The Barak River or Barbakro or Agu is a trans-boundary river in India and Bangladesh. It flows 900 kilometres (560 mi) through the states of Manipur, Mizoram and Assam in India. It flows into Bangladesh where it bifurcates into the Surma River and the Kushiyara River which converge again to become the Meghna River before forming the Ganges Delta. Of its total length, 524 km (326 mi) is in India, 31 km (19 mi) in Bangladesh. The upper part of its navigable part is in India — 121 km (75 mi) between Lakhipur and Bhanga, declared as National Waterway 16, (NW-16) since the year 2016. It drains a basin of 52,000 km2 (20,000 sq mi), of which 41,723 km2 (16,109 sq mi) lies in India, 1.38% (rounded) of the country. The water and banks host or are visited by a wide variety of flora and fauna. The principal tributaries are all in India: the Irang, Tuivai, Sonai (or Tuirial), the Jiri, the Tlawng (or Dhaleswari, or Katakal), the Jatinga, the Longai and the Madhura. Tipaimukh Dam is a proposed dam on the river itself.
