin of the Coastal Plain...

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  • Bulletin No. 52-B Salinas Basin Investigation Summary Report

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    Bulletin No. 52-B Salinas Basin Investigation Summary Report

    California Department of Water Resources, formerly State Department of Public Works Division of Water Resources | December 13, 1946...
    Summary

    The Board of Supervisors and the Flood Control and Water Conservation Conmittee of the County of Monterey became concerned in April 1944 over...

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  • California’s Groundwater Update 2013: A Compilation of Enhanced Content for California Water Plan Update 2013

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    California’s Groundwater Update 2013: A Compilation of Enhanced Content for California Water Plan Update 2013

    California Department of Water Resources (DWR) | April 1, 2015...
    Summary

    The primary goal of California’s Groundwater Update 2013: A Compilation of Enhanced Content for California Water Plan Update 2013 (California’s Groundwater Update 2013)...

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  • Characterizing Nitrates in Central Coast Groundwater

    Characterizing Nitrates in Central Coast Groundwater

    Central Coast Groundwater Coalition (CCGC) | April 1, 2016...
    Summary

    The Central Coast Groundwater Coalition (CCGC) is a third-party cooperative groundwater monitoring program that was established for landowners/operators in the Central Coast region...

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  • Data from a Thick Unsaturated Zone Underlying Oro Grande and Sheep Creek Washes in the Western Part of the Mojave Desert, near Victorville, San Bernardino County, California

    Data from a Thick Unsaturated Zone Underlying Oro Grande and Sheep Creek Washes in the Western Part of the Mojave Desert, near Victorville, San Bernardino County, California

    U.S. Geological Survey | January 1, 2000...
    Summary

    This report presents data collected as part of a cooperative study of infiltration and groundwater recharge to the regional aquifer near Victorville, California....

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  • Dry groundwater wells in the western United States

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    Dry groundwater wells in the western United States

    Environmental Research Letters | July 28, 2017...
    Summary

    Declining groundwater levels are common in parts of the western US, but their impact on the ability of wells to pump groundwater is...

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  • Evaluation of a Ground-Water Flow and Transport Model of the Upper Coachella Valley, California

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    Evaluation of a Ground-Water Flow and Transport Model of the Upper Coachella Valley, California

    U.S. Geological Survey; California Regional Water Quality Control Board, Colorado River Basin Region | June 25, 1992...
    Summary

    A geohydrologic data base was compiled to evaluate the changes in ground-water conditions in the upper Coachella Valley, California, since 1978, when the...

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  • Evaluation of Geohydrologic Framework, Recharge Estimates, and Ground-Water Flow of the Joshua Tree Area, San Bernardino County, California

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    Evaluation of Geohydrologic Framework, Recharge Estimates, and Ground-Water Flow of the Joshua Tree Area, San Bernardino County, California

    U.S. Geological Survey, Joshua Basin Water District | February 7, 2005...
    Summary

    Ground water historically has been the sole source of water supply for the community of Joshua Tree in the Joshua Tree ground-water subbasin...

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  • Evaluation of Processes Affecting 1,2-Dibromo-3-Chloropropane (DBCP) Concentrations in Ground Water in the Eastern San Joaquin Valley, California: Analysis of Chemical Data and Ground-Water Flow and Transport Simulations

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    Evaluation of Processes Affecting 1,2-Dibromo-3-Chloropropane (DBCP) Concentrations in Ground Water in the Eastern San Joaquin Valley, California: Analysis of Chemical Data and Ground-Water Flow and Transport Simulations

    U.S. Geological Survey, University of California - Davis | December 17, 1999...
    Summary

    Future use of the sole-source aquifer near Fresno in the eastern San Joaquin Valley, California, will depend, in part, on how long 1,2-dibromo-3-chloropropane...

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  • Evaluation of the Source and Transport of High Nitrate Concentrations in Ground Water, Warren Subbasin, California

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    Evaluation of the Source and Transport of High Nitrate Concentrations in Ground Water, Warren Subbasin, California

    U.S. Geological Survey, Hi-Desert Water Agency, Mojave Water Agency | December 13, 2003...
    Summary

    From early 1995 through 2001, nitrate (NO3) concentrations in ground water in the Warren subbasin, California, increased from a background concentration of 10...

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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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  • Geohydrological Characterization, Water-Chemistry, and Ground-Water Flow Simulation Model of the Sonoma Valley Area, Sonoma County, California

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    Geohydrological Characterization, Water-Chemistry, and Ground-Water Flow Simulation Model of the Sonoma Valley Area, Sonoma County, California

    U.S. Geological Survey, Sonoma County Water Agency | December 14, 2006...
    Summary

    Sonoma County is in the northern part of the greater San Francisco Bay region, an area of Northern California that has experienced rapid...

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  • Geohydrology and Water Chemistry of the Alexander Valley, Sonoma County, California

    Geohydrology and Water Chemistry of the Alexander Valley, Sonoma County, California

    U.S. Geological Survey (USGS), Sonoma County Water Agency | January 12, 2006...
    Summary

    This study of the geohydrology and water chemistry of the Alexander Valley, California, was done to provide an improved scientific basis for addressing emerging...

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  • Geohydrology of Recharge and Seawater Intrusion in the Pajaro Valley, Santa Cruz and Monterey Counties, California

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    Geohydrology of Recharge and Seawater Intrusion in the Pajaro Valley, Santa Cruz and Monterey Counties, California

    U.S. Geological Survey, Pajaro Valley Water Management Agency | August 14, 2003...
    Summary

    The U.S. Geological Survey (USGS) in cooperation with the Pajaro Valley Water Management Agency (PVWMA), has completed the collection and analyses of geologic,...

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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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