Search results
Results from the WOW.Com Content Network
Debris flows in forested regions can contain large quantities of woody debris such as logs and tree stumps. Sediment-rich water floods with solid concentrations ranging from about 10 to 40% behave somewhat differently from debris flows and are known as hyperconcentrated floods. [3] Normal stream flows contain even lower concentrations of sediment.
However, also dry debris can exhibit flow-like movement. [30] Flowing debris or mud may pick up trees, houses and cars, and block bridges and rivers causing flooding along its path. This phenomenon is particularly hazardous in alpine areas, where narrow gorges and steep valleys are conducive of faster flows. Debris and mud flows may initiate on ...
Mass wasting, also known as mass movement, [1] is a general term for the movement of rock or soil down slopes under the force of gravity. It differs from other processes of erosion in that the debris transported by mass wasting is not entrained in a moving medium, such as water, wind, or ice.
A lahar (/ ˈ l ɑː h ɑːr /, from Javanese: ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water. The material flows down from a volcano, typically along a river valley. [1] Lahars are often extremely destructive and deadly; they can flow tens of metres per second ...
Debris flows can develop at recent burn scars during or immediately after a heavy rainfall event. The dangers of these quickly developing and often swift landslides are well-known, but the ...
Commonly called mudslides, these dangerous torrents are usually referred to by geologists and first responders as debris flows, which the U.S. Geological Survey describes as fast-moving landslides ...
Debris flow channel scoured out by the passage of a debris flow. A flow is a spatially continuous movement in which surfaces of shear are short-lived, closely spaced, and usually not preserved. The distribution of velocities in the displacing mass resembles that in a viscous liquid.
A debris flow into a residential area of Sun Valley damaged 40 to 45 homes and carried a vehicle that struck a natural gas pipeline, which began to leak. [37] Mandatory evacuations were ordered for nearby areas of the San Fernando Valley affected by the Creek Fire before the storm, but no major damage was reported. [38] [39]