Heavy discharge of water — more than the delta requirement — continued for the third consecutive day from Mettur dam on Wednesday. Due to subsequent increase in inflow into the Cauvery at Mukkombu Upper Anicut, the Public Works Department stepped up release of excess water into the Coleroon.

The quantum of release that stood at 150 cusecs on Tuesday evening went up to 38,793 cusecs on Wednesday morning. It is the highest discharge into the Coleroon since August 7, 2013, when it was 81,000 cusecs.

According to PWD’s River Conservation Division officials, the inflow stood at 69,660 cusecs at Mukkombu Upper Anicut on Wednesday morning and 30,067 cusecs was released into the Cauvery for irrigation. Similarly, 600 cusecs was released into the Uyyakondan canal. The remaining water was being discharged into the Coleroon in order to prevent flood.

T.P. Ganesan, Executive Engineer, PWD, Tiruchi, told
The Hindu
that it had been decided to maintain about 30,000 cusecs in the Cauvery. It was sufficient for irrigation and filling up of tanks and lakes in delta districts. The inflow beyond 30,000 cusecs would be treated as excess water and discharged into the Coleroon.

Going by the current trend of inflow into Mettur dam, he said discharge of excess would continue for a few more days. Hence, people living along low-lying areas in Tiruchi, Ariyalur and Cuddalore districts had been asked to move to safety immediately.

Stating that there was no need for alarm, Mr. Ganesan said there was a well-established water management system in place to regulate excess water in order to prevent flood. The Coleroon had a capacity to carry about 4 lakh cusecs. There was no chance of breach of bunds. However, round-the-clock vigil was being maintained.

A proposal had been sent to the State government, seeking permission to open Pullambadi and New Kattalai canals for irrigation. A Government Order was expected anytime for opening the canals, he added.

Closed

The Mukkombu Upper Anicut remained closed to the public for the second consecutive day on Wednesday as a precautionary measure to prevent drowning.

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