Storage 15 : The volume of water stored in a basin or behind a dam - usually expressed in acre-feet. It differs from capacity, which is the volume of water stored at the emergency spillway elevation
The Flood Control District of Maricopa County, Glossary of Flooding Terms, AZ, USA 2009. http://www.fcd.maricopa.gov/Education/glossary.asp x, (ND/ Flood - Amer) {477}