Rainwater harvesting/Rain is Gain Tool

Use this tool if: you are a professional working in WASH, water supply or agriculture; you are looking for alternatives to conventional ways of water supply to make your project more sustainable, or you have problems with the availability of water resources in your project.

This tool provides you with practical information on rainwater harvesting and shows that rainwater harvesting is a viable alternative and an addition to conventional ways of water supply. It allows you to estimate how much of your water needs can be covered by collecting and storing rainwater, and which techniques might be most appropriate.



Rain is Gain Tool
Discover what the potential of rainwater harvesting can be in your project. Go through the steps below, fill in your water needs and calculate your potential of rainwater supply. The Rain is Gain tool provides you with an estimate of quantity of rainwater that could be generated by various rainwater harvesting techniques in your project area. It helps you determine whether or not this is enough to meet your water expectations, including different solutions.


 * First, let’s calculate your water needs: the amount of water needed for different purposes - from domestic to productive.
 * YOUR WATER NEEDS (scroll to middle of page)


 * Now let’s calculate your water supply: the amount of water that can potentially be generated by different rain water harvesting techniques in your project area.
 * YOUR WATER SUPPLY (scroll to middle of page)

What is Next?
Explore rainwater harvesting technologies and techniques.

Rainwater harvesting pages.

Broader Context
Each decision on rainwater harvesting is context specific. The characteristics of the landscape, people's needs, local practices and laws & legislation differ in each country or catchment area. This can significantly influence your project. Therefore, when thinking about incorporating rainwater harvesting in your project, it is useful to take into account the following five aspects:

Acknowledgements

 * RAIN. Rain is Gain Tool
 * Original Akvopedia article: akvopedia.org/wiki/Rain_is_Gain_Tool