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Exceedence Frequency per 100 Years = M N f 1 P'lf)')3' u t.J 1. .~, '. (d . February 1967 HIGH-FLOW VOLUME-FREQUENCY CRUVES FOR SELEm'ED DURATIONS General. This collection of high-flow volume-frequency curves for eight durations has been developed as background information for use in the multi-agency Comprehensive Basin Planning study for the Missouri Basin, The present volume contains curves for stations listed in the following table; eight other volumes present similar curves for about 500 additional stations located in the remaining sub-basins being considered in the framework study, Acknowledgements, The points were plotted and the curves were drawn by the Gal-Camp plotter of the Kansas City District, utilizing the RCA 301 computer and a program prepared by 0, E, Haggard of the District, Basic streamflow data were taken from the computer tapes prepared by the U, S. Geological Survey and the Corps of Engineers in connection with preparation of the Comprehensive Basin Planning report series on "Streamflow Characteristics, Flow-Duration, High-now, and Low-Flow Tables for Selected Stations through 1963," Analysis, The points plotted for each duration for each station were based on the formula normally used by the USGS where: Recurrence Interval in Years . N t 1 M OR: N = Number of years of record M = Order of magnitude (rank) of event The frequency curves drawn through the plotted points were based on fitting the Pearson Type III function by use of moments of flow loga- rithms in accordance with the procedure developed by L, R, Beard, Hydrologic Engineering Center, Sacramento District, Corps of Engineers, The first two moments (mean logarithm and standard deviation) were based on data from each individual station, The third moment (skew) was based on average skew coefficients developed by the Washington District, Corps of Engineers, as follows: .