Rainwater harvesting itself means storage of the rainwater for future use. This storage of water can be used for a variety of purposes. Even the process of recharging of the groundwater is done by the rainwater harvesting, but this recharge of groundwater is the natural process. The rainwater harvesting is one of the most efficient ways of utilization of water with least cost and natural process. Rainwater harvest increases the availability of the groundwater, improves the quality of the groundwater and increases the fertility of the soil. It has been practised by the people over a long period of time and through different methods.
Rainwater harvesting is practised in different forms by the different states in India. They are:
• The rainwater harvesting in Rajasthan is locally known as kund or tanka. This is a process in the underground tank is dug near the house (kund or tanka) and the rainwater is stored in that kund or tanka. The programme of Arvary Pani Sansad was introduced in Rajasthan and most of the homes were helped to construct the tanks.
• In the Tamil Nadu, the government has made mandatory to harvest the rainwater. The government has helped to construct the necessary requirements for rainwater harvesting.
• Haryali (the watershed management project) project was developed by the central government to help the poor people to conserve the water. This project was mainly focused on the rural population to conserve the water for drinking, irrigation, fisheries and afforestation purposes.
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