METHODS
In ancient days itself, people, especially Indians, know the methods of conservation of rainwater. There are evidences that, even during Harappan period, there was very good system of water management as could be seen in the latest excavation at Dholavira in Kachch. During independence period, the people use to manage water resources considering it as part of the nature which is essential for their survival. This could be seen from the rain water harvesting structures in the low rainfall areas of Rajasthan, harvesting springs in hilly areas and mountainous region and percolation ponds and tanks in southern India.

In Tamil Nadu, the ancient people stored rainwater in public placed separately one for drinking purposes and another for bathing and other domestic purposses and called them as Ooranies. They also formed percolation tanks or ponds, for the purpose of recharging irrigation or domestic wells. They periodically clean the water ways so as to get clean water throughout the year. These are instances in the history that people constructed crude rubble bunds across river courses either for diversion of water or for augmenting the ground water. The various methods of rainwater harvesting are classified below under two category, Traditional and Modern methods.

Traditional Methods
 

Traditional rainwater harvesting, which is still prevalent in rural areas, was done in surface storage bodies like lakes, ponds, irrigation tanks, temple tanks etc. In urban areas, due to shrinking of open spaces, rainwater will have to necessarily be harvested as ground water, Hence harvesting in such places will depend very much on the nature of the soil viz., clayey, sandy etc. The below listed are the various kinds of traditional rainwater harvesting methods. Click for more detailed info

Kunds of Thar Desert
Kul Irrigation Method
Bamboo Method
Temple Tanks of India

Modern Methods
 

The Modern methos of rainwater harvesting are categorised under two, they are Artifical Recharging and Rain Water Harvesting. The former is classified into Absorption Pit Method, Absorption Well Method, Well cum Bore Method and Recharge trench cum injection well. The later is categorised into Individual Houses and Grouped Houses which are further classified into Percolation Pit Method, Bore Well with Settlement Tank, Open Well Method with filter bed Sump and Percolation Pit with Bore Method.

Artifical Recharging
   Absorption Pit Method
   Absorption Well Method
   Well cum Bore Method
   Recharge trench cum injection well
 
Rain Water Harvesting
      Individual Houses
Percolation Pit Method RWH in Grouped Houses(Flat)
Bore Well with Settlement Tank  
Open Well Method with filter bed Sump  
Percolation Pit with Bore Method  
(click for more detailed info.)
   
Rural RWH Methods
Rain water harvesting for Rural Areas
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