Geohydrology

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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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  • 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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  • Changing ecosystems: a brief ecological history of the Delta

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    Changing ecosystems: a brief ecological history of the Delta

    U.C. Davis Center for Watershed Sciences | February 15, 2010...
    Summary

    The San Francisco Estuary is a young estuary, about 6-10,000 years old in its present location. It became established during periods of high...

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  • Estimating reservoir sedimentation rates at large spatialand temporal scales: A case study of California

    Estimating reservoir sedimentation rates at large spatialand temporal scales: A case study of California

    Water Resources Research, American Geophysical Union (AGU) | December 25, 2009...
    Summary

    Previous reservoir sedimentation models have ignored two key factors for large spatial and temporal modeling of multiple reservoirs: trapping by upstream dams and decreasing sediment...

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  • Flood Management in California

    Flood Management in California

    Water, Multidisciplinary Digital Publishing Institute (MDPI) | February 14, 2012...
    Summary

    California’s development and success have been shaped by its ability to manage floods. This management has varied over the history of California’s economic and...

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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 (USGS), 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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  • Objective definition of rainfall intensity-duration thresholds for the initiation of post-fire debris flows in southern California

    Objective definition of rainfall intensity-duration thresholds for the initiation of post-fire debris flows in southern California

    Landslides, Springer | June 27, 2012...
    Summary

    Rainfall intensity–duration (ID) thresholds are commonly used to predict the temporal occurrence of debris flows and shallow landslides. Typically, thresholds are subjectively defined as the upper...

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  • Sediment Supply to San Francisco Bay, Water Years 1995 through 2016: Data, trends, and monitoring recommendations to support decisions about water quality, tidal wetlands, and resilience to sea level rise

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    Sediment Supply to San Francisco Bay, Water Years 1995 through 2016: Data, trends, and monitoring recommendations to support decisions about water quality, tidal wetlands, and resilience to sea level rise

    San Francisco Estuary Institute | June 11, 2018...
    Summary

    Knowledge of the status and trends of sediment supply to San Francisco Bay is critically important for management decisions about dredging, marsh restoration,...

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