The Neyyar water-sharing issue is in focus as the long-pending legal dispute between Tamil Nadu and Kerala over Neyyar River water continues before the Supreme Court.
The Neyyar Irrigation Project began in 1951, and Tamil Nadu started receiving irrigation water through the Neyyar Left Bank Canal from 1958 without a formal written agreement.
The project was designed to irrigate 36,000 acres, including about 9,000 acres in Kanniyakumari district, Tamil Nadu.
Kerala supplied around 150 cusecs of water to Tamil Nadu for nearly 40 years, based on mutual understanding.
In 2004, Kerala stopped releasing Neyyar water, leading to a dispute over water sharing and whether the Neyyar is an inter-State River.
Tamil Nadu approached the Supreme Court in 2012, and the case is pending, with arguments yet to begin.