Federal Emergency Management Agency

Fluvial Geomorphology; the study of a stream’s interactions with the local climate, geology, topography, vegetation, and land use; the study of how a river carves its channel within its landscape

waterborne waste material and debris (e.g., plastics, polystyrene, paper) that float at or below the water surface

a temporary condition of partial or complete inundation of land areas from the overflow of streams, rivers, and other waters

any land area susceptible to inundation by water from any natural source or delineated by applicable Federal Emergency Management Agency maps and studies as being a special flood hazard area

of or relating to flowing waters, especially rivers