Hi Ganesh,
Indira Gandhi National Open University(IGNOU) offers Certificate in Water Harvesting and Management (CWHM) programme. TH details are mentioned below:-
Refer here for more info - http://ignou.ac.in/ignou/aboutignou/school/soa/programmes/detail/34/2
Feel free to ask doubts in the Comment Section.
I hope this information helps you.
Good Luck!
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