A 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.
- Browse Related Terms: 100-year Flood, 100-year Flood Plain, Base Flood, Channel Routing, DNSTRM, Flood Frequency Curve, Flood Plain, Flood routing, Floodway, Lag, Lakeshore Flood Advisory, Lakeshore Flood Watch, Lakeshore Flooding, routing, Travel Time