Integrated Murrieta-Temecula Groundwater Basin & Stream Flow Models
The Rancho California Water District (RCWD) in Riverside County overlies a 90 square-mile groundwater basin and serves more than 150,000 people.
The Murrieta-Temecula groundwater basin consists of saturated alluvial deposits that are accessed through a system of 100 deep wells. In recent years, the demands of a growing population have outstripped the natural capacity of the basin to the point that it supplied approximately half of the water required for their service area.
The District proposed to address the deficit through artificial recharge by creating 100 acres of recharge ponds to be serviced with untreated water from Vail Lake and wholesale providers. However, before they could get permits and start work, they needed a safe yield study to determine the natural recharge rate of the basin and water audits to project how many acre feet per year the system could process via artificial recharge.
The RCWD turned to Geoscience, who has served as District Hydrologist since 1988 and oversees the RCWD Groundwater Management Program. The Geoscience team referred to their annual water audits used to project groundwater production requirements and also created an integrated groundwater and streamflow model of the Murrieta-Temecula groundwater basin.
Geoscience assisted with identifying the preferred sites for the recharge ponds and assisted in supervising the construction of two-dozen large-scale production wells. In addition, Geoscience set up subsidence monitoring and performed troubleshooting for well issues.
With the help of Geoscience, the RCWD was able to augment their recharge operations to deliver sustainable, maximized yield.
Contact Johnson Yeh or Chris Coppinger to learn more about this case study.
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