Tuesday , January 28 2020
Water

Water resources: 10th CBSE Geography

Question: Name the river on which the Mettur dam is located.

Answer: Kaveri

Question: Name the river on which the Nagarjuna Sagar dam is located.

Answer: Tungabhadra

Question: Name the river on which the Rihand dam is located.

Answer: Son

Question: Name the river on which the Bhakra Nangal dam is located. [CBSE 2014]

Answer: Satluj

Question: Name the river on which the Koyna dam is located?

Answer: Krishna

Question: Name the river on which the Sardar Sarovar dam is located.

Answer: Narmada

Question: What is the contribution of hydroelectricity in the total generation of electricity.

Answer: 22%

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.

Answer:

  1. Water is a basic input in agriculture. It is used for irrigation.
  2. HYV seeds needs more water as compared to traditional seeds.
  3. Commercialization of agriculture has also lead to withdrawal of groundwater at a large scale.
  4. 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.

Answer:

  1. A large population means more water not only for domestic use but also to produce more food.
  2. Most of the Indian cities are facing the problem of water due to growing population. .
  3. 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.

Answer:

  1. Most of our cities are over populated. Overpopulation leads to our utilisation of water resources.
  2. Urbanisation especially unplanned urbanisation adds to water pollution.
  3. 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.

  1. In most of our cities there is no shortage of water but the water is unfit for consumption.
  2. Most of our cities are in the banks of rivers, but rivers have been turned into toxic streams.
  3. The ever increasing population, industries and vehicles has made matter worse by exerting pressure on existing freshwater resources.

Question: What is importance of water?
Or
“Water is a very important and critical resource in India.” Support the statement by explaining any three points.

Answer:

  1. Water is vital for human survival.
  2. Water is used for transportation.
  3. In industries water is used as a coolant.
  4. Water is also used for power production.
  5. Water is a basic input for agriculture.

Question: How do increasing number of industries exert pressure on existing freshwater resources?

Answer:

  1. Industries used water as coolant, raw material, solvent, etc.
  2. Industries release harmful chemicals which contaminates water.
  3. 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.

  1. Dams were traditionally built to impound rivers and rainwater that could be used later to irrigate agricultural fields.
  2. Dams are also source of perennial canals.

Question:Distinguish between a dam and a multipurpose project.

Answer: Dam

  1. A dam is barrier across the flowing water that obstructs, dissects or retards the flow, often creating a reservoir, lake or an impoundment.
  2. It is a traditional concept.

Multipurpose project:

  1. 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.
  2. It is a modern concept.

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