Dams are important because they provide
water for domestic, industry and irrigation purposes
. Dams often also provide hydroelectric power production and river navigation. Domestic use includes everyday activities such as water for drinking, cooking, bathing, washing, and lawn and garden watering.
What is dam built on Class 4?
What is a dam built on? Ans. A dam is
a structure built across a river or stream
.
What are the uses of dams?
- Water Supply. Water stored in reservoirs of the dam is used to provide adequate amounts of quality freshwater to residential, industrial facilities and mining sites. …
- Irrigation.
- Electrical Generation. …
- Flood Control.
- Water Storage. …
- Mine Tailings. …
- Debris Control. …
- Navigation.
What are 3 benefits of a dam?
- WATER FOR DRINKING AND INDUSTRIAL USE.
- IRRIGATION.
- FLOOD CONTROL.
- HYDRO POWER GENERATION.
- INLAND NAVIGATION.
- RECREATION.
Are dams good or bad?
Dams can create a reservoir to hold water, protect areas from floods, or generate clean electricity. … But wait, there’s more: A dam also
physically
blocks migrating fish and changes the overall biology of the life in the river by changing the natural water flow.
What are the positive effects of dams?
- Hydroelectric power is made when water passes through a dam. …
- Dams and waterways store and provide water for irrigation so farmers can use the water for growing crops. …
- Dams help in preventing floods. …
- Since the water stored in dams is fresh water, it can then be used for drinking water in nearby towns and cities.
Why should we store water Answer Class 4?
Answer: All the water we get comes from the rain. … If we do not store water, we will not have enough water for our needs. That is why ,we should store and save water,
water must be used economically
.
What is the biggest dam in the world?
World’s Tallest Dam
Currently, the tallest dam in the world is
Nurek Dam on the Vakhsh River in Tajikistan
. It is 984 feet (300 meters) tall. Hoover Dam is 726.4 feet (221.3 meters) tall.
What is the most famous dam in the world?
Hoover Dam
is one of the most iconic dams around the world, stretching between the American states of Nevada and Arizona.
What is dam and its importance?
Dams are
built to provide water for human consumption
, for irrigating arid and semiarid lands, or for use in industrial processes. … Many dams are built for more than one purpose; for example, water in a single reservoir can be used for fishing, to generate hydroelectric power, and to support an irrigation system.
How do dams help the economy?
Among water infrastructure options, dams especially have been ascribed an unparalleled importance in fostering long-term economic development, because they
facilitate multiple uses of water
, including for productive activities (e.g. irrigation, in- dustrial production, low-cost cooling of power plants).
How do dams work?
A conventional dam
holds water in a
man-made lake, or reservoir, behind it. When water is released through the dam, it spins a turbine connected to a generator that produces electricity. The water returns to the river on the downstream side of the dam.
Do we need dams?
Dams are important because
they provide water for domestic, industry and irrigation purposes
. Dams often also provide hydroelectric power production and river navigation. … Dams and their reservoirs provide recreation areas for fishing and boating. They help people by reducing or preventing floods.
Why is dam bad?
These off-channel dams share many of the environmental drawbacks associated with traditional dams: they
may block fish migration
, harm water quality and temperature, flood valuable riparian and terrestrial wildlife habitat, strain a river basin’s overall water budget, and reduce or alter river flows.
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.
What are three main problems from dams?
- (i) Soil Erosion:
- (ii) Species Extinction:
- (iii) Spread of Disease:
- (iv) Changes to Earth’s Rotation:
- (v) Sedimentation:
- (vi) Siltation:
- (vi) Water logging:
- (viii) Salinisation:
