floodplain
UK: ˈflʌdpleɪn | US: ˈflʌdpleɪn
n. a flat area of land adjacent to a river, formed by river sediments and subject to flooding.
The word "floodplain" combines "flood," derived from Old English flōd (meaning "a flowing of water"), and "plain," from Latin planus (meaning "flat"). The term emerged in the 18th century to describe low-lying land shaped by periodic river flooding. The logic is straightforward: "flood" denotes the water's action, while "plain" describes the resulting flat terrain. This compound reflects the landform's dependence on river dynamics.
Farmers often cultivate crops on the fertile soil of a floodplain.
The floodplain was submerged after heavy rains caused the river to overflow.
Urban development on floodplains can increase the risk of property damage.
Ecologists study floodplain ecosystems for their biodiversity.
The government implemented measures to protect homes built on the floodplain.