The flood having a 1 percent average probability of being equaled or exceeded in a given year at a designated location. It may occur in any year or even in successive years if the hydrologic conditions are conducive for flooding. Also see Hundred-Year Flood, X-Year Flood, and X-Year Flood, Y-Duration Rain.
BASE FLOOD (100-YEAR FLOOD)
Meaning of BASE FLOOD (100-YEAR FLOOD) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012