26-07-2025
Coimbatore corporation bets big on eco-bloc tech to harvest rainwater
Coimbatore: The city corporation has sent a proposal to the state govt to implement an eco-bloc-based rainwater harvesting project in its limits at a cost of Rs100 crore.
According to corporation commissioner M Sivaguru Prabakaran, the project would be executed with either govt or external funding at 100 locations in the city.
"Sometimes, it will be a combination of govt and external funding.
The capacity of rainwater harvesting structures will vary based on the requirements of each identified location. The cost will also vary accordingly. Residential areas prone to waterlogging have been mapped to set up rainwater harvesting structures."
He said the proposal was drafted based on a survey that the civic body conducted to identify the flood-prone areas, rainfall intensity in each locality, required length of rainwater harvesting structures and the necessary customization of eco-blocs.
This German eco-bloc technology was adopted in the city earlier as part of the Smart City Mission project at Race Course after Chennai successfully implemented the same to harvest rainwater. This technology offers a customized structure easy for maintenance. Another highlight is minimal siltation. Even the run off rainwater could be stored for reuse.
The eco-bloc module structure is made of recycled polyethylene materials.
by Taboola
by Taboola
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The installation process includes the use of two geotextile liners and two stone filters. The geotextile liners help prevent accumulation of silt within the eco-bloc modules. These blocks are easy to install and said to last for more than a decade.
The eco-bloc-based rainwater harvesting structures have been set up at the upcoming Semmozhi Poonga at the central prison grounds. While the structures are yet to be put to use, the plan is to store rainwater in tanks with a storage capacity of 15 lakh litres to be later used for irrigation purposes. A few schools in the city, including the corporation middle school at Edayarpalayam, also have set up eco-bloc-based rainwater harvesting structures.