Harvesting rainwater.
Fig. I: Water harvesting structure for industrial plots
THE concept of water harvesting is very old but it came into prominence only in the drought year of 1987. Water harvesting essentially means storing/conserving rainwater runoff either through a storage reservoir or by injection in substrata formations through boreholes. Three considerations should be taken into account before launching water harvesting projects.
a) Where run-off goes to sea: The discharge from hills into sea is of little …
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…to the sea ultimately. This is the real loss. Conservation of rainwater for cities outflow and hillocks is not even 0.001% of the loss of water through undammed rivers. It is, however, heartening to note that the Ministry of Power and Irrigation, Government of India, has made a blueprint for developing hydropower of 50000 MW by the year 2017. If this dream comes true, then dams constructed for the purpose will also achieve water harvesting.
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