EOSC 114 Lecture Notes - Lecture 11: Shear Stress, North American Cordillera, Geohazard

• School: UBC
• Department: Earth and Ocean Sciences
• Course: EOSC 114
• Professor: John Sherman

Document Summary

Human and economic impacts of landslides are broadly governed by: population density (lives and injuries, cost of infrastructure (5338$, population preparedness (both) Reported yearly landslide fatalities are a low number 1000s or so. Most fatalities associated with landslide trigger (earthquakes, floods, volcanoes) We want to live deaths & injuries. We want to own property that doesn"t get destroyed economy & building. Return period on large landslides (> 20million m3 of material) Classified by: type of material, type of movement, rate of movement. Name is usually the combination of 1 and 2: type of material. Debris (mixture of rock, earth, trees, water, and whatever was on the slope: type of motion, falls. Occur on very steep slopes (usually rock) Very fast: slides cohesive block moves on failure surface. Material moves as coherent mass along a surface of failure (either curved or straight: curved/bowl shaped failure surface. Rotation of material on a curved failure plane.