Monsoon flooding and water scarcity are persistent challenges in Indian cities, but an innovative drainage system in Coimbatore is turning the tide. Designed by entrepreneur RR Sivaram, the Eco Bloc drain harvests and stores rainwater, reducing floods while boosting water security.
- Eco Bloc drains capture up to 96% of rainwater.
- System uses recycled plastic, reducing environmental footprint.
- Over 50 million litres of water saved since 2020 installation.
What happened
Indian cities often face severe monsoon flooding, resulting in submerged roads, halted traffic, and valuable rainwater lost to drains. Addressing this, entrepreneur RR Sivaram developed Eco Bloc, a smart drain designed to harvest rainwater rather than simply channeling it away.
This system, first installed in Chennai in 2020, utilizes recycled plastic blocks with built-in rainwater harvesting structures spaced every 15 metres. It captures and filters water through a four-stage system before storing it underground in durable tanks. The approach has now expanded to over 5,000 sites, collecting more than 50 million litres of rainwater.
Why it feels good
Eco Bloc represents a win-win solution by reducing urban flooding while conserving a precious resource—freshwater. Its use of recycled plastic also contributes to waste reduction, showing how innovation can tackle multiple environmental issues simultaneously.
With underground tanks capable of supporting heavy traffic and lasting over 50 years, the system is both durable and sustainable. Seeing a previously dry temple tank in Chennai revive after years of drought also brings a tangible sense of hope and progress in water management for communities.
What to enjoy or watch next
As India’s cities approach future monsoons, Eco Bloc’s success offers a blueprint for urban resilience. Widespread adoption of similar systems could help more regions turn flooding challenges into opportunities for groundwater replenishment and improved water security.
Keep an eye on further developments in smart urban infrastructure that combine environmental care with practical design. Innovations like Eco Bloc show how local solutions rooted in thoughtful engineering can have lasting beneficial impacts, inviting cities worldwide to rethink stormwater management.