Discuss the availability of water resource in the country and factor that 017. determine its spatial distribution. (5) Ans The spatial distributionare : (1) Surface water resource - The mean annual flow in all the river basins in India is estimated to be cubic k.m. There are four major 1869 sources of surface water. These are rivers, lakes, ponds and tanks. Only about 690 cubic km (32%) oft he available surfacewater can be utilised. (2) Ground Water Resource- The total ground water resources in the country are about 432 cubic km. The Gangaand the Brahamaputra basins have about46% of the total groundwater resources. (3) Lagoons Backwaters- There are severalLagoon lakes at the & coastline of India. Such Lakes are largely found in Kerala, Orissa West Bengal. The & water is generally brackish. Factors: Uneven distribution of rainfall (1) Difference in relief (2) Difference in soil types (3) Difference in natural vegetation (4) Drainage system (5) Seacoast (6) Decreasingwater-table (1) Wastage of water (2) Water Pollution Explain (3) Improperwater Management (4) Deforestation (5) PopulationExplosion. (6) 019. What is watershed Management? Do you think can play an important role It in sustain- able development? (5)
017. Discuss the availability of water resource in the country and factor that determine its spatial distribution. (5) Ans The spatial distributionare : (1) Surface water resource - The mean annual flow in all the river basins in India is estimated to be 1869 cubic k.m. There are four major sources of surface water. These are rivers, lakes, ponds and tanks. Only about 690 cubic km (32%) oft he available surfacewater can be utilised. (2) Ground Water Resource- The total ground water resources in the country are about 432 cubic km. The Gangaand the Brahamaputra basins have about46% of the total groundwater resources. (3) Lagoons & Backwaters- There are severalLagoon lakes at the coastline of India. Such Lakes are largely found in Kerala, Orissa & West Bengal. The water is generally brackish. Factors: (1) Uneven distribution of rainfall (2) Difference in relief (3) Difference in soil types (4) Difference in natural vegetation (5) Drainage system (6) Seacoast (1) Decreasingwater-table (2) Wastage of water (3) Water Pollution Explain (4) Improperwater Management (5) Deforestation (6) PopulationExplosion. 019. What is watershed Management? Do you think It can play an important role in sustain- able development? (5)
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