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<br />. <br /> <br />. <br /> <br />I, <br /> <br />. <br /> <br />CONTENTS <br /> <br />Page <br /> <br />Preface ___nn_______ ~___nn__u___n_u___ III <br />Abstract _____n__________.________u_nnn_ 1 <br />Introduction ______n________________________ 1 <br />Procedure for flaoa peaks ____________________ 2 <br />Index-flood method ______________________ 2 <br />Multiple-regression method ______n_n__u 2 <br />Regionalization of characteristics of the <br />frequency distribution n___________uu 6 <br />Use of short records on small streams_____ 7 <br />Defining the flow characteristic __________ 7 <br />Model and parameters _________ __________ 9 <br />Reliability of a regionalization ____________ 11 <br /> <br />Page <br /> <br />Regionalizing flood stages ___________________ 11 <br />Procedures for other flow characteristics_______ 12 <br />Regionalizing draft-storage relations _________ 13 <br />Alternatives to regionalization _______________ 13 <br />Channel.geometry method _______________ 13 <br />Mean flow from monthly measurements____ 13 <br />Defining mean runoff by elevation zones____ 13 <br />Low-flow characteristics from base-flow <br />measurements __n_n_n____nn__nn 14 <br /> <br />References _________________________________ 14 <br /> <br />FIGURES <br /> <br />Page <br /> <br />1. Graphical analysis of data from table 1 _______________________________n___ <br />2. Map of Snohomish River stream system showing location of gaging stations <br />listed in table 1 _________________________________________________n____n <br />3. Plot of computed floods for hypothetical basins ___n_______n______n_______ <br />4. Graphical regression of 10-year floods defined from short records, <br />Kootenai River basin, Montana ____________________________________________ <br /> <br />4 <br /> <br />5 <br />6 <br /> <br />8 <br /> <br />TABLES <br /> <br />Pag. <br />1. Data from Snohomish River basin, Washington ________________________n___ 3 <br />2. Independent variables used in 10 regional flood-frequency analyses____________ 10 <br /> <br />v <br />