What are the factors that pose a high risk to landslide?
Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.
What is the meaning of landslide?
Landslide, also called landslip, the movement downslope of a mass of rock, debris, earth, or soil (soil being a mixture of earth and debris). Landslides occur when gravitational and other types of shear stresses within a slope exceed the shear strength (resistance to shearing) of the materials that form the slope.
What is landslide PPT?
1. PRESENTED BY:- ABHIMANYU SINGH BHATI. Definition A landslide, also known as a landslip, is a geological phenomenon that includes a wide range of ground movements, such as rock falls, deep failure of slopes and shallow debris flows. Landslides can occur in offshore, coastal and onshore environments.
What are the different types of landslide according to Varnes classification system?
The five kinematically distinct types of movement are described in the sequence: – fall, – topple, – slide, – spread, – flow.
What is landslide management?
If you live in a high risk area an evacuation plan should be prepared. Plant trees and other types of vegetation that would help to stabilize soil on the slopes of your property. Look for changes to your surroundings that may signal the likelihood of landslide activity, such as leaning fences or walls.
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 the most common kind of landslides?
Rock falls, disrupted rock slides, and disrupted slides of earth and debris are the most abundant types of earthquake-induced landslides, whereas earth flows, debris flows, and avalanches of rock, earth, or debris typically transport material the farthest.
Why do you think we Cannot classify landslides?
The kind of movement and its speed, the volume of the material and the possible premonitory signs depend on just these factors. It is for this reason that it is difficult to classify the different types of landslides and even harder to try and foresee and prevent them.
How do landslides affect the environment?
Landslides can overwhelm, and even pollute streams and waterbodies with excess sediment. In extreme cases they can dam streams and rivers, impacting both water quality and fish habitat. Landslides can wipe out large tracts of forest, destroy wildlife habitat, and remove productive soils from slopes.