FARE 1300 Lecture Notes - Lecture 24: Debris Flow, Pyroclastic Flow, Mass Wasting

• School: University of Guelph
• Department: Food, Agricultural and Resource Economics
• Course: FARE 1300
• Professor: Andreas Boecker

Document Summary

Week 4 - feb 4 - mass wasting & landslides. Mass wasting (know for midterm) downslope movement of material landslides (rotational and translational) avalanches hazardous earthquakes, tsunamis, volcanoes pyroclastic flow debris flows lots of water how do we characterize different types. Mitigation avoid oversteepening, water management, slope support, debris reservoirs, retaining walls, fences, etc . Resisting strength gravity and weight of material (load) Friction, strength of the material, water content, clay content, packing grains. Angle of repose relationship between the granule size (a) and the moisture content (b) As the grain size increases, the angle of repose (aka the resting state) increases. As the moisture content increases, the angle of repose increases until saturation. Porosity (measure of the void spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0 and 100%) before and after.