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FLOOD02408
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Last modified
1/25/2010 6:24:22 PM
Creation date
10/4/2006 10:52:40 PM
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Title
Design Hydrographs for Very Small Wathersheds from Rainfall
Date
7/1/1962
Prepared By
USDA Hydrograph Laboratory, Civil Engineering Section Colorado State University
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />;1 <br /> <br />I <br /> <br />I I <br />, <br /> <br />Chapter <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />2 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />3 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />CONTENTS <br /> <br />Page <br /> <br />CONTENTS <br /> <br />v <br /> <br />FIGURES <br /> <br />vii <br /> <br />TABLES ' <br /> <br />viii <br /> <br />ABSTRACT. <br /> <br />Ix <br /> <br />ACKNOWLEDGEMENTS <br /> <br />Ix <br /> <br />INTRODUCTION. <br /> <br />Objectives <br />Deline ations <br />Need for the Study. <br />Recent Related Studies <br /> <br />I <br />1 <br />3 <br />3 <br /> <br />MATHEMATICAL TECHNIQUES <br /> <br />5 <br /> <br />Hydrograph Model. . . . <br /> <br />5 <br /> <br />Equation and its integration. . . . . . . . . . . . . <br />Interchangeability of time parameters, G and m <br />Graphical determination of hydrograph parameters <br /> <br />5 <br />5 <br />5 <br /> <br />Statistical Parameters Describing Rainstorms. <br /> <br />8 <br /> <br />Mean time, 81 <br /> <br />8 <br /> <br />Standard deviation about mean time and skewness <br /> <br />8 <br /> <br />Multiple Linear Regression Analysis . <br /> <br />8 <br /> <br />Generalized procedure . . , . <br />Stepwise analysis . . . . . , . <br />Transformations for non-linear regression <br />Comparing the efficiency of different equations <br /> <br />8 <br />13 <br />13 <br />13 <br /> <br />ANALYSIS OF DATA . . . <br /> <br />14 <br /> <br />Hydrograph Fitting <br /> <br />14 <br /> <br />Total runoff considered rather than surface component <br />Separation of antecedent flow <br />Hydrograph peak, q .. <br />Runoff volume, W. ~ . . <br />Criteria of acceptance. . <br />Attempts to get good fits. <br /> <br />14 <br />14 <br />15 <br />15 <br />15 <br />15 <br /> <br />Parameters Considered as Independent Variables <br /> <br />18 <br /> <br />I) Topographic parameters . . . . . . . <br />IT) Design indices depicting land use and soils <br />lIT) Conventional rainfall parameters. <br />IV) Statistical rainfall parameters <br /> <br />18 <br />21 <br />22 <br />22 <br /> <br />Stepwise Linear Regression Analysis. <br /> <br />22 <br /> <br />v <br />
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