Flood Management

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  • 2017 Flood System Status Report

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    2017 Flood System Status Report

    California Department of Water Resources (DWR) | August 10, 2017...
    Summary

    This report is intended to assist flood management planners and engineers in characterizing facilities within the State Plan of Flood Control (SPFC) and...

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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 rationale for effective post-fire debris flow mitigation within forested terrain

    A rationale for effective post-fire debris flow mitigation within forested terrain

    Geoenvironmental Disasters, Springer | May 25, 2018...
    Summary

    Watersheds recently burned by wildfires are recognized as having an increased susceptibility to debris flow occurrence. The great majority occur within the first 2...

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  • A shift from drought to extreme rainfall drives a stable landslide to catastrophic failure

    A shift from drought to extreme rainfall drives a stable landslide to catastrophic failure

    Nature | February 7, 2019...
    Summary

    The addition of water on or below the earth’s surface generates changes in stress that can trigger both stable and unstable sliding of...

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  • A study of methods to estimate debris flow velocity

    A study of methods to estimate debris flow velocity

    Landslides, Springer | September 16, 2019...
    Summary

    Debris flow velocities are commonly back-calculated from superelevation events which require subjective estimates of radii of curvature of bends in the debris flow...

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  • A Twenty-First-Century California Observing Network for Monitoring Extreme Weather Events

    A Twenty-First-Century California Observing Network for Monitoring Extreme Weather Events

    Journal of Atmospheric and Oceanic Technology, American Meteorological Society | August 27, 2013...
    Summary

    During Northern Hemisphere winters, the West Coast of North America is battered by extratropical storms. The impact of these storms is of paramount...

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  • Accounting for Water “Wasted to the Sea”

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    Accounting for Water “Wasted to the Sea”

    San Francisco Estuary & Watershed Science | April 19, 2018...
    Summary

    Freshwater outflow from the Sacramento–San Joaquin Delta is a contentious management issue. Once mixed with salt water of San Francisco Bay, outflow is...

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  • Age Determination of the Remaining Peat in the Sacramento–San Joaquin Delta, California, USA

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    Age Determination of the Remaining Peat in the Sacramento–San Joaquin Delta, California, USA

    U.S. Geological Survey (USGS) | October 9, 2007...
    Summary

    The Sacramento–San Joaquin Delta of California was once a 1,400 square kilometer (km2) tidal marsh, which contained a vast layer of peat ranging...

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  • Brief communication: Meteorological and climatological conditions associated with the 9 January 2018 post-fire debris flows in Montecito and Carpinteria, California, USA

    Brief communication: Meteorological and climatological conditions associated with the 9 January 2018 post-fire debris flows in Montecito and Carpinteria, California, USA

    Natural Hazards and Earth System Sciences, European Geosciences Union | November 19, 2018...
    Summary

    The Thomas Fire burned 114,078 ha in Santa Barbara and Ventura counties, southern California, during December 2017–January 2018. On 9 January 2018, high-intensity rainfall...

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  • California’s Flood Future: Recommendations for Managing the State’s Flood Risk

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    California’s Flood Future: Recommendations for Managing the State’s Flood Risk

    California Department of Water Resources (DWR) | November 1, 2013...
    Summary

    California is at risk for catastrophic flooding that could have wide-ranging impacts due to the size of its economy and the number of...

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