EOSC 114 Study Guide - Final Guide: Shotcrete, Shear Strength, Mass Wasting
13 Apr 2017
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Landslide (a lot of material moving at once) = slide, mass movement, mass wasting. Human and economic impacts of landslides are governed by: population density lives and injuries, cost of infrastructure, population preparedness. A landslide closes the sea-to-sky highway (hwy 99) once every 10 years on average. Most fatalities are associated with the landslide trigger, not the landslide itself e. g. earthquakes, floods, volcanoes, etc. Bc has the highest frequency of landslides in canada ( slopes complicated geology and uplifted mountain range from plate tectonics). Return period on large landslides (>20 million m 3 of material) in the southern canadian cordillera (southern bc) = 25-70 years. Debris mixture of rock, earth, trees, water: type of movement. Slides cohesive block moves on a failure surface i. ii. Creep, soil flow, or earth flow (slow movement) f ) / shear stress ( Factor of safety (f s, ) = shear strength (
