Eastern San Joaquin County Groundwater Resource Planning Model Development and Calibration

by Najmus Saquib,
Young Yoon,
Mike Cornelius,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract: An Integrated Groundwater Surface Water Model (IGSM) has been developed for the Eastern San Joaquin County in the Central Valley of California to evaluate the future water resources management strategies for the area. This largely agricultural area is supplied both by groundwater and surface water. During the 1970–1990 period, about 60 percent of the total water need in the area was met by groundwater; surface water supplied the rest of the demand. The groundwater supply comes from the underlying aquifer, which is part of a larger regional groundwater basin, called the Central Valley groundwater basin. The surface water supply comes from Sierra Nevada streams, which flow westwards from the Sierra mountains in the east across the valley floor to the Sacramento–San Joaquin Delta of the Pacific Ocean. Stream flows are diverted for water use both within and outside the watershed. A complex water rights system regulates the stream diversions for use and storage. Streamfiows are also regulated to maintain minimum amounts for fish and wildlife needs and for power generation, flood control, salinity control, and delta water quality protection.

Subject Headings: Water resources | Hydrologic models | Calibration | Groundwater | Streamflow | Surface water | Groundwater supply | Resource management | Groundwater management | North America | United States | Nevada | California | Pacific Ocean

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