New research: Study explores uncertainties in flood risk estimates
Flood frequency analysis is a technique used to estimate flood risk, providing statistics such as the “100-year flood” or “500-year flood” that are critical to infrastructure design, dam safety analysis, and flood mapping in flood-prone areas. But the method used to calculate these flood frequencies is due for an update, according to a new study by scientists from DRI, University of Wisconsin-Madison, and Colorado State University. Floods, even in a single watershed, are known to be caused by a variety of sources, including rainfall, snowmelt, or “rain-on-snow” events in which rain falls on existing snowpack.
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