Why is the lower Padma River muddy?

The lower Padma River appears muddy because it carries a massive volume of silt. The Ganges-Brahmaputra river system, of which the Padma is a central channel, transports a combined suspended sediment load of approximately 1.84 billion tons per year, which is the highest in the world. This heavy sediment load is a defining characteristic of the river's waters as they flow through the delta region toward the Bay of Bengal.123