The Barak River is a 900-kilometre-long (560 mi)[1][2] river flowing through the states of Manipur, Nagaland, Mizoram and Assam in India and into the Bay of Bengal via Bangladesh. Of the 900 km, 524 km is in India, 31 km on Indo – Bangladesh border and the rest is in Bangladesh. The navigable portion of Barak River in India, the 121 km stretch between Lakhipur and Bhanga has been declared as National Waterway 16, (NW-16) in the year 2016.[3][4]
The principal tributaries of the Barak are all in India and are the River Sonai (Tuirial River), the Jiri, the Tlawng (Dhaleswari / Katakal), the Longai, and the Madhura. Tipaimukh Dam is a proposed embankment dam on the Barak River.
Flows into Bangladesh as the Surma river, and becomes the Meghna river before the Ganga-Brahmaputra river system. The Padma River joins it and flows into the Bay of Bengal as the Meghna river.
The proposed Tipaimukh Dam on the Barak River in northeast India – a controversial political issue between India and Bangladesh – could be the last nail in the coffin for the elusive Ganges river dolphin in Assam’s Barak river system, researchers warn.
The Surma-Meghna River System is a river complex in the Indian Subcontinent, one of the three that form the Ganges Delta, the largest on earth. It rises in the Manipur Hills of northeast India as the Barak River and flows west becoming the Surma River and then flows south as the Meghna River.
near Badarpur(Assam) it divides into the Surma River and the Kushiyara River and enters Bangladesh. The principal tributaries of the Barak in India are the Irang, Makru, Tuivai, Jiri, the Dhaleshwari (Tlawng), the Singla, the Longai, the Madhura, the Sonai (Tuirial), the Rukni and the Katakhal.
When the Surma and the Kushiyara finally rejoin in Kishoreganj District above Bhairab Bazar, the river is known as the Meghna River.
Down to Chandupura, Meghna is hydrographically referred to as the Upper Meghna. After the Padma joins, it is referred to as the Lower Meghna.
The name for the largest distributary of the Ganges in Bangladesh is the Padma River. When the Padma joins with the Jamuna River, the largest distributary of the Brahmaputra, and they join with the Meghna in Chandpur District, the result is the Lower Meghna.
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