1. Landslide Classification
Lecture 26
Landslide Classification

2. ● Three characteristics used ● nature of material
Classification of Mass Movements
● Three characteristics used
● nature of material
(rock or unconsolidated)
● velocity of movement
(slow, moderate, or fast)
● nature of movement
(flow, slide, or fall)

3. Classification
of Mass
Movements
Material

4. Classification
of Mass
Movements
Material
Nature of
motion

5. Classification
of Mass
Movements
Material
Nature of
motion
Velocity

6. Classification of Mass Movements

8. ● Rock mass movements ● rock falls ● rock slides ● rock avalanches
Classification of Mass Movements
● Rock mass movements
● rock falls
● rock slides
● rock avalanches

9. Classification of Mass Movements:
Rock Falls

10. Classification of Mass Movements:
Rock Slides

11. Classification
of Mass
Movements:
Rock Slides

12. 7. Classification of Mass Movements:
Rock Avalanches

13. Classification of Mass Movements:
Rock Avalanche

14. ● Unconsolidated mass movements ● creep ● earthflow ● debris flow
Classification of Mass Movements
● Unconsolidated mass movements
● creep
● earthflow
● debris flow
● mud flow
● debris avalanche
● slump
● debris slide

15. Classification of Mass Movements:
Creep

16. Classification of Mass Movements:
Creep

17. Classification of Mass Movements:
Earthflow

18. Classification
of Mass
Movements:
Earthflow

19. Classification of Mass Movements:
Debris Flow

20. Classification of Mass Movements:
Debris Flow

21. Classification of Mass Movements:
Mud Flow

22. Classification of Mass Movements:
Mud Flow

23. Classification of Mass Movements:
Debris Avalanche

24. Hummocks

25. Classification of Mass Movements:
Debris Avalanche

26. Classification of Mass Movements:
Debris Avalanche

27. Classification of Mass Movements:
Slump

28. Classification of Mass Movements:
Debris Slide

29. Classification
of Mass
Movements:
Debris Slide

30. Classification by Sharpe (1938) vs Varnes (1978)

31. >100 km/year
<1 cm/year 0%
~40%

33. Tully landslide, April 27, 1993

34. Debris Flow Mudslide Rockslide
Mudslide
Rockslide

36. Flows

37. Liquifaction http://www.youtube.com/watch?v=5yMYxwtvIQE

38. Slides and slumps

39. La Conchita,
California
March 4, 1995

40. January 10, 2005

44. Landslide anatomy

45. State of activity