[3] The Mishmi Hills lie in the upper course of the Dibang which enters the plains at Bomjir, Dambuk etc.

Between Bomjir (Nizamghat) and Sadiya the Dibang has a steep river gradient and exhibits braided channel morphology, with its width varying from 4 to 9 kilometres (2 to 6 mi).

[4] The Dibang, with a total length of 195 kilometres (121 mi), enters the River Lohit north of the Dibru-Saikhowa sanctuary near the Assamese town of Sadiya.

The Dibang is also joined by a number of tributaries such as the Airi, Ilu, Imu, Ahi, Ashu, Epipani and Eze (Deopani) rivers during its course.

[3][7][8] On 18 July 2019, the Prime Minister chaired Cabinet Committee on Economic Affairs gave the greenlight to continue with the Dibang hydropower project.