PLAN341 Lecture Notes - Lecture 4: Slope Stability, Shear Stress, Mass Wasting
25 Sep 2017
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Document Summary
Rivers have major effects on form of landscape, What are the dynamics of that environment, precipitation rates, hydrological cycle which influences erosion rates. Development on top of or side of slope, if there"s critical areas of slope instability, really catastrophic. Disturbance of stable slopes resulting in failure. Because of the slope or angle, remove vegetation, remove ability for slope to hold back materials, so materials start to move down slope. Mass wasting, large amounts of materials are destabilized and fall down the slope. Massive thunderstorms on slopes and all of a sudden you get hyper critical flows of sediments moving down those slopes. Contour maps (connect points of equal elevation) Land uses have slope limitations (cropland <18%, expressways around 4%) Disturbance of stable slope may result in failure, accelerated erosion, etc. Maximum angle a material can be safely inclined before failure. Diff types of materials have diff angle of repose. Well grained sand, b/w 30 and 35 degree angle.
