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" Economic and Water Supply Effects of Ending Groundwater Overdraft in California's Central Valley "
Nelson, Timothy; Chou, Heidi; Zikalala, Prudentia; Lund, Jay; Hui, Rui; Medellín–Azuara, Josué
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AL
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| Record Number
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927708
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LA03r6s37v
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| Language of Document
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English
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| Main Entry
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Nelson, Timothy; Chou, Heidi; Zikalala, Prudentia; Lund, Jay; Hui, Rui; Medellín–Azuara, Josué
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| Title & Author
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Economic and Water Supply Effects of Ending Groundwater Overdraft in California's Central Valley [Article]\ Nelson, Timothy; Chou, Heidi; Zikalala, Prudentia; Lund, Jay; Hui, Rui; Medellín–Azuara, Josué
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| Title of Periodical
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San Francisco Estuary and Watershed Science
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14/1
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2016
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| Abstract
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Surface water and groundwater management are often tightly linked, even when linkage is not intended or expected. This link is especially common in semi-arid regions, such as California. This paper summarizes a modeling study on the effects of ending long-term overdraft in California’s Central Valley, the state’s largest aquifer system. The study focuses on economic and operational aspects, such as surface water pumping and diversions, groundwater recharge, water scarcity, and the associated operating and water scarcity costs. This analysis uses CALVIN, a hydro-economic optimization model for California’s water resource system that suggests operational changes to minimize net system costs for a given set of conditions, such as ending long-term overdraft. Based on model results, ending overdraft might induce some major statewide operational changes, including large increases to Delta exports, more intensive conjunctive-use operations with increasing artificial and in-lieu recharge, and greater water scarcity for Central Valley agriculture. The statewide costs of ending roughly 1.2 maf yr<sup>-1</sup> of groundwater overdraft are at least
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