USGS

California District:

Center for InSAR Monitoring of Deforming Aquifer Systems (CIMDAS)

The California District Center for Interferometric Synthetic Aperture Radar (InSAR) Monitoring of Deforming Aquifer Systems (CIMDAS) supports USGS investigations of aquifer-system compaction and resulting land-surface elevation changes (subsidence and uplift) through the processing and interpretation of InSAR data. InSAR is a powerful tool that uses radar signals to measure deformation of the Earth's crust at unprecedented spatial detail and high degree of measurement resolution, and is often less expensive than obtaining sparse point measurements from labor-intensive spirit-leveling and Global Positioning System (GPS) surveys. CIMDAS provides InSAR support and products for USGS water-resources investigations, and has been or is presently active in arid and (or) urban areas in California, Nevada, New Mexico, Texas, and Wyoming. For additional information, contact Michelle Sneed.

EXAMPLES

PUBLICATIONS

FACT SHEETS

ABSTRACTS

USEFUL and INTERESTING LINKS

Interferogram of  Las Vegas Valley, Nevada, April 1992 to December 1997.

Amelung, Falk, Galloway, D.L., Bell, J.W., Zebker, H.A., and Laczniak, R.L., 1999, Sensing the ups and downs of Las Vegas - InSAR reveals structural control of land subsidence and aquifer-system deformation: Geology, v. 27, no 6, pp. 483-486.

Group members: Michelle Sneed, Sylvia Stork, Devin Galloway


USGS Water Resources in California
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  Contact: Michelle Sneed, micsneed@usgs.gov
URL: http://ca.water.usgs.gov/program/desert/insar/
Last modified: Wed Jan 23 2002