Diaphragm Wall (Membrane) : A sheet, thin zone, or facing made of an impervious material such as concrete, steel, wood, plastic, etc. See also: Core Wall
National Dam Safety Program, U.S. Department of Homeland Security Federal Emergency Management Agency Interagency Committee on Dam Safety, Federal Guidelines For Dam Safety: Glossary of Terms For Dam Safety (FEMA-148), Washington DC, USA 2004. http://www.damsafety.org/media/Documents/PDF/fema- 148.pdf, (Dam Sfty - Amer) {890}