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Association of State Flood Plain Managers Association of State Flood Plain Managers
Association of State Flood Plain Managers
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USGS Publishes Bulletin 17C, “Guidelines for Determining Flood Flow Frequency”
Monday, April 2, 2018

Accurate estimates of flood frequency and magnitude are a key component of any effective nationwide flood risk management and flood damage abatement program. In addition to accuracy, methods for estimating flood risk must be uniformly and consistently applied because management of the nation's water and related land resources is a collaborative effort involving multiple actors, including most levels of government and the private sector. Bulletin 17C's Chapter B5 of book 4 (TM 4–B5) deals with flood flow frequency analysis at gaged sites using the Expected Moments Algorithm. The use of extreme flood data represented by interval and censored data types, including historical, paleoflood and botanical evidence, is emphasized.






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