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USGS is studying land subsidence in relation to water-project canals in California’s Central Valley.

This type of subsidence has occurred as a result of the extraction of groundwater for agricultural and municipal use. This extraction increased in some areas during California’s recent drought (2012-2016), which was exceptionally severe and prolonged. The USGS studies are helping to inform water-project maintenance activities and preserve the integrity of water-conveyance systems, such as the Delta-Mendota Canal and the California Aqueduct in California.


For more information see:

Current Land Subsidence in the San Joaquin Valley

Global Positioning System Surveying and Interferometric Synthetic Aperture Radar to Assess Land Subsidence in the Coachella Valley, California


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