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TeachMeFinance.com - explain Designated frequency flood Designated frequency flood The term 'Designated frequency flood' as it applies to the area of reclamation can be defined as ' Refers to the probability that a flood will occur in a given year. A 100-year flood is often considered in the design of diversion dams and for diversion-during-construction requirements. Service spillways, stilling basins, and some outlet works components may also be designed to pass certain level of floods designated by a return period. The return period should be thought as the chance that such a flood will be equaled or exceeded in any one year. For example, the 100-year flood is the flow level with a 0.01 annual exceedance probability, or there is 1 chance in 100 that this flood flow level will be equaled or exceeded in any given year'. Previous 5 Terms: design wave Design wind Designated Code Set Designated Data Content Committee Or Designated Dcc Designated floodway Next 5 Terms: Designated Standard Designated Standard Maintenance Organization Designated uses of water Design-basis accident Design-basis phenomena About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.