Merits and demerits of big and small Dams?
Answers
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1. Advantages :---
a) Irrigation
b) Electricity generation
c) Water supply for industrial and domestic purposes
d)Flood control
e) Amusement
f) Inland navigation
g) Fish breeding
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2. Disadvantage :---
a)Natural flow of river is affected causing poor flow of sediments
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
#Be Brainly
Some Advantages of Dams are:
1.Water Stored in dams are used for irrigation.
2.Generation of electricity from the water released through dams.
3.Renewable source of energy. Whenever electricity needed it can generated from the stored water.
4.No pollution occurs during generation of electricity. Clean source of energy.
5.Hydroelectricity produced by dams does not produce any waste product.
6.The hydroelectricity powerplants are long lasting and maintenance cost is low compared to others.
7.Flood control by holding water.
8.Supply of water to less rainfall areas.
9.Picnic spot (Boating) etc.
Some Disadvantages of Dams are:
1.The cost of construction is very high.
2.Sometimes takes dacades for construction of dams.
3.High standard materials are required to built dams.
4.Regular maintenance of dams is necessary.
5.Relocation of people living in the surrounding areas of dams. Hence loss of farms and land.
6.The flow of river water is disturbed and may disturb the habitat of wild life.
7.Risk of flood if dams break by earthquake.