Wave dominated deltas
In almost 80% of the world’s river deltas, waves are the dominant force. These deltas have the deltaic shape that has given deltas their name. The sediment that is carried into the delta is subsequently pushed back again by waves, creating a smooth coastline.
Most of these wave-dominated river deltas are relatively small, however. The traditional deltaic shape may be the most common, but the discharge from the rivers of these deltas is only 16% of all river discharges into the seas.