Dr. Ainun Nishat has said Bangladesh and India should sit for annual hydrological assessment to resolve the water allocation of the Teesta river. "The basin of River Teesta is confined between India and Bangladesh. It has to be solved by both countries," said Professor Emeritus, and advisor of Centre for Climate Change and Environmental Research, BRAC University.  He also stated that India unilaterally is withdrawing water from the Teesta which is not acceptable ethically and also not acceptable under any international law, even under Indian law.  The 1958 law on transboundary water uses or inter state water uses also do not support this sort of diversion of water, said the expert.  Dr Nishat was speaking as the chair at the three-day-long virtual 7th International Water Conference 2022 titled "Teesta River Basin: Overcoming the Challenges" The three-day conference organied by ActionAid Bangladesh began on Thursday.  Dr. Imtiaz Ahmed said the river is no longer a river and people now can literally walk across it in dry season.  "Local people of India also flagging issue that the dams on Teesta imposing threat to the biodiversity and the livelihood of thousands of people including violation of Indigenous rights to land,” said the Professor at Department of International Relations, University of Dhaka, in his keynote presentation.    The conference will continue till January 22 under the theme ‘Teesta River Basin: Overcoming the Challenges’.   Read:Govt takes Tk 85bn-plan to develop both sides of Teesta River: Tipu Munshi The first day of the conference focused on the thematic issue- History, Morphology and Spatiotemporal Changes of Teesta and Surrounding Rivers.