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<br />.. <br /> <br />-. <br /> <br />COMPUTER MODELS FOR RAINFALL-RUNOFF <br />AND RIVER HYDRAULIC ANALYSIS1 <br /> <br />by <br />Darryl W. Davis2 <br /> <br />INTRODUCTION <br /> <br />The applicati~n of computer technology to analysis of the rainfall- <br /> <br />runoff process and the hydraulics of natural rivers has greatly expanded <br /> <br />in the past few years. A large number of special purpose programs and <br /> <br />a few programs designed for general application have been developed and <br /> <br />applied to hydrologic engineering problems. The Hydrologic Engineering <br /> <br />Center (HE C) has developed, over the past 8 years, a number of generalized <br /> <br />computer programs for use by the US Army Corps of Engineers in analyzing <br /> <br />hydrologic engineering problems. This paper briefly describes the <br /> <br />activities of The Hydrologic Engineering Center and discusses the capa- <br /> <br />bilities of two of these programs: (1) Flood Hydrograph Package (HEC-l) <br /> <br />and (2) Water Surface Profiles (HEC-2), <br /> <br />THE HYDROLOGIC ENGINEERING CENTER <br /> <br />The Hydrologic Engineering Center, established in 1964, has three <br /> <br />principal missions: (a) conduct research and development of hydrologic <br /> <br />engineering techniques for use in the Corps' day-to-day work, (b) provide <br /> <br />training for Corps of Engineers employees in traditional as well as newly <br /> <br />" <br /> <br />lFor presentation at the Spring 1973 Conference of the Civil Engineering <br />Program Applications (CEPA) Conference, San Francisco, California <br /> <br />2Civil Engineer, The Hydrologic Engineering Center, Davis, California <br />