During the incessant rains that paralysed the city on 1 July this year, the Brihanmumbai Municipal Corporation of Greater Mumbai flushed out more than 13,694 million litres of rainwater into the sea.
Subhajit Mukherjee, the founder of city-based NGO, Mission Green Mumbai, has found a cost-effective solution to the problem of rainwater wastage using PVC pipes and a water barrel/drum.
Thanks to the attention the solution has received, the Malad resident is now installing rainwater harvesting and groundwater recharging system in schools and private societies.
The concept is straightforward. It channels water that falls onto your terrace into a pit underground to conserve and revive groundwater and other water bodies like ponds, lakes, and deep tube wells. It can be extracted for use too.
Mukherjee adds how the drum can hold water for seven to 10 days as it takes time for the water to seep entirely into the ground. He has suggested the institutes, who have installed the system, to use the harvested water to mop floors, water trees or clean toilets.
Also, if installed in societies, this water can be used for the secondary purpose of washing vehicles, adds Mukherjee.
While installing these units, one must remember to keep them at least 10 to 20 feet away from the main building to prevent the water from seeping into the building walls and making them weak.
He has executed the project in more than 33 schools in the last month, working with almost 20,000+ students. He aims to scale this number up to 100 schools soon.
The cost for the entire installation can range between Rs 2,500 to 5,000 based on the availability of resources and labour required, in a lot of spaces where drums and pipes are available, it is done for free, says Mukherjee.
It is indeed unfortunate that we have huge towers in the city, but we fail to do something as simple as harvest rainwater every monsoon, that too in a place where it rains abundantly. As humans, water is the first element we are exposed to, like in the womb of our mothers.
This system is easy to install and is much like creating a mini-well. We need to take ownership of the quality of life that we deserve.
Reference: The Better India