hydrology

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  • Atmospheric Rivers, Floods and the Water Resources of California

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    Atmospheric Rivers, Floods and the Water Resources of California

    | April 5, 2011...
    Summary

    California’s highly variable climate and growing water demands combine to pose both water-supply and flood-hazard challenges to resource managers. Recently important efforts to...

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  • Development and Interpretation of Daily Seasonal Water Supply Forecasts

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    Development and Interpretation of Daily Seasonal Water Supply Forecasts

    USDA/NRCS | February 26, 2009...
    Summary

    This Technical Note documents the process used to develop the Daily Water Supply Forecast procedures and serves as a guide for helping users...

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  • Emerging trends in global freshwater availability

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    Emerging trends in global freshwater availability

    Nature | May 17, 2018...
    Summary

    Freshwater availability is changing worldwide. Here we quantify 34 trends in terrestrial water storage observed by the Gravity Recovery and Climate Experiment (GRACE)...

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  • Estimating Historical California Precipitation Phase Trends Using Gridded Precipitation, Precipitation Phase, and Elevation Data

    Estimating Historical California Precipitation Phase Trends Using Gridded Precipitation, Precipitation Phase, and Elevation Data

    Department of Water Resources | July 18, 2014...
    Summary

    Climate change projections for California indicate reduction in the percentage of precipitation that falls as snow, and increase in the percentage that falls...

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  • From the Sierra to the Sea: The Ecological History of the San Francisco Bay-Delta Watershed

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    From the Sierra to the Sea: The Ecological History of the San Francisco Bay-Delta Watershed

    The Bay Institute | January 1, 1998...
    Summary

    A vast watershed connects the mountain streams surrounding California’s Central Valley with San Francisco Bay and the ocean beyond. Over the course of...

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  • Functional Flows in Modified Riverscapes: Hydrographs, Habitats and Opportunities

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    Functional Flows in Modified Riverscapes: Hydrographs, Habitats and Opportunities

    BioScience | August 5, 2015...
    Summary

    Building on previous environmental flow discussions and a growing recognition that hydrogeomorphic processes are inherent in the ecological functionality and biodiversity of riverscapes,...

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  • Governing California Through Climate Change

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    Governing California Through Climate Change

    Little Hoover Commission | July 1, 2014...
    Summary

    State government, which guided California through the instability of the Great Depression, managed the profound disruptions of World War II and steered, during...

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  • Managing Floods in California

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    Managing Floods in California

    Legislative Analyst's Office | March 22, 2017...
    Summary

    This report is intended to provide basic information about floods and flood management in California. (Whereas previous generations referred to “flood control” or...

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  • Sacramento and San Joaquin river basins: Procedures for hydrologic analysis

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    Sacramento and San Joaquin river basins: Procedures for hydrologic analysis

    Army Corps of Engineers | September 9, 2008...
    Summary

    The primary purpose of this document is to describe the methods and procedures we will use to complete the hydrologic analysis of the...

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  • Snow Survey Procedure Manual

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    Snow Survey Procedure Manual

    Department of Water Resources | October 1, 2014...
    Summary

    By any measure, California’s agriculture, hydroelectric production, domestic use, riparian health, and recreation all put tremendous demands on the state’s often limited water...

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  • The Coming Megafloods

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    The Coming Megafloods

    Scientific American | May 5, 2013...
    Summary

    Huge flows of vapor in the atmosphere, dubbed “atmospheric rivers,” have unleashed massive floods every 200 years, and climate change could bring more...

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  • Water Supply Forecasting

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    Water Supply Forecasting

    USDA/NRCS | March 9, 2011...
    Summary

    Chapter 7: Part 622 Snow Survey and Water Supply Forecasting from the National Engineering Handbook The U.S. Department of Agriculture (USDA) Natural Resources Conservation...

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  • Water Year 2017: What a Difference a Year Makes

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    Water Year 2017: What a Difference a Year Makes

    Department of Water Resources | October 2, 2017...
    Summary

    Water year 2017 (October 1, 2016 to September 30, 2017) dramatically illustrated the variability in California’s annual precipitation, ending the state’s 5-year drought...

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  • Workshop on Improving Sub-Seasonal and Seasonal Precipitation Forecasting for Drought Preparedness

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    Workshop on Improving Sub-Seasonal and Seasonal Precipitation Forecasting for Drought Preparedness

    Department of Water Resources | October 15, 2015...
    Summary

    Skillful sub-seasonal (monthly) to seasonal (the water year) precipitation forecasting would support many facets of water management, providing lead time for preparing for...

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