How are rainwater systems prevalent in India with different names and methods?

There are traditional rainwater harvesting systems followed in India. They are:

1) In mountainous regions, the technique named as ‘kul’ and ‘gul is used where the diversion channels are built.

2) Next is the rooftop technique which is mostly used in Rajasthan.

3) Structures named ‘khadins’ and ‘johad’ are also used in Rajasthan where the agricultural fields are converted into storage structures.

4) In Bikaner, Phalodi tankas which are the underground water storage tanks are used to store water.

The rooftop technique is used even today in urban areas to conserve rainwater and use it when needed.