Question

mention any three advantages and disadvantages of multipurpose river project

Answer 1

Answer :-

The various advantages and disadvantages of multipurpose river projects can be compared as follows:

Advantages

Disadvantages

a.  Irrigation

b.  Electricity generation

c. Water supply for industrial and domestic purposes

d. Flood control

e.  Amusement

f.  Inland navigation

g.  Fish breeding

a. Natural flow of river is affected causing poor flow of sediments also

b. Excessive sedimentation of the reservoir

c. Stream beds become rockier

d. Dam fragments a river thus making it difficult for aquatic fauna to migrate, and for spawning

e. Reservoirs submerge the existing vegetation and soil leading to its decomposition over time.

f. Deforestation and displacement of local people.

Answer 2

Multipurpose river valley projects are projects that serve several purposes like water for agriculture and industries ,generate hydropower,drinking water ,flood control ,navigation and tourism. main advantages are ; water for irrigation.
Disadvantages of Multipurpose Project
1. High Cost : The initial cost of building the dams is very high. It requires a lot of capital and engineering skills and modern machinery which is not available in India.
2. Adverse Impact on Environment : A vast variety of flora and fauna as well as human settlements get submerged in the water of reservoir formed by the dam.
3. Adverse effect on the fertility of the soil : Due to construction of dams there are no annual floods in the river. And because of this the soil of the down stream region does not get nutrient rich “silt”. This decreases the fertility of the soil.
4. Adverse Impact on aquatic life : Due to construction of dam on the river, the fish in the down stream area do not get sufficient nutrient material.
5. Non-availability of water throughout the year : Most of the rivers in India flow only for few months. So water is not sufficient to build a dam.