floodplain
floodplain. Land that is subject to floodwaters because of its level topography and proximity to a river or arroyo; esp., level land that, extending from a riverbank, is inundated when the flow of water exceeds the channel’s capacity.
floodplain. Land that is subject to floodwaters because of its level topography and proximity to a river or arroyo; esp., level land that, extending from a riverbank, is inundated when the flow of water exceeds the channel’s capacity.