What is landslides and its causes?

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. These landslides are called submarine landslides.

What is land slide Class 8?

A landslide is the movement of rock, earth, or debris down a sloped section of land. Landslides are caused by rain, earthquakes, volcanoes, or other factors that make the slope unstable. Geologists, scientists who study the physical formations of the Earth, sometimes describe landslides as one type of mass wasting.

What is landslide explain its causes effects and its disaster management?

A landslide occurs when part of a natural slope is unstable and unable to support its own weight. If a slippery material is present below soil then soil can become heavy with rainwater and prone to landslide. It is a downward or outward movement of soil, rock or vegetation due to gravitational force.

What are the causes of landslide Class 9?

Landslides may be caused by snowmelt, rainfall, water level changes, groundwater changes, stream flooding, volcanic activity, earthquakes, intrusion by human activities, or any combination of these causes, in slopes that are on the verge of movement.

What are landslides list out five major causes of landslides in India?

Important factors considered to be responsible for causing landslides are:

• Slope instability due to removal of lateral and underlying support.
• Indiscriminate chopping down of trees.
• Slash and burn cultivation practices in hills.
• Road construction and mining activities.

What is landslide state two main causes of landslide in Assam?

Landslide in Guwahati city is mainly caused due to interference of human by disturbing the surrounding environment. Due to rise in population, the area under forest cover has decreased, which has exposed the top surface to weathering.

What is land use Class 8?

The land is used for a variety of purposes such as agriculture, forestry, mining, home building, roads, and industry creation. This is commonly termed Land use.

How are landslides caused Class 8?

Landslides are caused due to earthquakes, floods and volcanoes. The roots of the trees and plants firmly hold on to the soil. Cutting down of forests loosens the soil. During heavy rainfall, since the soil is loosened, landslides are more prone to occur.

What are the effects of land slide?

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.

What are the causes of land slide and its remedial measures?

Decrease of material strength: It happens due to the weathering, pore water pressure and changes in structure. The incidents of landslides increasing day by day due to the over urbanisation, massive deforestation, construction and development work in landslide prone areas.

What are the causes of landslide Upsc?

Causes behind Landslides

• Earthquakes: They cause a sudden shaking of earth’s crust which creates stress on materials, thus leading to landslides.
• Heavy Rainfall: The occurrence of heavy or continuous rainfall may lead to heavy landslides in the areas of steep slopes.

What is a landslide and what causes it?

A landslide refers to any form of mass wasting characterized by movement of rocks, soil, or other debris downhill assisted by gravity. The result is wearing off of the earth’s surface.

How do you model a landslide?

In this science activity you will model landslides using a clipboard and pennies, and investigate how friction and the angle of a hill’s slope affects potential landslides. 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.

What are Falls Falls and landslides?

Falls are sudden movements of loads of soil, debris, and rock that break away from slopes and cliffs. Falls landslides occur as a result of mechanical weathering, earthquakes, and force of gravity.

What are the geologic conditions that facilitate landsliding?

Areal studies — some embracing entire countries — have shown that certain geologic conditions on slopes facilitate landsliding; these conditions include intensely sheared rocks; poorly consolidated, fine-grained clastic rocks; hard fractured rocks underlain by less resistant rocks; or loose accumulations of fine-grained surface debris.