Water harvesting is an old practice. Water harvesting techniques depends on the location where it is to be used. Some of them are listed below:

● Khadins, Tanks and Nadis in Rajasthan.

● Bhandaras and Tals in Maharashtra.

● Ahars and Pynes in Bihar.

● Bhundhis in MP and UP.

● Kulhs in Himachal Pradesh.

● Ponds in Jammu region.

● Eris (tanks) in Tamil Nadu.

● Surangams in Kerala.

● Kattas in Karnataka.

Purpose or rainwater harvesting is not only to hold rainwater but also to recharge groundwater.