Dynamics of Debris Flows and Rock Avalanches

"Outdoor observations reveal the importance of the volume and composition of soil and rocks and the resulting three-dimensional shape." This is a lecture given at the University of Missouri Kansas City on April 14, 2005 It is a reference to. The guest speaker was Dr. Richard Iverson from USGS of Vancouver, Washington. This is a very nice, detailed lecture that includes a powerful feature of video clips and his information. He showed me a lot of photographs of calculated stress components and total vertical acceleration.

• Quickly transport mixtures of earth, rock and vegetation along moderate to steep slopes and show debris flow, avalanche, or flow. It is usually caused by heavy rain and 3 depends on their moisture content and mobility. The debris slip is the most dry while debris flow is most wet

Debris Flow: Debris Flow is a form of rapid mass movement that moves loose soil, rocks, organic matter, air, water and mixes down a hill downhill. Fragment flow contains less than 50% fine grains. Debris flow is usually caused by a strong surface flow. It is caused by intense precipitation and rapid melting of snow. And it erodes and mobilizes rocks on loose soil or steep slope. Debris flow also occurs frequently from other types of landslides that occur on steep slopes, are nearly saturated, and are made up of most of the sized material like mud and sand. Debris flow source regions are usually associated with steeply sloping grooves, and debris flow deposits usually appear as debris alluvial fans in the grooves. Fire destroying vegetation slopes exacerbates the susceptibility of slopes to debris flow

The first type of large waste is falling rocks or avalanches. Rock rocks are numerous rocks that form irregular rocky mountains on the bottom of the slope, called cliffs when falling off the slopes and cliffs. Rock falls are large movements of fast moving dry. Avalanche is also called debris avalanches, falling rocks, but also includes soil and other debris. Like a falling rock, avalancens will soon move, but due to the presence of earth and debris, they are sometimes moist than rock falls.