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Graphics Advances Aid Flood Engineers

by Brian M. Reich,
Kenneth G. Renard,



Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H?AL)

Abstract:

In the last decade options have been suggested to the Log-Pearson III (LP3) computation for predicting design flood behavior in semi-arid conditions. Observations from an ongoing study of seven watersheds are presented. Areas ranged from 25 to 3,200 sq. mi., with record lengths from 40 through 73 years. Computer graphics on log-normal (LN), extreme value (EV), and log-extreme value (LEV), along with mathematical estimates for 10- and 100-year floods, are presented. Differences between the behavior of the largest 1/5 of annual floods, from more frequent annual maxima, are illustrated.

Subject Headings: Floods | Graphic methods | Watersheds | Probability distribution | Hydraulic design | Flood frequency | Arid lands

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