Tenders to be floated for constructing training wall at the Cooum mouth

Coastal regulation zone clearance given. The Water Resources Department to complete the ₹70-crore project in 18 months

Updated - September 20, 2022 08:03 am IST

Published - September 19, 2022 09:19 pm IST - CHENNAI

Plans are afoot to build a training 265-metre-long training wall on the northern of the Cooum mouth. File photo

Plans are afoot to build a training 265-metre-long training wall on the northern of the Cooum mouth. File photo | Photo Credit: The Hindu

The decks have been cleared for the long-pending proposal to construct a training wall at the mouth of the Cooum river to minimise sand bar formation.

The Water Resources Department will call for tenders for the work in a few days as coastal regulation zone clearance has been obtained.

The Cooum had carried nearly 13,000 cusecs during heavy rain last year.

The officials said nearly 24,000 cusecs of water drained into the sea from the Cooum during the 2015 floods. However, the flow was inadequate to reduce the development of sand bars at the mouth. Moreover, the presence of Chennai harbour accelerated the sedimentation.

The department has planned to build a training wall on either side of the mouth perpendicular to the sea to ensure permanent opening of the river mouth and direct the river flow into the sea.

The training wall has been planned to be built for a length of 265 metres on the northern side and 310 metres on the southern side at an estimated cost of ₹70 crore.

It would be built as a combination of boulders and concrete tetrapods and based on the design and suggestions provided by the National Institute of Ocean Technology. The structure would allow smooth tidal exchange, easy draining of flood water and help in coastal protection, the officials said.

At present, only five metres of the mouth remains open. Steps would be taken to clear the sand bars to keep the river mouth open temporarily during the rainy season until the project was started.

Once the project is completed in 18 months, the impact of tidal exchange would be felt till Chetpet bridge. It now reached only up to Chintadripet. Sewage outfalls in the river must be plugged for sustainable eco-restoration of the river, the sources said.

A similar project to build straight training walls at the mouth of Ennore creek to minimise floods in the upstream areas is yet to kick off due to paucity of funds. The proposal is awaiting tie-up with Kamarajar Port Ltd.

0 / 0
Sign in to unlock member-only benefits!
  • Access 10 free stories every month
  • Save stories to read later
  • Access to comment on every story
  • Sign-up/manage your newsletter subscriptions with a single click
  • Get notified by email for early access to discounts & offers on our products
Sign in

Comments

Comments have to be in English, and in full sentences. They cannot be abusive or personal. Please abide by our community guidelines for posting your comments.

We have migrated to a new commenting platform. If you are already a registered user of The Hindu and logged in, you may continue to engage with our articles. If you do not have an account please register and login to post comments. Users can access their older comments by logging into their accounts on Vuukle.