Question

negative impact of dams in a form of paragraph ​

Answer 1

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Damming of rivers and regulating their flow result in excessive sedimentation at the bottom of the reservoir. This may hamper aquatic life and their migration to other water bodies. Building of dams result in the submergence of land and vegetation. This results in the decomposition of vegetation.

Answer 2

Answer:

1. Dams alter ecosystems Water is life — and since dams block water, that impacts life downstream, both for ecosystems and people.

2. Dams reduce biodiversity and cause extinction Aquatic species, particularly fish, are vulnerable to the impacts of dams.

3. Dams contribute to climate change (and are affected by it)As reservoirs fill, upstream forests are flooded, eliminating their function as carbon sinks. As the drowned vegetation decomposes, decaying plants in manmade reservoirs release methane, a powerful greenhouse gas.

4. Dams reduce water quality Manmade reservoirs trap fertilizers that run into the water from surrounding land. In addition, in some developing countries, sewage flows directly into the reservoirs.

5. Dams waste water Since more surface area of the water gets exposed to the sun, reservoirs result in much more evaporation than the natural flow of the river before that dam existed.