Question

shortly explain landslides

Answer 1

A landslide is the movement of rock, debris or earth down a slope. They result from the failure of the materials which make up the hill slope and are driven by the force of gravity. Landslides are known also as landslips, slumps or slope failure.Some of the most common types of landslide in Australia are earth slides, rock falls and debris flows. The movement of landslide material can vary from abrupt collapses to slow gradual slides and at rates which range from almost undetectable to extremely rapid. Sudden and rapid events are the most dangerous because of a lack of warning and the speed at which material can travel down the slope as well as the force of its resulting impact. Extremely slow landslides might move only millimetres or centimetres a year and can be active over many years. Although this type of landslide is not a threat to people they can cause considerable damage to property.

Answer 2

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LandSlide➫ A mass of rock and earth moving suddenly & quickly down a steep slope.

♦ Water availability, quantity and quality can be affected by landslide.

♦ It caused when earthquakes occur on areas with steep slopes, many times the soil slips.


➧ Causes of Landslides:-
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❱ Heavy Rain
❱ Soil Erosion
❱ Earthquakes
❱ Deforestation
❱ Volcanic Activity

➧ Effects of Landslides:-
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❱ It cause serious damage to property.

❱ Destruction of infrastructure.

❱ Damage to land and loss of natural resources.

❱ It also block rivers and increase the risk of floods.

➧ Types of Landslide:-
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[1] Rock Slides:-

❱ A landslide involving bedrock in which the rock that moves remains largely intact for at least a portion of the movement.

[2] Earth Slides:-

❱ A Soil Flow landslide where the majority of the soil materials are fine-grained & cohesive.


➧ Precautions of Landslides:-
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❱ Stay away from the slide area.

❱ Stay alert and awake.

❱ If you are in areas susceptible to landslides consider leaving if it is safe to do so.

❱ Listen to local radio or television stations for the latest emergency information.

➧ Prevention of Landslides:-
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❱ Directing surface water sources away from the landslides.

❱ Draining ground water streams away from the landslides.

❱ Minimizing irrigation on the surface of the soil.

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