Mullaperiyar dam shutters to be opened when water level reaches 138 feet


P Suresh Babu

Although this rule curve has been submitted to the Supreme Court, Kerala is not ready to accept it. Kerala is of the view that it is not correct to set the rule curve at 142 feet twice. Because of this, the court did not say the decision on the rule curve.

Mullaperiyar

Mankulam: It has been decided by the supervisory committee appointed by the supreme court that the water level in the Mullaperiyar dam should be regulated according to the rule curve. According to the status report submitted to the court by the Central Water Commission, the current rule curve is 138 feet. When the water level reaches this level, the spillway shutters of the dam will be opened and water will be released to the Periyar river. The current water level is 137.6 feet.

As of Tuesday morning, 3244 cusecs (cubic feet per second) of water was flowing into the dam. Of this, 2077 cusecs is being carried to Tamil Nadu. The rule curve for ten days from June 10 to November 30 is detailed in the status report filed in the Supreme Court last week. The rule curve for June 10 is 136 feet and then it increases. The rule curve is 140 feet on September 10 and the maximum water level on September 20 is 142 feet. Then again it decreases.

Although this rule curve has been submitted to the Supreme Court, Kerala is not ready to accept it. Kerala is of the view that it is not correct to set the rule curve at 142 feet twice. Because of this, the court did not finalise the rule curve.

Following many discussions, the Tamil Nadu representative and the Chief Engineer of the Water Commission finally said that the water level would be controlled as per the existing rule curve. The decision will be informed in the court on Wednesday. With this, a rule curve will be fixed for Mullaperiyar Dam as well. Kerala has asked Tamil Nadu to inform 24 hours before releasing water.

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