The ₹70-crore challenge is predicted to permit free movement of water and tidal trade
The Water Sources Division (WRD) has proposed to assemble a coaching wall on the mouth of the Cooum to forestall formation of sand bar. Work is predicted to be taken up in three months after getting setting clearance.
The Cooum carried about 13,000 cusecs of water throughout current heavy rain. The movement has dipped to about 8,500 cusecs.
Officers stated heavy equipment had been used to clear the sand deposited now on the mouth of the river and maintain it confide in 120 metres. The river had minimal movement through the different months of the 12 months. The movement was insufficient to minimise sand bar formation. The actions on the Chennai harbour led to sedimentation at a quick tempo. The proposed coaching wall for 265 m on northern facet and 310 m on the southern facet was estimated to value ₹70 crore.
A mixture of boulders and concrete tetrapods had been deliberate for the development of coaching wall. This is able to add extra energy to the construction and permit tidal trade, the officers stated. The coaching wall was designed primarily based on a research by the Nationwide Institute of Ocean Expertise.
Freed from obstructions
The challenge will assist maintain the mouth of the river open. It will enable free movement of water and stop inundation in areas resembling Arumbakkam and Aminjikarai on account of sand bar formation. Work can be accomplished in 18 months.
The construction can be constructed with out disturbing the groynes laid close to the mouth and assist in coastal safety, the officers added.
