Question: What Are Advantages And Disadvantages Of Dams?

What are the advantages of dams Class 10?

1.

Large Dams ensure storage of water for irrigation purposes and also for generating electricity.

2.

Canals leading from these dams transfer large amount of water over long distances and help in supplying water to far off villages for irrigation and for used by people for drinking bathing and other use..

What are the harmful effects of large dams?

Large dams have led to the extinction of many fish and other aquatic species, the disappearance of birds in floodplains, huge losses of forest, wetland and farmland, erosion of coastal deltas, and many other unmitigable impacts.

What are the disadvantages of the Hoover Dam?

There were also significant downsides to the project: Over 100 construction workers were killed, and the Dam had a large impact on the Colorado River, flooding wildlife habitats and changing its natural flow of the Colorado. Stevens notes this would not pass today’s environmental impact assessments.

Why are some dams being removed?

Why Are Some Dams Being Removed? There has been a growing movement to remove dams where the costs – including environmental, safety, and socio-cultural impacts – outweigh the benefits – including hydropower, flood control, irrigation, or recreation – or where the dam no longer serves any useful purpose.

What are the advantages of a dam?

Benefits of Dams. Dams provide a range of economic, environmental, and social benefits, including recreation, flood control, water supply, hydroelectric power, waste management, river navigation, and wildlife habitat. Dams provide prime recreational facilities throughout the United States.

Why dams should not be built?

Dams Kill Fish: Dams block the migration of fish, deplete rivers of oxygen, and interfere with the biological triggers that guide fish. They also reduce the ability of rivers to clean themselves.

What DAM means?

/dæm/ a wall built across a river to stop the flow and collect the water, esp. to make a reservoir (= an artificial lake) that provides water for an area or can be used to make electricity. dam. verb [ T ]

Why do we build a dam?

Dam, structure built across a stream, a river, or an estuary to retain water. Dams are built to provide water for human consumption, for irrigating arid and semiarid lands, or for use in industrial processes. … Dams can also provide a lake for recreational activities such as swimming, boating, and fishing.

Are dams good?

Key Words: Dam, environment, ecology, water resources. … Dams have a great deal of positive and negative effects on the environment be- sides their benefits like controlling stream regimes, consequently preventing floods, obtaining domestic and irrigation water from the stored water and generating en- ergy.

What are the advantages and disadvantages of dams Class 10?

1}These are the main source of power generation. 2}These projects control the floods because water can be stored in them. These projects have converted many, ‘rivers of sorrows’ into ‘rivers of boon’. 3}Thes projects are the main source of irrigation and also help in conserving soil.

What is a dam and its purpose?

A dam is a barrier that stops or restricts the flow of water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability.

What are the disadvantages of a dam?

DisadvantagesDams are very expensive to build.Creating a reservoir can flood existing settlements.Eroded material is deposited in the reservoir and not along the rivers natural course so farmland downstream can be less fertile.

What are the disadvantages of dams Class 10?

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.

Is building a dam desirable or dangerous?

Yes, building dam is dangerous as it causes earthquake.