Geography (NTSE/Olympiad)  

2. Water Resources

Rain Water Harvesting

Rain Water Harvesting
Rainwater Harvesting : It is a technique of increasing the recharge of ground water by capturing and storing rain water by constructing structures such as percolating pits, check dams etc.
Different Techniques to Conserve Water :
1. People of mountaneous regions had built diversion channels like ‘guls’ and ‘kuls’ for agriculture.
2. Rooftop rain water havesting was commonly practiced to store drinking water. eg. Rajasthan.
3. In the flood plain of Bengal, people developed inundation channels to irrigate their fields.
4. In arid and semi-arid regions, agriculatural fields were converted into rain fed storage structure that allowed the water to stand and moisten the soil like the ‘Khadins’ in Jaisalmer and ‘Johads’ in other parts of Rajasthan.
Rain Water Harvesting through Tanks :
1. In the semi arid and arid region of Rajasthan particularly in Phalodi, Bikaner and Barmer most of the houses, have underground tanks for storing water.
2. These tanks were part of well developed roof top rain water harvesting system.
3. Rain falling on the rooftops would travel down the pipe and was stored in tankers.
4. The first spell of rain was usually not collected as this would clean the roofs and the pipes.
5. The rain water from the subsequent showers was then collected.

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