What is advantage and disadvantage of dam?
The buildup of water within the lake ensures that when required and also when water is released for electricity production, the energy can be stored. When used the electricity generated by the dams does not generate greenhouse gases and therefore does not cause pollution.
What are disadvantages of dam?
Large dams have junction rectifier to the extinction of the many fish and alternative aquatic species, huge losses of forest, the disappearance of birds in floodplains, erosion of deltas, wetland, and farmland, and many other irreversible impacts.
What is a dam and its purpose?
A dam is a structure built across a stream or river to hold water back. Dams can be used to store water, control flooding, and generate electricity.
What are the problems of dams?
Environmental Problems Caused By Dams
- (i) Soil Erosion: ADVERTISEMENTS:
- (ii) Species Extinction:
- (iii) Spread of Disease:
- (iv) Changes to Earth’s Rotation:
- (v) Sedimentation:
- (vi) Siltation:
- (vi) Water logging:
- (viii) Salinisation:
What are the impacts of dams on environment?
Greenhouse gases: The flooding of surrounding habitat around dams kills trees and other plant life that then decomposes and releases large amounts of carbon into the atmosphere. Because the river is no longer flowing freely, the water becomes stagnant and the bottom of the reservoir becomes becomes depleted of oxygen.
How can we reduce the impact of dams on the environment?
As a long-term measure, watershed management involving soil conservation and catchment restoration can reduce erosion and sediment inflow to the reservoir. Operational options, such as flushing, sluicing, dredging, and hydro suctioning can reduce sediment deposit in the reservoir.
What are the positive effects of dams?
- Power: Hydroelectric power is made when water passes through a dam.
- Irrigation: Dams and waterways store and provide water for irrigation so farmers can use the water for growing crops.
- Flood Control: Dams help in preventing floods.
- Drinking Water:
- Recreation:
- Transportation:
How do dams benefit the economy?
A dam and reservoir may support navigation, recreation, flood control, irrigation, and water supply, with each multipurpose benefit providing significant social and economic impacts on a local, regional, and national level. When federal dams are built, they are authorized by Congress to serve one or more functions.
How does hydropower impact the economy?
In years of ample runoff, hydropower plants produce extra energy. This is used to displace more expensive generation at fossil-fuel powerplants, which further helps to reduce consumers’ electricity bills. Revenue from power sales is also repaid to the U.S. Treasury.
What are the advantages of big dams?
Benefits Of Large Dams
- WATER FOR DRINKING AND INDUSTRIAL USE.
- IRRIGATION.
- FLOOD CONTROL.
- HYDRO POWER GENERATION.
- INLAND NAVIGATION.
- RECREATION.