Build Water Self Sufficiency with Rooftop Harvesting

In this new series titled Sustainable Home, we will take you through a series of videos on how to build a sustainable home. At Aanandaa, we are building an innovative and creative home, which is as sustainable as possible.
An essential feature of a sustainable house is rooftop rainwater harvesting. In our #sustainablehouse, we have designed a simple #waterharvesting system, which allows us to harvest upwards of 100,000 litres of water each year.
You may not be aware of how much rainwater is falling on your rooftops, and simply making its way to the drains. If you would like to know how much water you are getting, use this simple formula.
Rooftop Area (in sq m) x Annual Average Rainfall (in mm) x Runoff Coefficient of the material used on your rooftop = Total Rainwater you receive annually (in Litres).
In our sustainablehouse, the rainwater makes its way to the drain, which descends down to the ground level, and through many interconnecting chambers makes it way to the rainwater filter.
The rainwater filter is made of alternating layers of gravel and gro textile. The rainwater falls to the bottom of the rainwater filter, and gets cleaned in the process. The clean water rises to the top, and through the outlet pipe, enters the rainwater harvesting tank.
Once the rainwater harvesting tank is full, it pumps this water into the triple tank (which is the larger tank) and in turn, it pumps water into the overhead tanks.
When the tanks fill up to the brim, the overflow finds its way to our ponds. We can see the overflow clearly, indicating to us that the rainwater tanks are FULL.
You will be amazed at how much water is falling on your rooftops. Why don't you calculate an approximate volume, and share it in the comments section. Maybe you can think of a way to harvest the water from your rooftop too?
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