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Junior science refresher
Buy and subsribe here Junior science refresher published this article page no 14 however due to topographical hydrological and other constraints only about 690 cubic km 32 per cent of the available surface water can be utilised. water flow in a river depends on size of its catchment area or river basin and rainfall within its catchment area. you have studied in your class xi textbook india physical environment that precipitation in india has very high spatial variation and it is mainly concentrated in monsoon season. you also have studied in the textbook that some of the rivers in the country like the ganga the brahmaputra and the indus have huge catchment areas junior science refresher magazine subscription.