India Water Portal 21 Aug, 2009 . 1 min read Facebook Twitter SHARE This presentation explains the basics of rainwater harvesting. Calculate the amount of rainwater you can harvest off your roof and design your own RWH system. Download the presentation from below Post By: rajshekar Attachment Rooftop rainwater harvesting - Presentation (2006) Topic Climate and WeatherRainfall and other forms of PrecipitationRainwater HarvestingRural WaterSustainabilityUrban WaterTechnology Sub Categories Presentations Regions Political India Email Address View the discussion thread.