GG231 Lecture Notes - Lecture 5: Debris Flow, Earthquake, Slope Stability
Document Summary
Alberta are similar in the fact that they were very unexpected and were not triggered by an earthquake. Landslide processes: there are three general types of movement of material on slopes and cliffs. Moves through the air and lands at base of slope. Dry process triggered by vibration, human or natural or wedging ice or vegetation. Rapid process a hazard to those underneath: slide. Movement in contact with the underlying surface along a plane surface. Identified by: character of surface of plane, type of material rock, sediment, water content, speed of movement. Examples: rockslide, translational slide slump, slip: flow. Flows are plastic or liquid movement, in water or sometimes air. Mass breaks up and flows during movement. Types include: solifluction, mudflow, debris flow, debris and snow avalanche: stability and failure, landslides are mainly a result of a change in the forces on the slope. These are referred to as driving and resisting forces: the factor of safety.
