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La Conchita landslide, photo taken 14 January 2005 La Conchita landslide, 1995. The town of La Conchita, California, experienced major landslides in 1995 and 2005. The latter landslide killed 10 people, and destroyed or damaged dozens of houses. The 2005 landslide occurred on part of a previous landslide that occurred in 1995.
USGS Image of debris flow from 1995 Landslide. The village of La Conchita is along a portion of the coast prone to mudslides, and sits beneath a geologically unstable formation. In 1909, a devastating mudslide occurred approximately one-half mile north of the town, and in 2005 slides closed Highway 101 in both directions, trapping residents.
Parts of Burbank and Sun Valley, previously affected by the La Tuna Fire in 2017, received four inches (100 mm) of rain and were evacuated ahead of potential mudslides. 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]
La Conchita, California, United States 2005 La Conchita landslide: 200,000 m 3: 10 Remobilization of colluvium from 1995 slide into a debris flow. [125] 17 Feb 2006 Southern Leyte, Philippines: 2006 Southern Leyte mudslide: 15 MCM 1,126 Rock-debris avalanche triggered by ten-day period of heavy rain [135] 3 Jun 2007
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 ...
Description: "Debris flow is a very rapid to extremely rapid flow of saturated non-plastic debris in a steep channel" (Hungr et al.,2001) Speed: very rapid to extremely rapid (>5 m/s) Type of slope: angle 20–45 degrees. Control factor: torrent sediments, water flows. Causes: High intensity rainfall
Debris flow channel with deposits left after 2010 storms in Ladakh, NW Indian Himalaya. Coarse bouldery levees form the channel sides. Poorly sorted rocks lie on the channel floor. Debris flow in Saint-Julien-Mont-Denis, France, July 2013 Scars formed by debris flow in Ventura, greater Los Angeles during the winter of 1983. The photograph was ...
A mudflow, also known as mudslide or mud flow, is a form of mass wasting involving fast-moving flow of debris and dirt that has become liquified by the addition of water. [1] Such flows can move at speeds ranging from 3 meters/minute to 5 meters/second. [ 2 ]