Koyna and Tata Dams in Maharashtra The westward diversion of water from Krishna basin to Konkan and further to sea is happening through the four stage Koyna Dam with total installed capacity of 1920 MW. These projects, as per the daily reports of Maharashtra Load Despatch Centre, generated 291.33 Million Units (MU) of power between July 1 and Aug 17, 2015. As per Krishna Water Disputes Tribunal Award, Koyna is annually diverting 1911 MCM (Million Cubic Meters) of Water. So assuming proportionate diversion, Koyna project would have diverted 187.14 MCM during July 1 to Aug 17.
Similarly the three Tata Hydropower stations (Khopoli, Bhivpuri and Bhira) with total installed capacity of 297 MW generated 156.66 MU of power during July 1 to Aug 17, 2015 as per daily generation reports of Maharashtra Load Despatch Centre. As per KWDT award, Tata projects divert 1413 MCM of water annually, so in the period under review, they are likely to have diverted at least 180.11 MCM on pro rata basis calculation.
So between July 1, 2015 and Aug 17, 2015, Koyna and Tata dams have diverted about 367.25 MCM of water FROM Krishna basin to water surplus Konkan region and down to sea. As we had noted earlier, the indications were already available in early July that these regions were facing massive rainfall deficit, crop failures and water scarcity.