EOSC 114 Lecture Notes - Lecture 2: Downhill Creep, Debris Flow, Silt
16 Oct 2017
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Document Summary
A variety of factors play a role, and each contribute to increasing shear stress and/or lowering shear strength. Western canada"s mountainous terrain leads to higher shear stress which drives down the fs. Furthermore, complex geology (see schematic in figure la. 49),the abundance of unconsolidated glacial sediments sitting on top of bedrock, and high precipitation are factors in lowering shear strength. People heighten landslide natural disasters by: developing on steeper slopes. This is usually a response to overpopulation, overcrowding, and a lack of space. Sometimes the most scenic and sought-after real estate are cliff-side lots with views of the ocean. These are more susceptible to landslides as a result of coastal erosion and the undercutting of sea-side cliffs: removing vegetation. Refer to the section on slope stability and anthropogenic activity in lesson 2 for this and the next two activities below: excavation and slope loading, altering water drainage, altering climate.
