What is the source of water required for horticulturist?

Water required for Horticulturist is approx. 0.7 MGD (million gallon per day), will be provided from the small dams already exist on site. Rain water will be collected and stored during moon-soon and winter rains in these dams. As per last 50 years rain data record collected from diff. Departments, we can get from our site and surrounding areas approx. 287 MG water in one season