Surface deformation near the All American Canal due to groundwater extraction monitored with satellite remote sensing

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Surface deformation near the All American Canal
due to groundwater extraction monitored with
satellite remote sensing
Rick Forster Joo-Yup Han Desmond Moser Jorge
Ramirez
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All American Canal Seepage is supplying
groundwater pumped in the Mexicali Valley
ASTER image aboard NASAs Terra satellite on
August 21st 2002 (R band 3, G band 2, and B
band 1)
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(No Transcript)
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Lining section Pilot Knob Hydroelectric
Generation Station to Drop 3
ASTER image aboard NASAs Terra satellite on
August 21st 2002 (R band 3, G band 2, and B
band 1)
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Ground subsidence measured with Interferometric
Synthetic Aperture Radar (InSAR)
http//edc.usgs.gov/Tectonic/tectonics_main.htm
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Example interferogram (May 1996 to Dec. 1996)
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SAR data acquisitions from ERS-1 and ERS-2 used
to generate interferograms
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Processing flowchart for generation of
interferograms and deformation map
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A vertical displacement map derived from
the full stack of 30 interferograms (19922001)
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Images separated to test change detection of
subsidence maps
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Change in vertical displacement 1992/97
minus 1996/2001
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Details of subsidence changes
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East Mesa Geothermal Field changes in net
production
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Subsidence transects crossing the All American
and East Highline Canals
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Details of subsidence changes along the All
American Canal
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Subsidence changes along the East Highline Canal
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Conclusions and Future Research

• The traditional InSAR technique can measure mm/yr
  subsidence rates in the mesa areas surrounding
  the All American Canal, but not in the
  agricultural areas.
• There is no significant subsidence near the AAC
  due to agricultural pumping.
• The subsidence bowl from the EMGF extends to the
  ACC and EHC, but is not influential.
• Changes in subsidence rate are detectable with
  traditional InSAR
• A more recent InSAR technique, permanent
  scatterers (PSInSAR) can be used to measure
  subsidence in the agricultural area of the
  Mexicali Valley from groundwater seepage changes
  after the lining of the AAC

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Improved InSAR method of measuring subsidence
changes due to lining of the All American Canal