Landslide Classification

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Presentation transcript:

Landslide Classification Lecture 26 Landslide Classification

● 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)

Classification of Mass Movements Material

Classification of Mass Movements Material Nature of motion

Classification of Mass Movements Material Nature of motion Velocity

Classification of Mass Movements

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

Classification of Mass Movements: Rock Falls

Classification of Mass Movements: Rock Slides

Classification of Mass Movements: Rock Slides

7. Classification of Mass Movements: Rock Avalanches

Classification of Mass Movements: Rock Avalanche

● 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

Classification of Mass Movements: Creep

Classification of Mass Movements: Creep

Classification of Mass Movements: Earthflow

Classification of Mass Movements: Earthflow

Classification of Mass Movements: Debris Flow

Classification of Mass Movements: Debris Flow

Classification of Mass Movements: Mud Flow

Classification of Mass Movements: Mud Flow

Classification of Mass Movements: Debris Avalanche

Hummocks

Classification of Mass Movements: Debris Avalanche

Classification of Mass Movements: Debris Avalanche

Classification of Mass Movements: Slump

Classification of Mass Movements: Debris Slide

Classification of Mass Movements: Debris Slide

Classification by Sharpe (1938) vs Varnes (1978)

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

Tully landslide, April 27, 1993

Debris Flow Mudslide Rockslide http://www.youtube.com/watch?v=8mKC3eID074 Mudslide https://www.youtube.com/watch?v=n1cCs-S5EKc Rockslide http://www.youtube.com/watch?v=sAd8tE_rZ7g&feature=fvsr

Flows http://www.youtube.com/watch?v=8mKC3eID074&feature=related

Liquifaction http://www.youtube.com/watch?v=5yMYxwtvIQE http://www.youtube.com/watch?v=-X9-4tWpMCo

Slides and slumps

La Conchita, California March 4, 1995

January 10, 2005

Landslide anatomy

State of activity