Chennai civic body finds solution for low-lying storm water drains

Civic body comes up with an innovative two-phase technique for constructing new storm water drains in Tondiarpet that will cost D9 crore; construction nearing completion; expected to be operational ne

Published: 30th November 2016 01:54 AM  |   Last Updated: 30th November 2016 03:31 AM   |  A+A-


The redesigned storm water sump being constructed in Tondiarpet | Ashwin Prasath

Express News Service

CHENNAI: Has the Chennai Corporation finally found a solution to its water stagnation woes ?
The civic body for the first time has come up with an innovative two-phase technique for constructing new Storm Water Drains (SWDs) in Tondiarpet that will cost Rs 9 crore .

Most drains in stretches where the gradient is positive (upward slope) get clogged leaving roads in the vicinity flooded during monsoon. With Integrated Storm Water Drains not on the cards for at least the next five years, the Corporation was on the look out for an alternate solution following 2015 floods.

Ten months down the line, the authorities have come up with a plan along Elaya Street in Tondiarpet which was left inundated for weeks even after flood waters receded in surrounding areas.

The original SWD network in this road was designed to drain excess rainwater collected along the 1.5-km stretch into the sea through canals along Thiruvottiyur High Road. However, run-off water flowing through the SWD in this upward stretch started flowing in the reverse direction flooding the railway culvert in the south end. To handle this, the civic body installed a sump-motor arrangement.

A Corporation official said that to bridge the one-metre high difference between Elaya Street and Thiruvottiyur High Road, a sump (13-metre long and 4.5 metre deep) with a capacity to hold 2.34 lakh litres of water was constructed at T P Koil Street. Two high-powered motor pumps (25 HP) were connected to the sump operating in tandem. The pumps diverted the natural flow of run-off water against gravity and drained them into the sump which in turn was pumped out into canals in the higher elevation (in Thiruvottiyur High Road). The water reaches the exit point through North Beach Road.

Though there were several practical difficulties associated in maintaining the setup and ensuring uninterrupted power supply during the monsoons, the project is expected to serve its purpose till further comprehensive plans are made for core areas in the city.
“The project cost is `9 crore with the construction nearing completion and is expected to be operational next week,” said a senior official.


Disclaimer : We respect your thoughts and views! But we need to be judicious while moderating your comments. All the comments will be moderated by the editorial. Abstain from posting comments that are obscene, defamatory or inflammatory, and do not indulge in personal attacks. Try to avoid outside hyperlinks inside the comment. Help us delete comments that do not follow these guidelines.

The views expressed in comments published on are those of the comment writers alone. They do not represent the views or opinions of or its staff, nor do they represent the views or opinions of The New Indian Express Group, or any entity of, or affiliated with, The New Indian Express Group. reserves the right to take any or all comments down at any time.

flipboard facebook twitter whatsapp