a quantitative or qualitative description of the likelihood that a specified event will occur. The likelihood of occurrence of flooding can be measured in terms of Annual Exceedance Probability (AEP) or Average Recurrence Interval (ARI)
Australian Government, State Government (Victoria), Victoria State Emergency Service SES, Flood Victoria, Glossary and Abbreviations, Victoria, Australia 2012. http://www.floodvictoria.vic.gov.au/centric/learn_ about_flooding/glossary_and_abbreviations/glossary _of_terms.jsp, (ND Emr/ Flood - Brit) {906}