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en.wikipedia.org/wiki/Debris_flow

Debris flows are accelerated downhill by gravity and tend to follow steep mountain channels that debouche onto alluvial fans or floodplains.The front, or 'head' of a debris-flow surge often contains an abundance of coarse material such as boulders and logs that impart a great deal of friction.Trailing behind the high-friction flow head is a lower-friction, mostly liquefied flow body that ....

geology.com/articles/debris-flow

Debris Flow Definition. 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.

www.ready.gov/landslides-debris-flow

Debris and mud flows are rivers of rock, earth, and other debris saturated with water. They develop when water rapidly accumulates in the ground, during heavy rainfall or rapid snowmelt, changing the earth into a flowing river of mud or “slurry.” They can flow rapidly, striking with little or no warning at avalanche speeds. ...

phys.org/news/2016-09-debris.html

Debris flows, by contrast, are made up of "loose" particles that move independently within the flow. Similarly, mud flows are composed of mud and water, whereas debris flows are made up larger ...

www.youtube.com/watch?v=_yCnQuILmsM

Massive debris flow / flash flood in Southern Utah. Close to 3" of rain fell north of my location and I filmed these shots 6+ hours after the fact. Sharing this video.

en.wikipedia.org/wiki/2018_Southern_California_mudflows

The debris flows were up to 15 feet (5 m) in height of mud, boulders and tree branches, moving at estimated speeds of up to 20 miles per hour (30 km/h) into the lower areas of Montecito.

www.universetoday.com/75745/debris-flow

Debris flows, by contrast, are made up of “loose” particles that move independently within the flow. Similarly, mud flows are composed of mud and water, whereas debris flows are made up larger ...

www.youtube.com/watch?v=8mKC3eID074

Debris flow video courtesy of Sue Cannon, landslide researcher with the US Geological Survey in Denver, Colorado. This video was taken by a television crew from Denver next to Interstate 70 near ...

geology.com/usgs/debris-flow-hazards

Debris Flow Hazards in the United States Republished from United States Geological Survey Fact Sheet 176-97. Debris flow in Oregon: This debris flow occurred in the Columbia River gorge near the town of Dodson, Oregon, during a rainfall and snowmelt event in February 1996 (Photo Inset: S. Cannon, USGS).

www.noozhawk.com/article/socal_edison_lawsuit_blame_for...

In the early morning hours on Jan. 9, 2018, mud and debris flows in Montecito claimed the lives of 23 people, damaged or destroyed hundreds of homes, and forced widespread evacuations.