Turn system will be introduced in case of failure of monsoon or slump in storage: Collector THENI: Water was released from Periyar dam for irrigation of first crop in the double cropping area in Cumbum Valley and from Vaigai dam for irrigation of lands in Madurai and Dindigul districts on Tuesday. While Finance Minister O. Panneerselvam released water from Periyar dam, Minister for Cooperation Sellur K. Raju released water from Vaigai dam at 11 a.m., simultaneously. Initially, 200 cusecs of water will be released from Periyar dam for 120 days continuously for irrigating 14,707 acres