Central Valley

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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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  • An Index of Biotic Integrity (IBI) for Perennial Streams in California’s Central Valley

    An Index of Biotic Integrity (IBI) for Perennial Streams in California’s Central Valley

    California State Water Resources Control Board | December 1, 2008...
    Summary

    Bioassessment is the science of using aquatic organisms as indicators of ecological condition in streams in rivers. Many types of organisms can be...

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  • Assessment of Interconnected Subbasins

    Assessment of Interconnected Subbasins

    Butte County | June 30, 2017...
    Summary

    The Sustainable Groundwater Management Act (SGMA) requires groundwater sustainability agencies (GSAs) to develop groundwater sustainability plans (GSPs) that achieve sustainable groundwater management within...

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  • Assessment of Interconnected Subbasins: Regional Collaboration and Model Selection Process

    Assessment of Interconnected Subbasins: Regional Collaboration and Model Selection Process

    Groundwater Resources Association of California | October 3, 2017...
    Summary

    In basins with complex spatial and temporal variations in water budget components, integrated groundwater-surface water modeling is the best approach to quantify and...

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  • Better late than never: a synthesis of strategic land retirement and restoration in California

    Better late than never: a synthesis of strategic land retirement and restoration in California

    Ecosphere | August 10, 2018...
    Summary

    Strategic retirement and restoration of agricultural lands is a critical conservation opportunity globally. The objective of this synthesis was to examine whether ecological habitat...

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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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  • Detections of current-use pesticides at 12 surface water sites in California during a 2-year period beginning in 2015

    Detections of current-use pesticides at 12 surface water sites in California during a 2-year period beginning in 2015

    U.S. Geological Survey (USGS), Central Valley Regional Water Quality Control Board | July 27, 2018...
    Summary

    Surface water samples were collected by the U.S. Geological Survey and multiple cooperators during base flow/irrigation runoff and storm runoff conditions from 12...

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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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  • Estimates of Natural and Unimpaired Flows for the Central Valley of California: Water Years 1922-2014 (draft)

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    Estimates of Natural and Unimpaired Flows for the Central Valley of California: Water Years 1922-2014 (draft)

    California Department of Water Resources (DWR) | March 1, 2016...
    Summary

    Estimating regional water supplies that would have occurred absent human activities is a common practice in water resources planning. In this report, such...

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  • Estimating the permanent loss of groundwater storage in the southern San Joaquin Valley, California

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    Estimating the permanent loss of groundwater storage in the southern San Joaquin Valley, California

    American Geophysical Union Water Resources Research | February 23, 2017...
    Summary

    In the San Joaquin Valley, California, recent droughts starting in 2007 have increased the pumping of groundwater, leading to widespread subsidence. In the...

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  • Faulting caused by groundwater level declines, San Joaquin Valley, California

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    Faulting caused by groundwater level declines, San Joaquin Valley, California

    Water Resources Research, American Geophysical Union | December 18, 1980...
    Summary

    Approximately 230 mm of aseismic vertical offset of the land surface across the Pond?Poso Creek fault in the San Joaquin Valley, California, probably...

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  • Groundwater and Stream Interaction in California’s Central Valley: Insights for Sustainable Groundwater Management

    Groundwater and Stream Interaction in California’s Central Valley: Insights for Sustainable Groundwater Management

    The Nature Conservancy | June 16, 2016...
    Summary

    Sustainable water management requires ensuring ecosystem water needs are met in balance with water needs for people. The Nature Conservancy (TNC) is working...

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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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  • HEC-HMS Models for the Sacramento and San Joaquin River Basins Comprehensive Study

    HEC-HMS Models for the Sacramento and San Joaquin River Basins Comprehensive Study

    U.S. Army Corps of Engineers Sacramento District | August 1, 2001...
    Summary

    Due to several large and damaging flood events on the Sacramento and San Joaquin Rivers (California) during the 1980s and 1990s, the U.S....

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  • Impact of extreme drought and incentive programs on flooded agriculture and wetlands in California’s Central Valley

    Impact of extreme drought and incentive programs on flooded agriculture and wetlands in California’s Central Valley

    PeerJ | June 29, 2018...
    Summary

    Between 2013 and 2015, a large part of the western United States, including the Central Valley of California, sustained an extreme drought. The...

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  • Impacts of the California Drought from 2007 to 2009: Surprising Outcomes for California’s Agriculture, Energy, and Environment

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    Impacts of the California Drought from 2007 to 2009: Surprising Outcomes for California’s Agriculture, Energy, and Environment

    Pacific Institute | June 16, 2011...
    Summary

    California’s three-year drought, which ended with this season’s cool and wet weather, had complicated and serious impacts that have been poorly understood and...

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  • Quantifying anthropogenic contributions to century-scale groundwater salinity changes, San Joaquin Valley, California, USA

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    Quantifying anthropogenic contributions to century-scale groundwater salinity changes, San Joaquin Valley, California, USA

    Science of the Total Environment | June 15, 2018...
    Summary

    Total dissolved solids (TDS) concentrations in groundwater tapped for beneficial uses (drinking water, irrigation, freshwater industrial) have increased on average by about 100...

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  • Salinity Management Strategy Report

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    Salinity Management Strategy Report

    Central Valley Region Water Quality Control Board | July 29, 2008...
    Summary

    The mission of the Central Valley Salinity Policy Group is to work closely, in a collaborative manner to create a comprehensive Central Valley...

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  • Water availability and land subsidence in the Central Valley, California, USA

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    Water availability and land subsidence in the Central Valley, California, USA

    Hydrogeology Journal | November 17, 2015...
    Summary

    The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This...

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  • Water Stress and a Changing San Joaquin Valley

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    Water Stress and a Changing San Joaquin Valley

    Public Policy Institute of California | March 1, 2017...
    Summary

    The San Joaquin Valley—California’s largest agricultural region, and an important contributor to the nation’s food supply—is in a time of great change and...

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