Associated floodways and contiguous floodplain areas are those shoreland areas located along a stream system or coastal shoreline that are subject to inundation during flood events. A floodway is the area of a river valley where floodwaters are regularly carried during periods of flooding. It includes all active and inactive stream channels, as well as lands along a stream, that are necessary to contain more rapidly moving currents and most of the water volume of a flood event.
Floodplains include all lands along a river or stream that may be
subject to periodic inundation by overflow from the base flood of that
river or stream.