the world's largest delta, at about 59,000 km 2  (23,000 sq mi). [3]  It stretches 322 km (200 mi) along the Bay of Bengal. [5] Only the  Amazon  and  Congo  rivers have a greater average discharge than the combined flow of the Ganges, the Brahmaputra, and the  Surma-Meghna river system . [5]  In full flood