Rain in chainMay 8, 2010
Go in for a stylish RWH system
|It can add to the visual appeal of a building|
Beautiful: Rainwater flows through the chains into a sand filter
Rainwater harvesting has become mandatory in Bangalore. The rule is relatively simple: create storage or recharge at the rate of 20 litres for every square metre of roof area. For the non-roof area of a site create storage or recharge at 10 litres per square metre of such area.
A rooftop rainwater harvesting system consists of a catchment, which is the roof itself; a conveyance system which includes rainwater gutters in the case of a sloping roof and pipes in case of a flat roof; filtration system to keep organic particles and dust out; and, finally, a storage system or a recharge system.
Storage systems can be either rain barrels or sumps. Recharge systems are usually recharge wells. A concern of many is the visual aspect of rainwater harvesting.
Pipes hanging or moving about hardly look pleasing. If designed well, rainwater harvesting systems can add to the visual appeal of a building.
Like a waterfall
In Gowri and Harish’s beautiful earth home, the rainwater harvesting system has been designed with aesthetics in mind. Aluminum gutters collect rainwater from a sloping tiled roof. They convey the rainwater to a downspout where a few strands of hanging chains are placed. Rainwater flows on the hanging chains and adheres to them due to surface tension. During rains the feel and the sound is that of a waterfall. A stone pot camouflages a sand filter. The rain is filtered here and a concealed pipe then takes it into an underground sump tank.
The functionality of the system is not lost and close to 100,000 litres of rainwater is harvested here. At the same time the visual appearance of the building is enhanced as is the curiosity impulse. People ask and are then better informed of the rainwater system.