Question

Large multipurpose dams also leads to land degradation explain

Answer 1

1 Irrigation has changed the cropping pattern of many regions with farmers shifting to water intensive crops.This has lead to the salinisation of the soil.
2 Regulating and damming of rivers affect the natural flow of rivers causing poor sediment flow.
3 The flood plains are deprived of silt.
4 Multipurpose projects induce pollution which leads to land degradation.

Answer 2

Large multipurpose dams leads to land degradation because first a large area of land should be cleared of by cutting down the trees for creating the dams. This leads to land degradation because the roots of the trees helps to hold tightly the particles of soil but when the trees are cut off they are unable to do so. Second, canals should also be made for the passage of water and that will be done by digging out the ground which will also result land degradation.