Landslides and InSar

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Landslides and InSar

• How Interferometric Synthetic Aperture Radar
  works and is used to study Landslides

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InSAR
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• 5.66 cm C-band InSAR

• 23.53 cm L-band InSAR

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When Insar is Used

• Detection of landslides
• Monitoring existing landslides
• Analysis and prediction of slope failures
• Examination of small scale instabilities

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InterferogramsSaint-Étienee-de-Tinée landslideA
Case Study
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3 day interval August 23-26 Deformation Fringe
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2.83 cm(half a wavelength)
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9 days intervals C August 20-29 D August
26-September 04 Independent Images
Used Similar Images constant velocity
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Modeling

• 2 different sliding models
• Rotational Slips
• Translational Slips

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Modeling Example
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Caveats

• InSar detection of lanslides can be constrained
  by
• - Rough Terrain
• - Rainy Weather
• - Vegetation

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References

• Campbell, B.A. 2002. Radar Remote Sensing of
  Planetary Surfaces. Cambridge University Press.
  United Kingdom.
• Fruneau, B., Achache, J., and C. Delacourt.
  1996. Observation and modeling of the
  Saint-Etienee-de-Tinee landslide using SAR
  interferometry. Tectonophysics. 265 181-190.
• Mantovani, F., Soeters, R., and C.J. Van Westen.
  1996. Remote sensing techniques for landslide
  studies and hazard zonation in Europe.
  Geomorphology. 15 213 225.
• Refice, A., Bovenga, F., Wasowski, J., and L.
  Guerriero. 2000. Use of InSar data for landslide
  monitoring a case study from southern Italy.
  IEEE. 2504-2506.
• USGS 2006. Using Satellites to Monitor
  Deformation Radar Interferometry.
  http//volcanoes.usgs.gov/insar/more_insar.html.V
  iewed on 10/21/06.