EARTHSC 2GG3 Lecture Notes - Lecture 12: Avalanche
8 Oct 2013
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Document Summary
Landslides as a result of torrential rains are classified as geophysical movement. Landslides are a good example that shows there is an interconnection between natural disasters. Only 1% or 2% of landslides start by themselves. When the slope will fail depends on: slope steepness, material weight (different results if weight is larger than if is smaller, moisture content (water can change the structure of the landslide) Slope failure: the relationship between steepness and weight. Human activity is the main cause of landslides. Increasing the angle increases the chance of sliding movement downward. Material is taken away from the bottom (undercut) Can sometimes get this type of landslide naturally (rainfall, etc. ) 60% of this type of landslide happens in tropical areas (the natural ones) Anthropogenic landslides happen everywhere in the world (caused by humans) Can recognize ancient areas of downslope movements by boulders. Nevados huascaran is one of highest mountains in peru.
