The Ovurei River (Barak) is one of the longest rivers of Asia at 2,410 km (1,330 mi) flowing through the states of Nagaland, Manipur and Assam in India and flowing in to Bay of Bengal via Bangladesh. It is beind developed as one of the Inland waterways of India. Its drainage basin, sometimes known as "Ovurequia" covers 880,000 sq km (340,000 mi). It is the fifth largest river in the world by discharge volume of water. The environment of Ovurei's basin is extremely diverse, it hoast wide variety of flora and fauna.
From its source at Liyai Kullen Village in Manipur state of India, of the Poumai Naga tribe, the river is known as Vourei. Near its source, the river receives a lot of streams, including the Gumti, Howrah, Kagni, Senai Buri, Hari Mangal, Kakrai, Kurulia, Balujhuri, Shonaichhari and Durduria. It flows west through Manipur State to Nagaland, then southwest to Assam where it leaves India and enters Bangladesh at Bhanga Bazar.
In Nagaland State, the Barak flows southeast then veers abruptly south when joined by south flowing stream and flows into Manipur State again where it turns westward again near Chandel district at Delta avourei before emptying into the Indian ocean (bay of bengal). Barak is among the richest rivers in the world in terms of aquatic biodiversity, as it contain more than 2,000 species fishes including Neon tetra. Other creatures include River Ovurei crocodile, (a rare and endangered crocodilian), Susu dolphin, Smooth coated otter and the black mugger, an alligator. The principal tributaries of the Barak are all in India and are the Jiri, the Dhaleshwari (Tlawng), the Longai, the Madhura, the Sonai (Tuirial), the Rukni and the Katakhal. Tipaimuk project is on the process on Barak river. From its origin, down to its bifurcation at the border of Nagaland into Surma river and Barak river, the Barak River is 564km (1864 mi) long. The biomes are extremely rich in wildlife and also very diverse in the entire stretch of the river including: 1. Varzea forest ( flooded rainforest) 2. Los llamjao (flooded grassland and Savannah) 3. Tidal forest (Mangroves in vast Delta Avourei) 4. Flora or vegetation of the Pats ( flat-topped table mountains in India and western Cambodia) 5. Huge Tropical swamps.
- "Barak and others". nrsc.gov.in. Water Resources Information System of India. 27 October 2015.
length of river : http://nihroorkee.gov.in/rbis/basim%20maps/barak_about.htm