"Alluvial plain" refers to a low-lying area formed by the deposition of sediments from rivers or floods. Synonyms for this term include floodplain, river basin, delta, wetland, and floodway. These synonyms are interchangeable and can be used to describe any area that has been formed by the accumulation of soil and other materials that have been deposited by a flowing body of water. Floodplains and deltas are particularly common in coastal areas, where the interaction between the sea and the river plays a crucial role in forming these types of landscapes. Wetlands and floodways are often found in inland areas, where the movement of water is slower and more unpredictable. Regardless of their location, alluvial plains are important ecosystems that provide a range of environmental services, including water filtration, habitat for wildlife, and opportunities for recreation and tourism.