NCERT Class 10 Social Science Chapter 8 Water Resources Solutions to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 10 Social Science Chapter 8 Water Resources and select need one. NCERT Class 10 Social Science Chapter 8 Water Resources Question Answers Download PDF. NCERT Social Science Class 10 Solutions.
NCERT Class 10 Social Science Chapter 8 Water Resources
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. NCERT Class 10 Social Science Chapter 8 Water Resources Solutions are part of All Subject Solutions. Here we have given NCERT Class 10 Social Science Chapter 8 Water Resources Notes, NCERT Class 10 Social Science Textbook for All Chapters, You can practice these here.
Water Resources
Chapter – 8
CONTEMPORARY INDIA – II (GEOGRAPHY)
TEXT BOOK QUESTIONS
Q. 1. Multiple choice questions:
(i) Based on the information given below classify each of the situations as ‘suffering from water scarcity’ or ‘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.
Answer: Not suffering from water scarcity:
(a) Region with high annual rainfall.
(d) Region having low rainfall and low population.
Suffering from water scarcity:
(b) Region with high annual rainfall and large population.
(c) Region having high annual rainfall but water is highly polluted.
(ii) Which one of the following statements is not an argument in favor of multi- purpose river projects?
(a) Multipurpose projects bring water to those areas which suffer from water scarcity.
(b) Multipurpose projects by regulating water-flow helps control floods.
(c) Multi-purpose projects lead to large scale displacements and loss of livelihood.
(d) Multipurpose projects generate electricity for our industries and our homes.
Answer: (c) Multipurpose 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 centers 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 rooftop rainwater harvesting has gained popularity despite high water availability due to the Rajasthan Canal.
Answer: (a) Multiplying urban centers with large and dense populations and urban lifestyles have not helped in proper utilization of water resources.
(b) Regulating and damming of rivers affects the river’s natural flow and its sediment 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 western Rajasthan, the practice of roof top rain water harvesting is on decline as plenty of water is available due to the Rajasthan Canal.
Q. 2. Answer the following questions in about 30 words:
(i) Explain how water becomes a renewable resource.
Answer: Water becomes a renewable resource through a hydrological process or cycle comprising evaporation, condensation and precipitation. During the process of evaporation, the impurities are left over the lithosphere and water is distilled.
(ii) What is water scarcity and what are the main causes?
Or
What is meant by water scarcity? Explain any two of its main causes.
Answer: Water scarcity means water shortages in low rainfall areas or drought prone areas.
Causes: Water scarcity is caused due to overuse, misuse, use of pesticides, emissions of pollutants from industries, lack of proper management, lack of water treatment plants, mass ignorance and careless attitude, location- setting, landforms and change in climate.
(iii) Compare the advantages and disadvantages of multipurpose river projects.
Or
Explain any three disadvantages of multipurpose projects.
Or
Explain any three advantages and disadvantages of each of the multipurpose river valley projects.
Answer: I. Advantages of multipurpose river projects:
(i) Such projects help in checking floods.
(ii) Ample water is available for irrigation.
(iii) These projects help in electricity generation.
(iv) Water of these projects is used for domestic supply and industrial uses.
(v) Generally, surrounding areas of these projects are developed into tourist and picnic spots.
(vi) These are used for inland navigation and fish-breeding.
II. Disadvantages of multipurpose river projects:
(i) Displacement of people: In the process of construction of a dam, people living in a large area are evicted and displaced.
(ii) Loss to land: Land near a dam suffers from seepage, water-logging and immersion conditions.
(iii) Loss of lives and property: A slight cleft or rift in the wall of a dam may result in inundation of vast areas around and loss of human lives and property.
(iv) Loss to vegetation and soil: A dam submerges the existing vegetation in the vast region around it. Soil erosion, landslides and a rupture is formed in the parental rock.
Q. 3. Answer the following questions in about 120 words:
(i) Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out.
Answer: Rainwater Harvesting in Rajasthan: 1. In the semi-arid and arid regions of Rajasthan, particularly in Bikaner, Phalodi and Barmer, almost all houses traditionally have underground tanks or tank for storing drinking water.
2. The tanks are as large as a big room; one household in Phalodi has a tank measuring 6.1 meters deep, 4.27 meters long and 2.44 meters wide. The tankas are parts of the well-developed rooftop rainwater harvesting system and are built inside the main house or the courtyard.
3. Sloping roofs of the homes are connected through pipes. The rain water falling on the rooftops would travel down the pipes and thus, stored in these underground ‘tankas’.
4. The first spell of rain is usually not collected as this would clean the roofs and the pipes but the rainwater from the subsequent showers is collected by people there.
(ii) Describe how modern adaptations of traditional rainwater harvesting methods are being carried out to conserve and store water.
Or
Describe any three traditional methods of rainwater harvesting adopted in different parts of India.
Answer: Modern adaptations of traditional rainwater harvesting methods are being carried out in many parts of the country to conserve and store water.
Examples are as follow:
1. Roof-top rainwater harvesting through construction of underground tanks in main house or in the courtyard. Tanks are generally 6.1 meters deep, 4.27 meters long and 2.44 meters wide. Rain-water from the roof is connected to a pipe that carries it to the underground tank. It is being practiced in Shillong, (Meghalaya), Rajasthan (Bikaner, Phalodi and Barmer districts).
2. In Gendathur of Mysore district in Karnataka, about 200 households have installed this roof-top rainwater harvesting system. Each house, thus, obtains 50,000 liters of water annually.
3. Similarly, Tamil Nadu is the first and the only state where a roof-top rainwater harvesting system has been made compulsory for all the houses across the state. There are legal provisions to punish the defaulters.