How the construction of big dams cause economic and environmental pollution????
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Answers
How do dams cause erosion?
One of the first problems with dams is the erosion of land. Dams hold back the sediment load normally found in a river flow, depriving the downstream of this. In order to make up for the sediments, the downstream water erodes its channels and banks. ... One of the reason dams are built is to prevent flooding.
Heyy mate here is your answer.....
The construction of large dams completely change the relationship of water and land, destroying the existing ecosystem balance, which in many cases, has taken thousands of years to create. Currently there are around 40,000 large dams which abstract the World’s rivers, completing changing their circulation system this is not going to occur without dire environmental impacts.
Throughout the past few years, the negative impacts of dams have become so well known that most countries (including India) have stopped building them altogether and are now forced to invest their money into fixing the problems created by existing dams.
Some environmental problems caused by dams are as follow:
1:soil erosion.
2: species extinction
3:spread of disease
4:changes to earth rotation.
5:sedimentation
6:siltation
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