LANDSLIDES. Thorp Landslide 1970 What Causes Landslides? Weak substrate Weathering of material ...

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LANDSLIDES
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Transcript of LANDSLIDES. Thorp Landslide 1970 What Causes Landslides? Weak substrate Weathering of material ...

  • Slide 1
  • LANDSLIDES
  • Slide 2
  • Thorp Landslide 1970
  • Slide 3
  • What Causes Landslides? Weak substrate Weathering of material Jointed and/or sheared substrates Discontinuity in the outcrop Contrast between the stability and permeability of layers of material Tectonics Volcanism Glacial rebound Water/glacial erosion at the toe or lateral margins Deep or underlying erosion of materials Depositional loading of the slope Removal of vegetation Freeze-thaw processes Shrink-swell processes Geological CausesMorphological Causes
  • Slide 4
  • Human Causes Slope excavation Slope loading Deforestation Irrigation Mining Artificial vibrations Water leakage from pipes (utilities)
  • Slide 5
  • Parts of a Landslide
  • Slide 6
  • Types of Landslides
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  • Slide 8
  • Slide 9
  • What variables trigger landslides? What variables can we control/test?
  • Slide 10
  • Design Your Experiment What is your question? Do background research Construct a hypothesis Test your hypothesis by doing an experiment Record and analyze your data and draw a conclusion/summarize Communicate your results
  • Slide 11
  • Landslide Lab Materials 1 clear container Earth materials: Sand Soil Gravel Snow (optional) Twigs, grass, etc. for vegetation cover 1 Graduated cylinder 1 Watering can or spray bottle 1 Protractor (to measure slope angle) 1 Scale 1 Stopwatch
  • Slide 12