JAC Board Class 10th Social Science Solutions Geography Chapter 3 Water Resources
JAC Class 10th Geography Resource and Development Textbook Questions and Answers
Question 1.
Choose the right answer from the four alternatives given below.
(i) Based on the information given below classify each of the situation as ‘suffering from water scarcity’ or ‘not suffering from water scar
(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.
Answer:
(a) Not suffering,
(b) Not suffering
(c) suffering
(d) Not suffering
(ii) Which one of the following statements is not an argument in favour of multipurpose river projects?
(a) Multi-purpose projects bring water to those areas which suffer from water scarcity.
(b) Multi-purpose projects by regulating water flow helps to control Hoods.
(c) Multi-purpose projects lead to large scale’displacements and loss of livelihood.
(d) Multi-purpose projects generate electricity for our industries and our homes.
Answer:
Multi-purpose projects lead to large scale displacements and loss of livelihood.
(iii) Here are some false statements. Identify the mistakes and rewrite them correctly.
(a) Multiplying urban centres with large and dense population and urban lifestyles have helped in proper utilisation 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 drought.
(d) Today in Rajasthan, the practice of rooftop rainwater water harvesting has gained popularity despite high water availability due to the Indira Gandhi Canal.
Answer:
(a) Multiplying urban centres with large and dense population and urban lifestyles have caused the over exploitation of water resources.
(b) Regulating and damming of rivers affect their natural flow and causes the sediment to settle at the bottom of the reservoir.
(c) In Gujarat, the Sabarmati basin farmers were agitated when higher priority was given to water supply in urban areas, particularly during drought.
(d) Today in Rajasthan, the practice of rooftop rainwater harvesting is on the decline due to the Rajasthan canal.
Question 2.
Answer the following questions in about 30 words.
(a) Explain how water becomes a renewable resource.
(b) What is water scarcity and what are its main causes?
(c) Compare the advantages and disadvantages of multi-purpose river projects.
Answer:
(a) The freshwater is continually being renewed and recharged through the hydrological cycle. All water moves within the hydrological cycle ensuring that water is a renewable resources.
(b) The cause of water scarcity in most cases is due to over-exploitation, excessive use and unequal access to water among different social groups.
| Advantages | Disadvantages |
| (i) Generates electricity. | (i) Results in displacement of local communication. |
| (ii) Helps in controlling floods. | (ii) Regulating and damming of rivers affect natural flow. |
| (iii) They supply water in water deficit areas. | (iii) Dams fragment rivers making it difficult for aquatic fauna to migrate. |
| (iv) Dams were thought as the vehicle for development of the nation, floods. | (iv) The rich industrialists or few urban centres have only benefitted from such projects, rivers affect natural flow. |
Question 3.
Answer the following questions in about 120 words.
(a) Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out.
(b) Describe how modern adaptations of traditional rainwater harvesting methods are being carried out to conserve and store water.
Answer:
(a) In Bikaner, Phalodi and Barmer, Rajasthan, people had a well-structured rooftop rainwater harvesting system which were connected underground. tarikser tankas for storing drinking water, also called ‘Palar Pani’. This water was used during the dry season when there was scarcity of water.
(b) Tamil Nadu is the first state to make rooftop rainwater harvesting compulsory to all houses across the state. There are legal provisions to punish the defaulters. Shillong in Meghalaya, with acute water shortage practises rooftop rainwater harvesting. Shillong 200-year old bamboo drip irrigation system is followed for irrigating plants.