ERTH 2415 Lecture Notes - Lecture 17: Landslide, Earthflow, Frank Slide
23 Nov 2016
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Erth 2415 lecture 17: mass movements ii. Classificiation of mass movements : slides . Rotational slides: slide in which failure occurs on an over steepened slope, along a concave rupture surface. This is due to natural factors and multiple blocks often fail: flows . Flow: a mass movement involving continuous internal deformation of the moving material. The main difference between slides and flows is that flows has material that is thoroughly deformed during movement whereas slides has little deformation. Creep: creep: gradual, slow movement of earth and debris downhill. A creep is assisted by the alternating seasons. Soils rich in clays have a greater tendency to experience this because of the expansion and contracting behavior of clays. Rock, debris or earth flow: rock, debris, or earth flow: mixture of rock fragments, soil and water flowing downslope as a viscous fluid. It is generally confined to pre-existing channels and is usually related to high water content.
