Land Subsidence, Groundwater Levels, and Geology in the Coachella Valley, California, 1993-2010

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By Michelle Sneed (au); Justin t. Brandt (au); Mike Solt (au)
Year: 2014
Pages: 75
Binding Paperback
ISBN 978-1-4578-5699-0

Product Code: 1457856999

Description

Land subsidence associated with groundwater-level declines has been investigated by the U.S. Geological Survey (USGS) in the Coachella Valley, CA, since 1996. Groundwater has been a major source of agricultural, municipal, and domestic supply in the valley since the early 1920s. Since the late 1970s, demand for water there has exceeded deliveries of imported surface water, resulting in increased pumping and associated groundwater-level declines and, consequently, an increase in the potential for land subsidence caused by aquifer-system compaction. GPS surveying and Interferometric Synthetic Aperture Radar (InSAR) methods were used to determine the location, extent, and magnitude of the vertical land-surface changes in the southern Coachella Valley during 1993-2010. The objectives of this study were to detect and quantify land subsidence in that region from 1993 through 2010. It concludes that the surface of the ground sank by between nine inches and 2 feet from 1995 to 2010 in parts of the valley. Tables and figures. This is a print on demand report.

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