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A region experiences frequent landslides from heavy rains. How can the local residents lower the frequency of landslides in the region? Choose all that apply.

AStart contour plowing on the slopes where landslides happen.
BPlant vegetation on the slopes that experience landsides.
CEncourage deforestation in the regions that haven’t suffered landslides.
DDivert water so it flows into the affected region.
EReduce the slopes where landslides occur.

Verified Answer :

Correct answer: A). Start contour plowing on the slopes where landslides happen, and  B). Plant vegetation on the slopes that experience landsides.

A landslide is the movement of  rock, debris or the earth down the slope. It is the down- slope movement of the  rock and  the soil under the influence of gravity, which huge damage to life and property on the earth.

In order to lower the frequency of land slide the local resident must try to reduce the loss of soil in order to prevent soil erosion.

So, the best method out of these would be contour plowing and plant vegetation on the slope.

Answer:

Options (A), (B) and (D)

Explanation:

Landslide is usually defined as the downward motion of materials such as rocks, debris, and soil particles, under the influence of gravity. This situation occurs when the value of shear stress is higher than the shear strength of the slope and it often leads to a catastrophic situation.

In order to reduce the occurrence of a landslide, the following precautions can be taken-

  • The slope area must be planted with plants and trees, which will hold water in its roots, thereby helps in the reduction of landslide.
  • The drainage system in the hilly areas must be made in such a way that the rainwater is diverted into an unaffected region.
  • Landslide can also be reduced by adapting contour plowing (terrace cultivation) which helps in the holding of water and thereby controls the occurrence of landslides.

Thus, the correct answers are options (A), (B) and (D).

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