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Projecting groundwater storage changes in California's Central Valley
Elias C Massoud1,2, Adam J Purdy3,4, Michelle E Miro5
1Department of Civil & Environmental Engineering, University of California, Irvine, CA, 92697, USA. elias.massoud@jpl.nasa.gov.
Scientific Reports
|August 29, 2018
Summary
California
Area of Science:
- Hydrology and Water Resources Management
- Climate Change Impact Assessment
- Agricultural Sustainability
Background:
- California's groundwater is critical for water planning, management, and its multibillion-dollar agriculture sector, especially during droughts.
- Understanding groundwater dynamics is essential for sustainable water resource management in the state.
- Prolonged droughts exacerbate the need for accurate groundwater assessments.
Purpose of the Study:
- To develop and evaluate an aggregate groundwater storage model for California's Central Valley.
- To predict future changes in groundwater storage under various climate scenarios.
- To analyze potential management strategies for groundwater sustainability.
Main Methods:
- Utilized water supply and demand data from California's Department of Water Resources.
- Developed an aggregate groundwater storage model for the Central Valley.
- Validated the model against historical data from the USGS Central Valley Hydrologic Model (CVHM) and NASA GRACE satellites.
Main Results:
- The developed model accurately simulates historical changes in groundwater storage.
- Future projections (2015-2050) indicate significant changes in groundwater storage under different precipitation scenarios.
- Simulations highlight the impact of various management strategies on groundwater levels.
Conclusions:
- Collective statewide management intervention is necessary to prevent further depletion of California's groundwater resources.
- The study underscores the importance of integrated water management strategies for long-term groundwater sustainability.
- Proactive management is crucial to mitigate the effects of climate change on water availability.
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