100-year FloodA statistic that indicates the magnitude of flood which can be expected to occur on average with a frequency of once every 100 years at a given
point or reach on a river. The 100-year flood is usually developed from a statistical distribution that is based on historical floods.
This is also called a base flood.100-year Flood PlainThe flood plain that would be inundated in the event of a 100-year flood.
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