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• In hydrologic terms, the national standard for floodplain management is the base, or one percent chance flood. This flood has at least one chance in 100 of occurring in any given year. It is also called a 100 year flood.

  NOAA National Weather Service - Cite This Source - This Definition
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  Cite Definition for Base Flood

  American Psychological Association (APA)

  Base Flood. (n.d.). National Weather Service Glossary. Retrieved March 21, 2023, from website: http://www.expertglossary.com/definition/base-flood.

  Chicago Manual of Style (CMS)

  Base Flood. www.weather.gov. National Weather Service Glossary. NOAA National Weather Service. http://www.expertglossary.com/definition/base-flood (accessed: March 21, 2023).

  Modern Language Association (MLA)

  "Base Flood." National Weather Service Glossary. NOAA National Weather Service. 21 March. 2023 http://www.expertglossary.com/definition/base-flood.

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