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How does the Brahmaputra River help form the Ganges-Brahmaputra delta?

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Map showing the course of the Brahmaputra River as it flows from southwestern China through northeastern India and into Bangladesh, with surrounding countries including Bhutan, Nepal, Myanmar, Pakistan, and Afghanistan labeled. The river's path is highlighted in blue, and major international boundaries are marked. — Brahmaputra River Brahmaputra River.

The Brahmaputra River is a primary contributor to the formation of the Ganges-Brahmaputra delta through its massive transport of sediment and water discharge.12

The river system carries the world’s highest combined suspended sediment load, totaling approximately 1.84 billion tons per year, with the Brahmaputra alone supplying a significant portion of the water discharge for the combined system. As the Brahmaputra (known as the Jamuna in Bangladesh) joins the Ganges to form the Padma, these combined waters flow toward the Bay of Bengal, depositing vast amounts of silt and sand.12

This sediment deposition creates the delta, which is characterized by the constant formation of new lands, such as chars (riverine islands and deposits), and the seaward prolongation of the river valleys. While the growth of the delta is dominated by tidal processes, the active, sediment-laden channels of the Brahmaputra and Ganges are essential to its ongoing development and physical structure.321