Editing Brahmaputra River (section)

====Assam====
[[File:Bank of Brahmaputra river-Guwahati 2.jpg|alt=Bank of Brahmaputra River in Guwahati.|thumb|Bank of Brahmaputra River in Guwahati]]
The Dihang, winding out of the mountains, turns towards the southeast and descends into a low-lying basin as it enters northeastern Assam state. Just west of the town of Sadiya, the river again turns to the southwest and is joined by two mountain streams, the Lohit, and the Dibang. Below that confluence, about {{cvt|1,450|km|mi|abbr=on}} from the Bay of Bengal, the river becomes known conventionally as the Brahmaputra ("Son of Brahma"). In Assam, the river is mighty, even in the dry season, and during the rains, its banks are more than {{cvt|8|km|mi|abbr=on}} apart. As the river follows its braided {{cvt|700|km|mi|abbr=on}} course through the valley, it receives several rapidly flowing Himalayan streams, including the Subansiri, Kameng, Bhareli, Dhansiri, Manas, Champamati, Saralbhanga, and Sankosh Rivers. The main tributaries from the hills and from the plateau to the south are the Burhi Dihing, the Disang, the Dikhu, and the Kopili.

Between [[Dibrugarh district|Dibrugarh]] and [[Lakhimpur District]]s, the river divides into two channels—the northern Kherkutia channel and the southern Brahmaputra channel. The two channels join again about {{cvt|100|km|mi|abbr=on}} downstream, forming the [[Majuli]] island, which is the largest river island in the world.<ref>{{cite web|last1=Majuli|first1=River Island|title=Largest river island|url=http://www.guinnessworldrecords.com/world-records/largest-river-island-|website=Guinness World Records|access-date=6 September 2016|archive-url=https://web.archive.org/web/20160903033856/http://www.guinnessworldrecords.com/world-records/largest-river-island-|archive-date=3 September 2016|url-status=live}}</ref> At [[Guwahati]], near the ancient pilgrimage centre of [[Hajo (India)|Hajo]], the Brahmaputra cuts through the rocks of the [[Shillong Plateau]], and is at its narrowest at {{convert|1|km|yd|abbr=on}} bank-to-bank. The terrain of this area made it logistically ideal for the [[Battle of Saraighat]], the military confrontation between the Mughal Empire and the Ahom Kingdom in March 1671. The first combined railroad/roadway bridge across the Brahmaputra was constructed at [[Saraighat]]. It was opened to traffic in April 1962.

The environment of the Brahmaputra [[floodplain]]s in Assam have been described as the [[Brahmaputra Valley semi-evergreen forests]] [[ecoregion]].