GLG 112 1st Edition Lecture 38Outline of Last Lecture1. Floodplain Regulationa. Flood insuranceb. Floodplain useIV. Flagstaff FloodingOutline of Current Lecture I. Introduction to Mass WastingA. What is it?B. When does it happen?C. Where does it happen?II. TriggersCurrent LectureMass wasting is the downslope movement of earth material.It happens when the driving forces (pulling the material down the slope) overcome the resisting forces (holding the material on the slope).Mass wasting can happen anywhere. Example: Oso landslide in Washington was the deadliest inUS history.Triggers:1. excess water2. oversteepened slopes - loose material angle of repose: maximum angle that loose material will sustain when piled up. These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.The bigger the material, the bigger angle of repose.- BedrockPreexisting planes of weakness slide down when water gets in. - Earthquakes - Added weight- Vegetation Less vegetation in an area means a landslide has happened in the past and will likely happen again. Plants will not grow in oversaturated areas for
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