The purpose of this book is to present the theory of the steady flow of water in open channels in concise form, suitable for use in senior and first-year graduate courses, and for home study by young engineers who wish to improve their knowledge of this branch of hydrauHcs. It is hoped that the book will also prove useful to practicing engmeers who have to make computations involving open-channel flow. The tables are unusually complete and up to date, and are so arranged that they can be used with a minimum of reference to the text. A knowledge of elementary hydraulics is presupposed. Much of the basic subject matter appears in a form nearly identical with that in which it appeared in the Technical Reports of the Miami Conservancy District, under authorship of the senior author. Thanks are due the District for permission to use this material, for which no adequate substitute has been found. The uniform-flow tables and the table of Bresse's function are taken from the open-channel tables of the Iowa Institute of Hydraulic Research, which were computed under the direction of the junior author. Thanks are due the Institute for permitting the inclusion of these tables. A number of different methods of computing backwater curves are described, each possessing marked advantages in application to certain types of problems. A new feature is emphasis upon the analysis of the flow profiles to be expected under different conditions of channel shape and grade, rather than upon examples of situations in which different types of profiles will form. The latter type of treatment, which has predominated in the literature, is of little direct use to the practicing engineer. The text does not include a complete and exhaustive treatment of the subject, about which much yet remains to be known. On the other hand, certain related topics, not strictly within the scope defined by the title, are discussed. There is a chapter on the moving hydraulic jump. Another, on slowly varied flow, embraces the type of routing problems that can be treated as steady flow if the changes are taken into account in writing the equation of continuity. The first half of the book contains much material accumulated throughout the life work of the senior author; the last half is primarily the work of the junior author. VI PREFACE Professor E. W. Lane assisted in the preparation of Chapter IX and read the entire manuscript, giving much valuable advice. Mr. J. C. Stevens read the manuscript and made many worthwhile suggestions. The late Professor Floyd A. Nagler and the late David L. Yarnell assisted in the development of some of the subject matter that appears here for the first time. In the course of classroom discussion many of the authors' students have made contributions which are incorporated in the text. To all who have helped directly, and to the many contributors to the literature whose efforts have been drawn upon, the authors wish to express their sincere appreciation. Finally, they wish to thank the staff of John Wiley and Sons for its fine cooperati...

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