What is Rain Water Harvesting? Write any two methods of Rain Water Harvesting popular in different regions of India?

(i) A technique in which rain water is filled in empty places,tanks in houses, abandoned dugwell etc.Later it is used.
(ii) In hill and mountainous regions, people built diversion channels like ‘guls’ and ‘kuls’ for irrigation. (iii) ‘Rooftop rain water harvesting’ was commonly practiced to store drinking water ,particularly in Rajasthan.
(iv) In the flood plains of Bengal, people developed inundation channels to irrigate their fields.
(v) Rain fed storage structures like the ‘Khadins’ and ‘Johads’ in arid and semi-arid regions.