FARE 1300 Lecture Notes - Lecture 25: Pyroclastic Flow, Downhill Creep, Debris Flow

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

Document Summary

Midterm (30% week 7, march 3, in-class 7-9) *** what is the difference b/w a rational landslide, translational landslide, and a debris flow (describe material, water content, and velocity) ** Assignment 1: (15%, due week 5, feb 11) Debris flow (lots of water, saturated like a river) Diff. types (tectonic setting: moisture, velocity, material: size and amount) Falls and topples ( material is rock, dry no moisture, high velocity) Soil creep (velocity= low, slope moves down, slow, solifuction,) Friction, strength of the material, water content, clay content, packing grains. Grain side increases, angle of repose increases until saturation. Falls mass detach from steep slope along surface with little or no shear displacement, descends mostly through the air by free fall, bouncing or rolling. Rational landslide: material rotates around a curved failure plate, concave. Sliding outwards and downwards on one or more concave-upward failure surface. Translational (planar): failure plane is parallel to slope.