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lecture15

Table of Contents

  1. Mass Movements: Landscapes in Motion
  2. Why study landslides?
  3. Why study landslides?
  4. Why study landslides?
  5. Why study landslides?
  6. Why study landslides?
  7. Why study landslides?
  8. Why study landslides?
  9. Why study landslides?
  10. Why study landslides?
  11. Why study landslides?
  12. Why study landslides?
  13. Why study landslides?
  14. 15.1 What are the characteristics of mass movements?
  15. 15.1 What are the characteristics of mass movements?
  16. 15.1 What are the characteristics of mass movements?
  17. 15.1 What are the characteristics of mass movements?
  18. 15.1 What are the characteristics of mass movements?
  19. 15.1 What are the characteristics of mass movements?
  20. 15.1 What are the characteristics of mass movements?
  21. 15.1 What are the characteristics of mass movements?
  22. 15.1 What are the characteristics of mass movements?
  23. 15.1 What are the characteristics of mass movements?
  24. 15.1 What are the characteristics of mass movements?
  25. 15.1 What are the characteristics of mass movements?
  26. 15.1 What are the characteristics of mass movements?
  27. 15.1 What are the characteristics of mass movements?
  28. 15.2 What causes mass movements?
  29. 15.2 What causes mass movements?
  30. 15.2 What causes mass movements?
  31. 15.2 What causes mass movements?
  32. 15.2 What causes mass movements?
  33. 15.2 What causes mass movements?
  34. 15.2 What causes mass movements?
  35. 15.3 What factors determine slope stability?
  36. 15.3 What factors determine slope stability?
  37. 15.3 What factors determine slope stability?
  38. 15.3 What factors determine slope stability?
  39. 15.3 What factors determine slope stability?
  40. 15.3 What factors determine slope stability?
  41. 15.3 What factors determine slope stability?
  42. 15.4 When do mass movements occur?
  43. 15.4 When do mass movements occur?
  44. 15.4 When do mass movements occur?
  45. 15.4 When do mass movements occur?
  46. 15.4 When do mass movements occur?
  47. 15.4 When do mass movements occur?
  48. 15.5 How do we know ... how to map mass-movement hazards?
  49. Mt. St. Helens
  50. 15.5 How do we know ... how to map mass-movement hazards?
  51. 15.5 How do we know ... how to map mass-movement hazards?
  52. 15.5 How do we know ... how to map mass-movement hazards?
  53. 15.5 How do we know ... how to map mass-movement hazards?
  54. 15.6 How do mass movements sculpt the landscape?
  55. Mass movement
  56. 15.6 How do mass movements sculpt the landscape?
  57. 15.6 How do mass movements sculpt the landscape?

Text and Images from Slide

Cohesion is illustrated by showing friction points on a bolder.

15.2 What causes mass movements?

Fig 15.13

Friction and cohesion are resisting forces to gravity. Friction is an opposing force when two surfaces are in contact that increases with the "roughness" of contacting surfaces. Friction also varies with slope angle, as it is a function of mass and gravity. Cohesion is an attractive force between particles at the atomic level. Loose sand or gravel have little cohesion, but clay particles, with charged surfaces, have high cohesion.

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