What are the different types of downslope movement?
What are the different types of downslope movement?
Creep is the slow downslope movement of material under gravity….Creep
- seasonal movement or creep within the soil – due to seasonal changes in soil moisture and temperature, e.g. frost heave processes.
- continuous creep – where the soil and rock debris isn’t strong enough to resist gravity.
What are mass movements classified by?
15.2 Classification of Mass Wasting
| Failure Type | Type of Material |
|---|---|
| Creep or solifluction | Soil or other overburden; in some cases, mixed with ice |
| Slump | Thick deposits (m to 10s of m) of unconsolidated sediment |
| Mudflow | Loose sediment with a significant component of silt and clay |
| Debris flow | Sand, gravel, and larger fragments |
What are the different types of movement in a landslide?
TYPES OF LANDSLIDES. The term “landslide” describes a wide variety of processes that result in the downward and outward movement of slope-forming materials including rock, soil, artificial fill, or a combination of these. The materials may move by falling, toppling, sliding, spreading, or flowing.
What is downslope movement?
Downslope movement of rock or soil by the force. of gravity is one of the most common ways by which the surface of the Earth is shaped over time. These mass movements may be very rapid or imperceptibly slow.
How are sediment flows classified?
The rheology of a sediment gravity flow in its depositional phase is determined by three parameters: (I) the flow is either laminar or turbu- lent; (II) the concentration of the flow is either low or high; (III) the flow behavior is either fluidal (cohesionless) or plastic (cohesive).
What is the downslope movement of unconsolidated material on a curved slip surface?
A slump is a downward and outward movement of rock or unconsolidated material moving as a unit or series of units. Large blocks of material move suddenly downward and outward along a curved plane. Rockslides are the most catastrophic type of landslide.
What are the three criteria used to classify the different types of mass wasting?
15.2 Classification of Mass Wasting
- There are three criteria used to classify slope failures:
- The type of material that failed (e.g., bedrock or unconsolidated sediment),
- The mechanism of the failure (how the material moved as it failed), and.
- The rate of movement (how quickly the material moved).
What are the different types of landslides describe the different types of landslides according to the varnes classification?
The five kinematically distinct types of movement are described in the sequence fall, topple, slide, spread and flow. Combining the two terms gives classifications such as Rock fall, Rock topple, Debris slide, Debris flow, Earth slide, Earth spread etc. Varnes, D. J. 1978.
Which of the following is a landslide characterized by short distance movement down a slope?
slump
A slump is a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or a rock layer moves a short distance down a slope. Movement is characterized by sliding along a concave-upward or planar surface.
What factor is responsible for the downslope movement of soil and rock?
force of gravity
Mass Movements. Mass movements (also called mass-wasting) is the down-slope movement of Regolith (loose uncemented mixture of soil and rock particles that covers the Earth’s surface) by the force of gravity without the aid of a transporting medium such as water, ice, or wind.
How do rocks and soil move downslope?
Mass movement is an erosional process that moves rocks and sediments downslope due to the force of gravity. The material is transported from higher elevations to lower elevations where other transporting agents like streams or glaciers can pick it up and move to even lower elevations.
When a block of material moves downslope along a curved surface the type of mass movement is?
Slump – involves movement along a curved surface, the upper part moving downward while the lower part moves outward.
How are mass wasting events classified?
Mass-wasting events are classified by their type of movement and material, and they share common morphological surface features. The most common types of mass-wasting events are rockfalls, slides, flows, and creep. Mass-wasting movement ranges from slow to dangerously rapid.
What is the classification of mass wasting?
5.2 Classification of Mass Wasting
| Failure type | Type of material |
|---|---|
| Creep or solifluction | Soil or other overburden, in some cases mixed with ice |
| Slump | Thick deposits (m to 10s of m) of unconsolidated sediment |
| Mud flow | Loose sediment with a significant component of silt and clay |
| Debris flow | Sand, gravel and larger fragments |
What are the types of movements considering slope movement classification by Vernes?
The five kinematically distinct types of movement are described in the sequence: – fall, – topple, – slide, – spread, – flow.
Which of the following is landslide characterized by short distance movement down a slope sliding along concave upward or planar surface?
When unconsolidated material moves downslope by following?
1. Debris Flow (Debris Avalanche): unconsolidated material (usually larger in size) moves rapidly downslope tumbling, mixing with air and/or water. A “river” of unconsolidated material.
Which of the following refers to the downslope movement of rock soil and ice due to gravity?
Mass wasting is the movement of rock and soil down slope under the influence of gravity. Rock falls, slumps, and debris flows are all examples of mass wasting. Often lubricated by rainfall or agitated by seismic activity, these events may occur very rapidly and move as a flow.
Is the downslope movement of a coherent block of earth material?
Definition: mass wasting refers to a downslope movement of rock or soil as a more or less coherent mass.
What are the two classification of mass weathering?
The most common mass-wasting types are falls, rotational and translational slides, flows, and creep. Falls are abrupt rock movements that detach from steep slopes or cliffs.
What are the different types of landslide according to Varnes classification system?
What are the two general categories that classify slope remediation measures *?
5.1 Introduction. Properly designed slope protection and stabilization has to include two components: a vegetational-biological and a mechanical-structural component. For maximum effect, both components must be integrally planned prior to road construction.
Where rotational movement of soil is accompanied by downslope movement the feature that is observed is a?
A landslide is a downslope movement of rock or soil, or both, occurring on the surface of rupture—either curved (rotational slide) or planar (translational slide) rupture—in which much of the material often moves as a coherent or semicoherent mass with little internal deformation.