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<br />PREFACE <br /> <br />The work described in this report was performed under contract COT-FH-ll-7806, <br />entitled "Urban Storm Runoff Inlet Hydrograph Study" between the Federal Highway <br />Administration and Utah State University, This research contract aimed at the develop- <br />ment of an accurate design method for computing inlet hydrographs of surface runoff <br />under intense rainstorms on urban highways. One of the major tasks in this research project <br />was the development of synthetic (design) storms for highway runoff study. Available <br />rainstorm models and rainfall data were reviewed extensively and the most comprehensive <br />technique was developed to compute the values of the rainstorm model parameters which <br />characterize the storm pattern. <br /> <br />The research was conducted under the general supervision of Dr, Cheng.lung Chen, <br />Professor of Civil and Environmental Engineering at Utah State University, During this <br />study, several students helped analyze rainfall data obtained from the U.S. Weather Bureau <br />Technical Paper Nos. 25 and 40, NOAA Atlas 2, ARS Black Book Series, and field <br />measurements on two urban highway watersheds in the Salt Lake City area, <br /> <br />The contract was monitored by Dr. D. C. Woo, Contract Manager, Environmental <br />Design and Control Division, Federal Highway Administration, The author is indebted to <br />him for his ideas to initiate this study and overall research plan, detailed discussions of <br />research conduct of all phases, and critical reviews and comments of the results during the <br />course of the work. <br /> <br />This volume is the fourth in a series. The others in the series are: <br /> <br />Vol. <br />No. <br /> <br />Title <br /> <br />UWRL <br />Report No. <br />PRWG106-1 <br /> <br />2 <br /> <br />Computer Analysis of Runoff from Urban Highway Watersheds Under <br />Time~ and Space-Varying Rainstorms <br /> <br />laboratory Studies of the Resistance Coefficient for Sheet Flows over <br />Natural Turf Surfaces <br /> <br />Hydrologic Data for Two Urban Highway Watersheds in the Salt lake <br />City Area, Utah <br /> <br />Soil-Cover-Moisture Compiex: Analysis of Parametric Infiltration <br />Models for Highway Sideslopes <br /> <br />PRWG106-2 <br /> <br />3 <br /> <br />PRWGI06-3 <br /> <br />5 <br /> <br />PRWG106-5 <br /> <br />v <br />