Dynamics of SlowMoving Landslides from Permanent Scatterer Analysis

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Dynamics of Slow-Moving Landslides from Permanent
Scatterer Analysis

• Authors George E. Hilley, Roland Bürgmann,
  Alessandro Ferretti, Fabrizio Novali, Fabio Rocca
• Presented by Karen R. Carroll

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Research Location

• http//homepages.udayton.edu/koziolam/courses/bay
  areatrip

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InSAR
Look Direction
http//edc.usgs.gov/Tectonic/InSAR.gif
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Network of Permanent Scatterers

• Buildings
• Dams
• Pylons
• Rocks

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InSAR Measurements
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Change in Movement Over Time
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Coulomb Failure Function (CFF)

t shear force m friction coefficient s
normal force r pore fluid pressure
Slope Failure CFF 0
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Profile of Middle Slide
Change in slope near Hayward Fault
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Conclusions

• Three large land movements were seen in the
  Berkeley area
• InSAR showed land movements of 5-7 mm/yr
• Corrected values show sliding of 27-38 mm/yr
• El Niño years affect the movement of slow-moving
  landslides
• Precipitation and landslides have a non-linear
  relationship
• Seasonal variations in landslide movement are can
  be seen using the InSAR-PS method