What is landslide in geology?
A landslide is a mass movement of material, such as rock, earth or debris, down a slope. They can happen suddenly or more slowly over long periods of time. When the force of gravity acting on a slope exceeds the resisting forces of a slope, the slope will fail and a landslide occurs.
What is landslide PDF?
A landslide occurs when stability conditions of the slope is disturbed either by the increase. of stress imposed on the slope and / or by the decrease in strength of the earth material. building up the slope and it involves enmass downward movement of earth material under. the influence of gravity.
What is landslide process?
A landslide is any geologic process in which gravity causes rock, soil, artificial fill or a combination of the three to move down a slope. Several things can trigger landslides, including the slow weathering of rocks as well as soil erosion, earthquakes and volcanic activity.
What are the two types of landslides?
movements are included in the general term “landslide,” the more restrictive use of the term refers only to mass movements, where there is a distinct zone of weakness that separates the slide material from more stable underlying material. The two major types of slides are rotational slides and translational slides.
What is landslide and its types?
The term “landslide” encompasses five modes of slope movement: falls, topples, slides, spreads, and flows. These are further subdivided by the type of geologic material (bedrock, debris, or earth). Debris flows (commonly referred to as mudflows or mudslides) and rock falls are examples of common landslide types.
What are the three types of landslides?
Landslides in bedrock
- Rock falls. Single and small rock falls from cliffs build up to form aprons of scree or talus, sometimes developing over long time periods.
- Rock slope failures. This group of landslides varies greatly in features.
- Rotational landslides.
- Debris flows.
- Creep.
- Solifluction.
- Translational slides.
What are effects of landslides?
The impact of a landslide can be extensive, including loss of life, destruction of infrastructure, damage to land and loss of natural resources. Landslide material can also block rivers and increase the risk of floods.
How does a landslide start?
Landslides occur when masses of rock, earth, or debris move down a slope. Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris. Mudslides usually start on steep slopes and can be activated by natural disasters.
What are the 5 types of landslides?