What is dam explain?
A dam is a barrier that stops or restricts the flow of surface 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 is a dam Class 10?
A dam is a barrier across flowing water that obstructs, directs or retards the flow, often creating a reservoir, lake or impoundment. Based on structure or material used, dams are classified as timber dams, embankment dams or masonry dams, with several sub-types.
What are 3 benefits of a dam?
- 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:
Is Dam a good idea?
Overview. Dams have been built with the intention to improve human quality of life by diverting water for power, navigation, and flood control, but have also resulted in human health concerns and environmental problems. Dams benefit people by providing usable, reliable water sources.
How long will a dam last?
The average lifespan of a dam is often estimated to be 50 years. (6) Another water policy expert (7) estimates that, on average, between 0.5% and 1% of a reservoir is filled by sediment each year, meaning that most dams would have a lifespan of 100-200 years.
Does dam make water toxic?
Due to environmental impacts of dams such as: – dams block up flowing bodies of water, such as rivers, any animals that depend on the flow to reproduce or as part of their life cycle are put in danger. – Harm water quality and temperature.
What is dam advantages and disadvantages?
Advantages of dams With the assistance of hydroelectricity or hydroelectric power, electricity is generated at a steady rate. For the use of another time, water is preserved. When used the electricity generated by the dams does not generate greenhouse gases and therefore does not cause pollution.
What are the problems caused by dams?
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. This lowering of the riverbed threatens vegetation and river wildlife.
What are the dangers of constructing big dams?
(iii) Construction of dams have resulted in problems like excessive sedimentation and salinity, waterlogging, sudden floods, soil erosion, large scale deforestation, extinction of species, health hazards, displacement of local communities and loss of livelihood of tribal communities.