A recent study has highlighted the significant risk of flooding across multiple areas in Chennai due to the damage caused to stormwater drain networks by ongoing metro rail construction activities. The study, conducted by a collaborative team from the Greater Chennai Corporation (GCC), Chennai Metro Rail Limited (CMRL), IIT Madras, Tamil Nadu Road Development Company (TNRDC), and the disaster management department, identified at least 25 critical stretches where the drainage infrastructure has been compromised.
The report underscores the urgent need for corrective measures to prevent potential flooding during the monsoon season. The damaged stormwater drains, which are crucial for channelling rainwater away from urban areas, have been significantly impacted by the metro construction, raising concerns about the city’s preparedness for the upcoming rains. The committee emphasised that without prompt intervention, these areas could face severe waterlogging, posing risks to both property and public safety.
In response to these findings, the five-member committee has put forward several recommendations aimed at mitigating flood risks. These include the construction of new stormwater drains to replace the damaged sections, the development of water retention wells to manage excess rainfall, and the installation of alternative pipelines with larger diameters to accommodate greater water flow. Additionally, the committee recommended installing extra motors at key locations to expedite water drainage during heavy rains Specific locations identified as high-risk areas include Old Mahabalipuram Road (OMR), Arcot Road, Chennai-Thiruvallur High (CTH) Road, and the bus termini at Villivakkam and Mandaveli. These sites are particularly vulnerable due to the extensive metro construction work and the subsequent damage to existing drainage systems. The committee has called for these remedial actions to be implemented before October, ahead of the monsoon, to minimise the risk of flooding.
The findings of this study have sparked a sense of urgency among city planners and municipal authorities. The GCC and CMRL are expected to collaborate closely to ensure that the recommended infrastructure improvements are carried out promptly. There is also an increasing push for better coordination between various civic bodies to address the dual challenges of urban development and flood management more effectively As Chennai continues to expand its metro network to ease traffic congestion and improve public transport, balancing infrastructure development with effective stormwater management will be crucial. Ensuring that new construction projects do not compromise essential drainage systems is key to safeguarding the city against future flood risks.
