EARTHSC 2GG3 Lecture Notes - Lecture 8: Saguenay River, Spoil Tip, Frank Slide
16 Jun 2016
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1971: saguenay river, quebec: 27-hectare landslide, 26 homes lost, 31 killed. 1903 frank slide, alberta: buried town of frank, killed 70 people, lasted 90 sec. May 10m 2010 st. jude, quebec: landslide claimed lived of a family of 4. 1966 aberfan, wales: coil spoil heap failed, killed 144, predominantly school children, landslide kill thousands each year-often related to heavy rains, due to heavy rain. Forces on slopes: driving force move rock or sediment down a slope the weight of slope material is the largest driving force. Can include fill material and buildings resisting force oppose downslope movement. (greater than then the driving force: shear strength of material. Factors of safety may increase or decrease: forces on slope are determined by, types of material, slope angle and topography, climate, vegetation, water time. *planes of weakness: occur in bedding planes, foliation planes in metamorphic rocks, joints, or zones along which earth have moved before. (spot on the landscape/plane of weakness)
