Hyderabad: In a pioneering study published in Hydrological Processes, researchers led by IIT Roorkee have, for the first time, conducted a full-scale isotopic analysis of the Ganga River from its Himalayan origin to its deltaic end, including its major tributaries. The study marks a paradigm shift in understanding how the Ganga is sustained during the hot and dry summer months. The research challenges long-held assumptions by clearly establishing that up to Patna, the Ganga is primarily susta