ERTH 2415 Lecture Notes - Lecture 17: Landslide, Frank Slide, Earthflow
8 Feb 2019
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Document Summary
Recall that mass movements are geographical hazards that get their energy from gravity. Be able to describe the different types of mass movements. Be aware of several mitigation strategies against mass movement. In the last lecture we only covered falls, and translational slides. Now, we will cover rotational slides, flows, and subsides. Are slides which failure occures on an oversteepend slope, along a concave rupture surface. Due to natural factors (i. e: wave erosion) or human activity (i. e: road cuts) Are mass movements involving continuous internal deformation of the moving material. Main difference between slides and flows are: Slides: little deformation within the actual moving material. Flows: material is thoroughly deformed during movement, are less deeply seated. Flows can either be slow or fast. Gradual , slow movement of earth and debris downhill. Fast flows rock, debris, or earth flow. Mixture of rock fragments, soil, and water flowing downslope as a viscous fluid.
