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A debris flow is a moving mass of loose mud, sand, soil, rock, water and air that travels down a slope under the influence of gravity. To be considered a debris flow, the moving material must be loose and capable of "flow," and at least 50% of the material must be sand-size particles or larger.
Debris flows are hazardous flows of rock, sediment and water that surge down mountain slopes and into adjacent valleys. Hydrologist Richard Iverson describes the nature of debris-flow research and explains how debris flow experiments are conducted at the USGS Debris Flow Flume, west of Eugene, Oregon.
Debris flows are geological phenomena in which water-laden masses of soil and fragmented rock rush down mountainsides, funnel into stream channels, entrain objects in their paths, and form thick, muddy deposits on valley floors.
A debris flow is a sediment flow with plastic rheology and laminar state from which deposition occurs through freezing en masse. The terms debris flow and mass flow are used interchangeably because each exhibit plastic flow behavior with shear stress distributed throughout the mass (Nardin et al., 1979).
A debris flow is a type of sediment gravity flow. It is a rapid mass movement of a concentrated mixture of sediment, organic matter, and water that can flow like a liquid yet can stop on sloping surfaces and form a nearly rigid deposit. Observed debris flows commonly have been likened to flowing masses of wet concrete.
1 de ene. de 2016 · Definition. Debris flow is an extremely rapid, flow-like mass movement, traveling in a steep, established channel and involving a saturated, unsorted mixture of granular soils, organics, and other debris (Hungr et al., 2001 ).
Earthflow, sheet or stream of soil and rock material saturated with water and flowing downslope under the pull of gravity; it represents the intermediate stage between creep and mudflow. Earthflows usually begin in a large basin on the upper part of a slope where debris and weathered material
