floodplain
nounUK /ˈflʌd.pleɪn/
US /ˈflʌd.pleɪn/
A floodplain is flat land next to a river that sometimes gets covered with water when the river rises.
The village sits on a wide floodplain beside the river.
OTHER MEANINGS
2. An area of land built up by sediment deposited by a river over many years.
Rich soil on the floodplain makes it good farmland.
3. A region at risk of flooding during heavy rain or storms.
Houses on the floodplain were evacuated before the storm.
4. In ecology, a habitat that depends on periodic flooding for nutrients and wildlife.
Many birds nest on the floodplain each spring.