IDUKKI: Weakening of the South West monsoon over the state has disturbed the power managers as water storage in most of the dams, including the main dam of Idukki is not at encouraging levels. The Idukki dam has only 844 million cubic metre (mcm) of water against its maximum capacity of 1,460 mcm which is enough to generate power for five months only. Now, the KSEB is looking forward to North East monsoon which has failed for the last few years in the state owing to climate change.
Since the dam was commissioned in 1976, the shutters have been opened only twice on October 22, 1981 and November 16, 1992.
Water level in the dam had crossed the mark of 2,400 ft four times in 1981, 1992, 2007 and 2013. Water level in the dam had crossed its full level of 2,403 ft in 1981 forcing to release water for the first time in its history. The minimum water level recorded in the dam was on June 12, 1983, when it had fallen to 2,280.59 ft. The catchment area of the dam had received maximum rainfall of 224.50 mm on August 8, 1986. Maximum inflow in the dam was recorded on July 25, 1989 when the flow of water was enough to generate 3,956.58 million units of power on a single day. ENS