NCERT Solution for Class 10 Geography Chapter 3 Water Resources Questiona and Answer for CBSE, HBSE and some other state boards. Now Students can easily learn Class 10th geography with ccl chapter.
Class 10 Geography Chapter 3 Question Answer
Q.1. Choose the correct answer out of the four alternatives given below :
(i) Based on the information given below classify each of the situation as suffering from water scarcity and not suffering from water scarcity.
(a) Region with high annual rainfall
(b) Region having high annual rainfall and large population
(c) Region having high annual rainfall but water is highly polluted
(d)Region having low rainfall and low population.
Ans. Suffering from water scarcity : (c), (d)
Not suffering from water scarcity (a), (b)
(ii) A Which one of the following statements is not an argument in favour of multipurpose river projects ?
(a) Multipurpose projects bring water to those areas which suffer from water scarcity
(b) Multipurpose projects by regulating water flow helps to control floods.
(C) Multipurpose projects lead to large scale displacements and loss of livelihood
(d)-Multiple purpose projects generate electricity for our industries and our homes.
(iii) Here are some false statements. Identify the mistakes and rewrite them correctly.
(a) Multiplying urban centres with large and dense populations and urban lifestyles have helped in proper utilization of water resources.
(b) Regulating and damming of rivers does not affect the river’s natural flow and its sediment flow.
(c) In Gujarat, the Sabarmati basin farmers were not agitated when higher priority was given to water supply in urban areas, particularly during droughts.
(d) Today in Rajasthan, the practice of roof top rainwater water harvesting has gained popularity despite high water availability due to Rajasthan Canal.
(a) Multiplying urban centres with large and dense populations and urban life styles have added to water requirements.
(b) Regulating and damming of rivers affects the river’s natural flow and its sediments flow.
(c) In Gujarat, the Sabarmati basin farmers were agitated when higher priority was given to water supply in urban areas, particularly during droughts.
(d) Today in Rajasthan, the practice of roof top rain water harvesting is on the decline because of high water availability due to Rajasthan Canal.
Q. 2. Answer the following questions in about 30 words:
(i) Explain how water becomes a renewable resource ?
Ans. About 3/4th of earth’s surface is covered with water. But fresh water is a small proportion of it. It is obtained from the following sources :
(a) Surface run-off
(b) Ground water
This water is continually being renewed and recharged through Hydrological cycle, All water within a Hydrological cycle makes water a renewable resource.
(ii) What is water scarcity and what are its main causes ?
Ans. Scarcity. Despite abundant water, many areas have shortage of water. This is alled scarcity of water. In Rajasthan, women have to travel long distance to get drinking after after balancing matkas.
Scarcity of Water. According to Falken Mark, a Swedish Expert, water curs when water availability is less than 1000 m per person per day.
Causes of Scarcity-
(i) Low rainfall causes scarcity of water.
(ii) Water scarcity occurs in drought prone areas.
(iii) Variation in seasonal rainfall.
(iv) Over exploitation of water.
(v) Excessive use of water.
(vi) Unequal access to water.
(vii) Great demand due to growing population.
(iii) Compare the advantages and disadvantages of multipurpose river projects.
Ans. Many river valley projects have been started for the purpose of integrated economic social development of there basins.
|Advantages of multipurpose projects :||Disadvantages of multipurpose projects :|
|(i) Dams are built for irrigation.|
(ii) They generate electricity.
(iii) They provide water supply.
(iv) They help in industrial development.
(v) They control floods.
(vi) They help in recreation and navigation.
(vii) They help in fish breeding.
|(i) They affect the natural flow of rivers.|
(ii) This results in poor sediment flow and excessive sedimentation at the bottom of the reservoir.
(iii) It result in poorer habitats for aquatic life in the river.
(iv) They submerge the existing vegetation and lead to soil decomposition.
(v) It also causes a large-scale displacement of local communities.
Q. 3 Answer the following questions in about 120 words.
(i) Discuss how rain water harvesting in Semi-arid region of Rajasthan carried out ?
Ans. Rain water harvesting is a technique of increasing the recharge of ground water by capturing and storing rainwater. Many low cost techniques are used in semi arid areas like Rajasthan. In Bikaner, Phalodi and Barmer, underground tanks or tankar are used for storing drinking water. These are connected to the sloping roofs of the houses through a pipe. Rainwater is stored in tankas for three to five years. Rainwater or Palar Pani is considered the Purest form of natural water.
(ii) Describe how modern adaptation of traditional rain water harvesting methods are being carried out to conserve and store water ?
Ans. In ancient India, traditional methods were and for rain water harvesting. Roof top, rain water harvesting was commonly practised to store drinking water. People built diversion channels like Guls’ and ‘Kuls’ in Himalayas. Khadins in Jaisalmer and Johads in Rajasthan store rain water. Tankar’ were used for storing drinking water. Tankar was connected to the sloping roofs of the houses. Today, these methods were adopted to use modern methods of rainwater harvesting.