The row over Cauvery has exacerbated in the last few years because farmers of Tamil Nadu in the Cauvery delta which is famous for growing rice, started growing summer rice which was never part of the tradition, she said.
"With water availability, you start growing summer rice which leads to an increased demand at a time when water is even more scarce. That would have been okay if the neighbouring part which is Karnataka also did not start growing both rice in summer, but also farmers started growing sugarcane," Narain said.
"Bangalore for instance has a Cauvery 4 project and a large part of its water - 1,2,3,4 comes from Cauvery," she said during Facebook Live interaction organised by Centre for Science and Environment (CSE) on the Cauvery imbroglio.
Today there is Cauvery water tribunal and it is very clear how the water is to be shared, while every dam that goes through a process of environmental clearance there is a clear allocation made based on which the dam is agreed upon, Narain said.
More From This Section
"You will have more extreme rains and also a situation where you will have less rains and that is what you are seeing today in Karnataka, in parts of Telangana.
"Bihar is facing such extreme rains that regions are under water, but you still have drought. We need to understand that India's water future is going to be very different," Narain said.
Tamil Nadu and Karnataka have witnessed violent protests in the wake of the Supreme Court's order over distribution of Cauvery river water.