CIMDAS

LAS VEGAS VALLEY, NEVADA

The interferometric pair below shows primarily seasonal elastic aquifer deformation in Las Vegas Valley, Nevada, from October 1996 to September 1997. Eight seasonally paired interferograms are used in conjunction with extensometer and water level data to estimate system elastic storage coefficients for six locations in Las Vegas Valley in Hoffmann et.al (2001). Other interferograms show subsidence occurred during periods when water levels in the area were static or recovering, indicating residual compaction of the aquifer has occurred.

The interferograms also show that the northwestern subsidence bowl (northwest of the Eglington fault) is controlled on the southeastern side by the Eglington fault.

One color cycle equals 20 millimeters
	Modified from Hoffman, et.al., Water Resources Research, Vol.37, No. 6, Pages 1551-1566, June2001

Hoffmann, Jörn; Zebker, Howard A.; Galloway, Devin L.; Amelung, Falk. Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar interferometry. Water Resources Research, Vol. 37, No. 6, Pages 1551-1566, June 2001. (abstract, on-line pdf file from Jörn Hoffmann's web site)

Amelung, Falk, Galloway, D.L., Bell, J.W., Zebker, H.A., and Laczniak, R.J., 1999, Sensing the ups and downs of Las Vegas: InSAR reveals structural control of land subsidence and aquifer-system deformation: Geology, v. 27, p. 483-486. (abstract)