Why does the Brahmaputra River have a braided channel in Assam?

The Brahmaputra River develops a braided channel in Assam primarily due to its exceptionally heavy sediment load and the high volume of water it carries. As the river descends from the Himalayas and enters the plains of Assam, it receives numerous rapidly rushing tributaries that contribute significant amounts of silt.12

Braided channels typically occur in rivers characterized by weak banks, mobile bed material, and a high width-depth ratio. In the case of the Brahmaputra, the river's massive discharge and heavy sediment transport lead to the formation of midstream bars of sand and gravel. These bars subdivide the main flow into multiple smaller, less efficient channels. Because the river is constantly shifting and depositing this sediment, these islands—known as chars—frequently appear and disappear, causing the river's course to change continually over time.312