The Ganges-Brahmaputra delta is the world's largest delta, covering most of Bangladesh and the state of West Bengal (India). The size of the delta is a reflection of the enormous input of sediment being washed off the still-growing Himalayan mountains into the Ganges river basin.
The Nile delta (shaped by waves from the Mediterranean Sea) and Senegal delta (shaped by waves from the Atlantic Ocean) are both wave-dominated deltas. Tide-dominated deltas usually form in areas with a large tidal range, or area between high tide and low tide.
For 7,000 years, the Mississippi River has snaked across southern Louisiana, depositing sediment from 31 states and 2 Canadian provinces across its delta. As sediment accumulated under water, plant communities began to develop, trapping more sediment and building land.
The Mississippi River Delta, the largest in the U.S., is a melange of the rivershed and its associated river and streambeds, farmland, urbanized areas, lakes, and estuaries.