Q2 of 28 Page 175

Describe the main causes of landslides?

The main causes of landslides are as follows:-

A) Natural Causes:


Climate- A change in climate has an impact on soil stability. If the soil is loosely bounded then by a heavy precipitation, it may result in a landslide.


Earthquakes- Earthquakes in young fold mountains loosen the rocks and the steep becomes more.


Weathering and Erosion- Weathering is brought about by chemical action of air, water, plants and bacteria. Erosion is the wearing away of soil particles by water and air currents, which leads to destruction of land and increase in landslide


B) Human Causes:


Mining- Blasting of mines hugely increases the chances of landslide.


Deforestation- As trees are cut down, the firm grip on the soil particles decreases resulting in a landslide.


Construction- The construction of roads, bridges, tunnels, dams promotes landslides.


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