"A map showing areas that would be affected by flooding from releases from a dam’s reservoir. The flooding may be from either controlled or uncontrolled releases or as a result of a dam failure. A series of maps for a dam could show the incremental areas flooded by larger flood releases." (U.S. Geological Survey, 2019)
U.S. Department of Homeland Security, Federal Emergency Management Agency. Federal Guidelines for Dam Safety, Glossary of Terms. 2004.