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In Japan a large debris flow or landslide is called yamatsunami , literally mountain tsunami. Ancient debris flow deposit at Resting Springs Pass, California. Debris flows are accelerated downhill by gravity and tend to follow steep mountain channels that debouche onto alluvial fans or floodplains.
Landslides, also known as landslips, or rockslides, [3] [4] [5] are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. [6] Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from ...
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.
The risk of debris flow — a type of landslide that can cause severe damage — around recently burned areas in Los Angeles County is growing as this weekend's rains approach. There is now a 10% ...
A landslide, also called a landslip, [10] is a relatively rapid movement of a large mass of earth and rocks down a hill or a mountainside. Landslides can be further classified by the importance of water in the mass wasting process. In a narrow sense, landslides are rapid movement of large amounts of relatively dry debris down moderate to steep ...
These "purple zones" show areas where landslides, known in geology as "debris flows," are likely to start. The zones make up 13.3% of the mountainous counties in western North Carolina, which adds ...
At volcanoes, the term landslide is commonly used for slope movements with shear and displacement in a relatively narrow zone. [7] They can be in the form of debris avalanches, debris flows, slumps and rockfalls. [7] [8] A debris avalanche is a sudden, very rapid flow of rock and soil in response to gravity. It is a common middle stage in the ...
Haunting memories of past landslides. ... “There are mud and debris flow hazards that are existing even when it’s not raining,” Los Angeles County Public Works director Mark Pestrella said.