W6 Landslide by Ng

W6 Landslide by Ng - UGB 220E Natural Hazards Landslide...

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Landslide UGB 220E Natural Hazards
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Weathering reparation Preparation Physical and chemical weathering Slope processes Gravitational force is the underlying cause! Mass movement and particulate movement Role of humans
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h i l W th i Physical Weathering
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Chemical eathering Weathering
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Physical weathering on Mt. Whitney in background; chemical weathering on Alabama Hills in foreground
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Result of weathering: regolith and soil Figure 13.5
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Weathering & Slope Processes
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Mass Movement Classes
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Internal Causes of Landslides Inherent weak materials e.g. clay; loose sand, sedimentary rock Decreases in cohesion Expansion due to lifting from depths Adverse geological structures Ancient slip surface Expose of rock bedding to daylight at steeper slope eak rock structures Wea oc s uc u es
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External Causes of Landslides External causes of slope failures Steepening the slope Removing support from lower part of a slope Adding mass high on a slope
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Triggering Causes of Landslides riggers: e g heavy rains
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W6 Landslide by Ng - UGB 220E Natural Hazards Landslide...

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