Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar interferometry

Jörn Hoffmann, Howard A. Zebker, Devin L. Galloway, Falk C Amelung

Research output: Contribution to journalArticle

202 Citations (Scopus)

Abstract

Analyses of areal variations in the subsidence and rebound occurring over stressed aquifer systems, in conjunction with measurements of the hydraulic head fluctuations causing these displacements, can yield valuable information about the compressibility and storage properties of the aquifer system. Historically, stress-strain relationships have been derived from paired extensometer/piezometer installations, which provide only point source data. Because of the general unavailability of spatially detailed deformation data, areal stress-strain relations and their variability are not commonly considered in constraining conceptual and numerical models of aquifer systems. Interferometric synthetic aperture radar (InSAR) techniques can map ground displacements at a spatial scale of tens of meters over 100 km wide swaths. InSAR has been used previously to characterize larger magnitude, generally permanent aquifer system compaction and land subsidence at yearly and longer timescales, caused by sustained drawdown of ground-water levels that produces intergranular stresses consistently greater than the maximum historical stress. We present InSAR measurements of the typically small-magnitude, generally recoverable deformations of the Las Vegas Valley aquifer system occurring at seasonal timescales. From these we derive estimates of the elastic storage coefficient for the aquifer system at several locations in Las Vegas Valley. These high-resolution measurements offer great potential for future investigations into the mechanics of aquifer systems and the spatial heterogeneity of aquifer system structure and material properties as well as for monitoring ongoing aquifer system compaction and land subsidence.

Original languageEnglish (US)
Pages (from-to)1551-1566
Number of pages16
JournalWater Resources Research
Volume37
Issue number6
DOIs
StatePublished - 2001
Externally publishedYes

Fingerprint

synthetic aperture radar
radar interferometry
subsidence
Subsidence
Synthetic aperture radar
Aquifers
Interferometry
aquifers
valleys
aquifer
valley
compaction
Compaction
timescale
piezometers
interferometry
Radar measurement
stress-strain relationship
compressibility
Dilatometers

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Aquatic Science
  • Water Science and Technology

Cite this

Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar interferometry. / Hoffmann, Jörn; Zebker, Howard A.; Galloway, Devin L.; Amelung, Falk C.

In: Water Resources Research, Vol. 37, No. 6, 2001, p. 1551-1566.

Research output: Contribution to journalArticle

Hoffmann, Jörn ; Zebker, Howard A. ; Galloway, Devin L. ; Amelung, Falk C. / Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar interferometry. In: Water Resources Research. 2001 ; Vol. 37, No. 6. pp. 1551-1566.
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