Types of Mass Movement:
Creep; Fall, Slip, Flow; Solifluction
; Rock Glaciers; Slumping (Earthflow); Mudflow (lahar); Debris Flow, Debris Slide, Debris Avalanche; Rockslide; Rockfall; Debris Fall.
What is the types of mass movement?
Mass movements can be divided into four main classes. These are
falls, slides, creeps and flows
. The classes are based on how quickly the rock and sediment moves and how much water. there is. Steep and unstable slopes are more likely to have a mass movement than gentle and stable slopes.
What are 4 causes of mass movement?
The causes of mass wasting include
an increased slope steepness, increased water, decreased vegetation and earthquakes
. One of the types of mass wasting that is an example of the slope failing is a slump. This is the sliding of coherent rock material along a curved surface.
What are the types of mass movement and their definition?
| Types Descriptions | Flows occur when soil or rock acts like a liquid | Slumps a slice of material that moves as one piece along a curved surface | Landslides made up of unconsolidated rock; includes rockslides and avalanches | Creeps material that moves slowly down gently sloping areas |
|---|
What are the 6 types of mass movement?
- Rockfall. Bits of rock fall off the cliff face, usually due to freeze-thaw weathering.
- Mudflow. Saturated soil (soil filled with water) flows down a slope.
- Landslide. Large blocks of rock slide downhill.
- Rotational slip. Saturated soil slumps down a curved surface.
Which mass movement is the fastest?
Landslides and avalanches
can move as fast as 200 to 300 km/hour. Figure 3. (a) Landslides are called rock slides by geologists. (b) A snow avalanche moves quickly down slope, burying everything in its path.
What are the main causes of mass movement?
Gravity
is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth’s surface, pulling everything in a direction toward the center of the Earth. On a flat surface, parallel to the Earth’s surface, the force of gravity acts downward.
How does mass movement affect humans?
As
human populations expand and occupy more and more of the land surface
, mass movement processes become more likely to affect humans. The table below shows some of the most deadly movement processes since 1900. In a typical year in the United States, landslides cause over $2 billion in damages and 25 to 50 deaths.
What is fall in mass movement?
The basic types of
landslide movement
are: Fall. This is generally characterized by rapid or extremely rapid rate of movement with the descent of material characterized by a freefall period. Falls are commonly triggered by earthquakes or erosion processes.
What is the slowest type of mass movement?
The slowest and least noticeable, but most widespread of the slow mass wasting categories is
creep
. Creep involves the entire hillside, and is characterized by very slow movement of soil or rock material over a period of several years.
Which type of mass wasting moves rapidly and can be fatal?
Which type of mass wasting moves rapidly and can be deadly? SELECT TWO. That’s right!
Flows (debris flows especially) and rock falls
can move very quickly, making them dangerous.
How do you control mass wasting?
Engineering solutions include barriers and retaining walls, drainage pipes, terracing the slope to reduce the steepness of the cuts, and immediate revegetation. Rockfalls can be controlled or eliminated by
the use of rock bolts, cables, and screens
and by cutting back slopes to lesser gradients.
What factors contribute to mass wasting?
Mass wasting is influenced by
slope, material strength, water content, and amount of vegetation
. Mass wasting can be triggered by storms, earthquakes, eruptions, and human activity. Fall, slide, flow, and creep are the main categories of mass wasting mechanisms.
What is another name for mass movement?
Mass movement, also called
Mass Wasting
, bulk movements of soil and rock debris down slopes in response to the pull of gravity, or the rapid or gradual sinking of the Earth’s ground surface in a predominantly vertical direction.
What is the mass movement of flow?
Mass wasting
, also known as slope movement or mass movement, is the geomorphic process by which soil, sand, regolith, and rock move downslope typically as a solid, continuous or discontinuous mass, largely under the force of gravity, frequently with characteristics of a flow as in debris flows and mudflows.
How do you manage mass movement?
Mass movement control must be primarily
preventive
: e.g., mapping vulnerable zones, drawing up a land use plan, banning building work or any modification of slopes, and protection in the form of coppice forests.
