“The Godavari, Krishna and Cauvery rivers have experienced dramatic changes in flow due to the construction of dams, anthropogenic contamination and other activities, National Geophysical Research Institute (CSIR-NGRI) senior scientist Dr S. Masood Ahmad said here on Sunday.

“The Godavari would require significant intervention to protect its ecosystems and the people, who are mainly dependent on its river basins,” he added. (About 135 million people inhabit the river basins of the Godavari and Krishna.)