Federal Water Quality

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  • A Field Guide to the Identification of the Ordinary High Water Mark (OHWM) in the Arid West Region of the Western United States: A Delineation Manual

    A Field Guide to the Identification of the Ordinary High Water Mark (OHWM) in the Arid West Region of the Western United States: A Delineation Manual

    U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory | August 1, 2008...
    Summary

    The Ordinary High Water Mark (OHWM) is an approach for identifying the lateral limits of non-wetland waters. However, determining whether any non-wetland water...

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  • A Guide to Ordinary High Water Mark (OHWM) Delineation for Non-Perennial Streams in the Western Mountains, Valleys, and Coast Region of the United States

    A Guide to Ordinary High Water Mark (OHWM) Delineation for Non-Perennial Streams in the Western Mountains, Valleys, and Coast Region of the United States

    U.S. Army Corps of Engineers (USACE) | August 14, 2014...
    Summary

    Federal regulations define the ordinary high water mark (OHWM) as “that line on the shore established by the fluctuations of water and indicated...

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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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  • 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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  • An Evaluation of Compensatory Mitigation Projects Permitted Under Clean Water Act Section 401 by the California State Water Resources Control Board, 1991-2002

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    An Evaluation of Compensatory Mitigation Projects Permitted Under Clean Water Act Section 401 by the California State Water Resources Control Board, 1991-2002

    California State Water Resources Control Board | August 2, 2008...
    Summary

    The purpose of this project, which was funded by the California State Water Resources Control Board (SWRCB), was to evaluate the compliance and...

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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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  • An Introduction to High-Frequency Nutrient and Biogeochemical Monitoring for the Sacramento– San Joaquin Delta, Northern California

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    An Introduction to High-Frequency Nutrient and Biogeochemical Monitoring for the Sacramento– San Joaquin Delta, Northern California

    U.S. Geological Survey (USGS), Delta Regional Monitoring Program | July 11, 2017...
    Summary

    This report is the first in a series of three reports that provide information about high-frequency (HF) nutrient and biogeochemical monitoring in the...

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  • Assessing the Health of Southern California Streams

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    Assessing the Health of Southern California Streams

    California State Water Resources Control Board | April 14, 2011...
    Summary

    There are over 4,200 miles of perennial streams in the coastal watersheds of Southern California. Effective protection and management of these resources require...

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  • Clean Water Act Jurisdiction Following the U.S. Supreme Court’s Decision in Rapanos v. United States & Carabell v. United States

    Clean Water Act Jurisdiction Following the U.S. Supreme Court’s Decision in Rapanos v. United States & Carabell v. United States

    U.S. Environmental Protection Agency (EPA) | December 2, 2008...
    Summary

    Congress enacted the Clean Water Act ("CWA" or "the Act") "to restore and maintain the chemical, physical, and biological integrity of the Nation's...

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  • Clean Water, Clean Beaches Water Quality Funding Measure*

    Clean Water, Clean Beaches Water Quality Funding Measure*

    Los Angeles County Department of Public Works, Los Angeles County Flood Control District | September 21, 2012...
    Summary

    The Problem: Stormwater and runoff rushes down the street, picking up trash and toxic pollutants. On a rainy day, over 10 billion gallons...

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