Landslides. GEOL 4093 Risk Assessment. Resources. landslides.usgs.gov Murck, Skinner, and Porter, 1997. Dangerous Earth: An Introduction to Geologic Hazards , John Wiley & Sons, 300 p. Bloom, 1998. Geomorphology: A Systematic Analysis of Late Cenozoic Landforms , Prentice Hall,482 p.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
GEOL 4093 Risk Assessment
The empty can on the left slides on a dry surface when the angle reaches about 17 degrees. With a little water dripping thgough a small hole in the bottom of the can on the right, sliding will occur at a much lower angle
Angle of repose is the natural steepnees of a pile of unconsolidated material. It varies depending on grain size, grain shape, and water content.
One way to classify mass movements is by speed of movement and by composition—slurry flows versus granular flows.
Dipping beds, jointed rock
Mudflows from 1980 eruption of Mount St. Helens reached speeds as high as 40 m/s and traveled as far as the Columbia river, ovee 90 km away.
A 1963 landslide into the Vaiont Reservoir, Italy, caused a giant wave to overflow the dam
The 1920 Grand Banks earthquake caused a submarine landslide that broke underwater telegraph cables and disrupted communications between North America and Eurpoe. It also proved the existence of turbidity currents.
Landslide susceptibility map and recommended land use for Congress Springs area near San Francisco