K K (Keshoba Krishna) Chatradhara, popularly known as Bhai, born in the 1980s in Subansiri valley, is an eminent river activist, writer and social researcher looking after the rivers, dams, and water in Northeast India. He likes to introduce himself as an environmental survivor who lives in the Subansiri valley of Upper Assam. After completing his Master in Computer Ccience, he went back to his native land to work for his community and started the environmental movement in Subansiri valley. (kkchatradhara@gmail.com,  +91 94354 91437)