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    Statewide Effects of Ending Long-Term Groundwater Overdraft in California

    Source: Journal of Water Resources Planning and Management:;2019:;Volume ( 145 ):;issue: 009
    Author:
    Mustafa S. Dogan
    ,
    Ian Buck
    ,
    Josue Medellin-Azuara
    ,
    Jay R. Lund
    DOI: 10.1061/(ASCE)WR.1943-5452.0001096
    Publisher: American Society of Civil Engineers
    Abstract: Groundwater overdraft is a major problem globally and has been a growing problem for California for decades. This overdraft is predominantly driven by the economic value of water for agricultural production and cities. Spurred by the recent drought, California passed legislation requiring the elimination of groundwater overdraft by 2040. This paper employs a statewide hydroeconomic optimization model to explore potential water supply effects of ending long-term groundwater overdraft in California’s Central Valley for several general water policies with historical and warmer–drier climates. The model minimizes agricultural, urban scarcity, and operating costs over 82 years of historical hydrologic variability, given today’s infrastructure and environmental flow constraints. The model results assess effects of overdraft and Delta policies for different climates on water deliveries, economic costs, environmental flows, water market operations, and the economic value of expanding infrastructure capacities. Prohibiting long-term overdraft leads to reduced agricultural water use and reoperations, and reduced outflows to the sea from the Sacramento-San Joaquin Delta, where water availability policies become important. In combination with a warmer–drier climate, ending overdraft further exacerbates water scarcities, increases environmental and economic costs, and increases the marginal economic value of water exports from the Delta, which are likely to worsen water conflicts and illustrate connections of California’s groundwater and surface water problems. Economically useful adaptation actions include more water transfers involving the Delta, water markets, and trades; conjunctive use of surface water and groundwater; and recycled wastewater supplies for coastal urban users.
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      Statewide Effects of Ending Long-Term Groundwater Overdraft in California

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    contributor authorMustafa S. Dogan
    contributor authorIan Buck
    contributor authorJosue Medellin-Azuara
    contributor authorJay R. Lund
    date accessioned2019-09-18T10:38:23Z
    date available2019-09-18T10:38:23Z
    date issued2019
    identifier other%28ASCE%29WR.1943-5452.0001096.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4259681
    description abstractGroundwater overdraft is a major problem globally and has been a growing problem for California for decades. This overdraft is predominantly driven by the economic value of water for agricultural production and cities. Spurred by the recent drought, California passed legislation requiring the elimination of groundwater overdraft by 2040. This paper employs a statewide hydroeconomic optimization model to explore potential water supply effects of ending long-term groundwater overdraft in California’s Central Valley for several general water policies with historical and warmer–drier climates. The model minimizes agricultural, urban scarcity, and operating costs over 82 years of historical hydrologic variability, given today’s infrastructure and environmental flow constraints. The model results assess effects of overdraft and Delta policies for different climates on water deliveries, economic costs, environmental flows, water market operations, and the economic value of expanding infrastructure capacities. Prohibiting long-term overdraft leads to reduced agricultural water use and reoperations, and reduced outflows to the sea from the Sacramento-San Joaquin Delta, where water availability policies become important. In combination with a warmer–drier climate, ending overdraft further exacerbates water scarcities, increases environmental and economic costs, and increases the marginal economic value of water exports from the Delta, which are likely to worsen water conflicts and illustrate connections of California’s groundwater and surface water problems. Economically useful adaptation actions include more water transfers involving the Delta, water markets, and trades; conjunctive use of surface water and groundwater; and recycled wastewater supplies for coastal urban users.
    publisherAmerican Society of Civil Engineers
    titleStatewide Effects of Ending Long-Term Groundwater Overdraft in California
    typeJournal Paper
    journal volume145
    journal issue9
    journal titleJournal of Water Resources Planning and Management
    identifier doi10.1061/(ASCE)WR.1943-5452.0001096
    page04019035
    treeJournal of Water Resources Planning and Management:;2019:;Volume ( 145 ):;issue: 009
    contenttypeFulltext
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