Hi Ganesh,

Indira Gandhi National Open University(IGNOU) offers Certificate in Water Harvesting and Management (CWHM) programme. TH details are mentioned below:-

• Minimum Duration: 6 Months
• Maximum Duration: 2 Years
• Course Fee: Rs. 2,400
• Eligibility: 10+2 Senior secondary pass-outs

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!