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11.Water Resources of India., Work out, A. Fill in the blanks with the correct answers., 1. Bores are dug up for irrigation purposes., 2. Indus is a perennial river., 3. The Bhakra-Nangal dam is built over the Satluj river., 4. Water is a renewable source of energy., 5.Goundwater is getting exhausted., B. Write T for true and F for false., 1. Water is a natural resource., True, 2. Water stored in dams is released through sluice gates., True, 3. Rainwater harvesting is an efficient way of conserving water., True, 4. Lakes are generally surrounded by water on all sides., False, 5. Dams are constructed to save water., True, C. Match the columns., 1. Bhakra-Nangal Dam. (C) a. Damodar, 2. Damodar Valley project (a) b. Narmada, 3. Hirakud Dam. (e). c. Satluj, 4. Sardar Sarovar Dam. (b). d. Krishna, 5. Nagarjuna Sagar Dam (d). e. Mahanadi, D. Answer these questions., 1. What is the source of groundwater?, Ans- Rain is the source of ground water., 2. Name any two man-made sources of water., Ans- Well,Dams and Bores, 3. Why are dams important?, Ans- A dams is used to produce electricity.It also helps in controlling floods and in the development of the fishing industry., 4. Why is it important to conserve water? Write three ways in which water is conserved in India., Ans- Because water is valuable resource and it is essential for survival., Three ways are: Rain water harvesting, Plantation and To use water wisely., 5. Write any three ways in which you can save water., Ans- By rainwater harvesting ,by planting tree and to use water wisely, 6. Name any two river valley projects of India. Map work On an outline map of India, mark the important river valley projec of India., Ans- Bhadra - Bangal Dam , and Hirakud Dam