American Society of Civil Engineers


Planned Updates and Refinements to the Central Valley Hydrologic Model with an Emphasis on Improving the Simulation of Land Subsidence in the San Joaquin Valley


by Claudia C. Faunt, (U.S. Geological Survey, 4165 Spruance Rd., Suite 200, San Diego, CA. E-mail: ccfaunt@usgs.gov), Randall T. Hanson, (U.S. Geological Survey, 4165 Spruance Rd., Suite 200, San Diego, CA. E-mail: rthanson@usgs.gov), Peter Martin, (U.S. Geological Survey, 4165 Spruance Rd., Suite 200, San Diego, CA. E-mail: pmmartin@usgs.gov), and Wolfgang Schmid, (University of Arizona, 1133 E James E. Rogers Way, Tucson, AZ 85721. E-mail: w_schmid@hwr.arizona.edu)
Section: 9th Symposium on Groundwater Hydrology, Quality, and Management, pp. 864-870, (doi:  http://dx.doi.org/10.1061/41173(414)88)

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Document type: Conference Proceeding Paper
Part of: World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
Abstract: California’s Central Valley has been one of the most productive agricultural regions in the world for more than 50 years. To better understand the groundwater availability in the valley, the U.S. Geological Survey (USGS) developed the Central Valley hydrologic model (CVHM). Because of recent water-level declines and renewed subsidence, the CVHM is being updated to better simulate the geohydrologic system. The CVHM updates and refinements can be grouped into two general categories: (1) model code changes and (2) data updates. The CVHM updates and refinements will require that the model be recalibrated. The updated CVHM will provide a detailed transient analysis of changes in groundwater availability and flow paths in relation to climatic variability, urbanization, stream flow, and changes in irrigated agricultural practices and crops. The updated CVHM is particularly focused on more accurately simulating the locations and magnitudes of land subsidence. The intent of the updated CVHM is to help scientists better understand the availability and sustainability of water resources and the interaction of groundwater levels with land subsidence.


ASCE Subject Headings:
Hydrologic models
Simulation
Land subsidence
California
Agriculture