Delta

A triangular-shaped area of sediment deposited at the mouth of a river, where it meets a body of water such as a sea or ocean.

A delta refers to the landform created by the depositing of sediment carried by a river as the flow velocity decreases upon entering a larger body of water, such as a sea or ocean. This process forms a fan-shaped or triangular area of land, which can extend into the water body. Deltas are typically characterised by their rich, fertile soil, making them important agricultural regions, but they also play a significant role in marine navigation and ecosystems. The sediment deposited in a delta can create shallow waters, sandbars, and islands, posing challenges for ships and other vessels navigating the area. Over time, deltas can shift and change shape due to the continuous deposition of sediment and the influence of tides, currents, and waves. The Nile Delta and the Mississippi River Delta are two well-known examples of this landform. In addition to their geographical significance, deltas are essential for supporting diverse marine life, as they often serve as nurseries for fish and other aquatic species.