810 - Bulletin 17C: Updated Federal Guidelines for Flood Frequency Analysis - John England
Thursday, June 7
8:30 AM - 12:00 PM
Location: Lakeshore A
Want to know where the 1-percent probability flood comes from? Flood-frequency analysis of peak streamflow records provides the essential hydrologic input for estimating flood risk and for floodplain mapping. This short course will provide an overview and refresher on flood-frequency analysis of peak streamflow data, as well as introduce the new methods adopted in the new federal guidelines, Bulletin 17C. These new methods include a generalized method-of-moments estimator denoted the Expected Moments Algorithm (EMA) and a generalized version of the Grubbs-Beck test (MGBT) for the identification of potentially influential low floods. Participants will learn the new methods, how to properly characterize flood peaks for inclusion in a Bulletin 17C analysis, and how to interpret output from a flood frequency analysis. Flood frequency examples will be demonstrated using the latest versions of USGS PeakFQ and USACE HEC-SSP software.