100-year flood definition

100-year flood means a flood that has a 1-percent or greater chance of recurring in any given year or a flood of a magnitude equaled or exceeded once in 100 years on the average over a significantly long period.
100-year flood means a flood that has a one percent chance of being equaled or exceeded in any given year.
100-year flood or "base flood" means a flood that has a one percent or less chance of recurring in any given year or a flood of a magnitude equaled or exceeded once in one hundred years on the average over a significantly long period.

More Definitions of 100-year flood

100-year flood means a flood, the magnitude of which has a one percent (1%) chance of being equaled or exceeded in any given year or which, on the average, will be equaled or exceeded at least once every one hundred (100) years.
100-year flood means the condition of flooding having a one percent chance of annual occurrence.
100-year flood means a flood that has a one-percent or greater chance of recurring in any given
100-year flood means the flood having a one per cent chance of being equaled or exceeded in magnitude in any given year.
100-year flood means a flood that has a 1-percent chance of recurring in any given year. Rainfall amounts for the 100-year flood can be found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html.
100-year flood means a statistical designation that there is a 1 in 100 chance that a flood of this intensity will occur at a particular geographical location during any year.
100-year flood means the flood having a one percent (1%) chance of being equaled or exceeded in any given year.