Question: Name the river on which the Mettur dam is located.
Question: Name the river on which the Nagarjuna Sagar dam is located.
Question: Name the river on which the Rihand dam is located.
Question: Name the river on which the Bhakra Nangal dam is located. [CBSE 2014]
Question: Name the river on which the Koyna dam is located?
Question: Name the river on which the Sardar Sarovar dam is located.
Question: What is the contribution of hydroelectricity in the total generation of electricity.
Question: What is hydro-logical cycle? What is its importance?
Answer: The continuous movement of water on, above and below the surface of earth is known as hydro-logical cycle. The freshwater is mainly obtained from surface run off and ground water that is continually being renewed and recharged through the hydro-logical cycle. All water moves within the hydro-logical cycle ensuring that water is a renewable resource.
Question: How has agriculture aggravated the problem of water scarcity in India? Explain.
- Water is a basic input in agriculture. It is used for irrigation.
- HYV seeds needs more water as compared to traditional seeds.
- Commercialization of agriculture has also lead to withdrawal of groundwater at a large scale.
- Overuse of groundwater is another problem associated with agriculture. The water table has lowered in many parts of India due to its overuse.
Question: “Water scarcity may be an outcome of large and growing population”. Justify.
- A large population means more water not only for domestic use but also to produce more food.
- Most of the Indian cities are facing the problem of water due to growing population. .
- A growing population has also a direct impact on the water level.
Question: How does urbanization and urban lifestyle lead to over-exploitation of water resources? Explain.
- Most of our cities are over populated. Overpopulation leads to our utilisation of water resources.
- Urbanisation especially unplanned urbanisation adds to water pollution.
- Urbanisation also damages the existing water resources especially the river. For example, most of Indian river have been polluted by the waste of cities.
Question:Is it possible that an area or region may have ample water resources but is still facing water scarcity? Explain with the help of three relevant examples.
Answer: Yes it is possible that an area or region may have ample water resources but is still facing water scarcity. Most of our cities are facing this problem.
- In most of our cities there is no shortage of water but the water is unfit for consumption.
- Most of our cities are in the banks of rivers, but rivers have been turned into toxic streams.
- The ever increasing population, industries and vehicles has made matter worse by exerting pressure on existing freshwater resources.
Question: What is importance of water?
“Water is a very important and critical resource in India.” Support the statement by explaining any three points.
- Water is vital for human survival.
- Water is used for transportation.
- In industries water is used as a coolant.
- Water is also used for power production.
- Water is a basic input for agriculture.
Question: How do increasing number of industries exert pressure on existing freshwater resources?
- Industries used water as coolant, raw material, solvent, etc.
- Industries release harmful chemicals which contaminates water.
- Most of the Indian rivers are polluted due to toxic chemicals which are released by industries.
Question: What are dams? How do these help to conserve and manage water?
Answer: A dam is a barrier across flowing water that obstructs, directs or retards the flow often creating a reservoir, lake or impoundment.
- Dams were traditionally built to impound rivers and rainwater that could be used later to irrigate agricultural fields.
- Dams are also source of perennial canals.
Question:Distinguish between a dam and a multipurpose project.
- A dam is barrier across the flowing water that obstructs, dissects or retards the flow, often creating a reservoir, lake or an impoundment.
- It is a traditional concept.
- A multipurpose project is that which fulfils a variety of purposes at the same time, for example:- irrigation, generation of electricity, flood control, fish breeding, soil conservation, etc.
- It is a modern concept.