Ernest W Tollner - Open Channel Design: Fundamentals and Applications

1. Chapter 1
2. Chapter 2
3. Chapter 3
4. Chapter 4
5. Chapter 5
6. Chapter 6
7. Chapter 7
8. Chapter 8
9. Chapter 9
10. Chapter 10
11. Appendix A
12. Appendix D

1. Chapter 1
2. Chapter 2
3. Chapter 3
4. Chapter 4
5. Chapter 5
6. Chapter 6
7. Chapter 7
8. Chapter 8
9. Chapter 9
10. Chapter 10
11. Appendix B

Ernest W. Tollner

University of Georgia
Athens
GA, USA

This edition first published 2022
2022 John Wiley & Sons Ltd

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Library of Congress CataloginginPublication Data applied for

Hardback ISBN: 9781119664246

Cover Design: Wiley
Cover Image: E W Tollner

With many excellent texts on Open Channel Hydraulics and Sediment Transport, why is another book needed? Available texts represent excellent tools for graduate instruction. We stand on the shoulders of giants in the field such as V.T. Chow, H.A. Einstein, Jr., to mention only a few.

Undergraduates generally find the available books to be somewhat intimidating. Available texts tend not to have accessible supporting software. In a knowledge domain where most problems require iterative solutions, a need exists for software to fill a void, especially for undergraduates. The presentation of concepts in Open Channel hydraulics in available texts is more oriented to graduate students who have a solid knowledge of basic concepts.

This text supports a splitlevel class that is mostly undergraduate in composition. Planning for the book began just before the COVID19 pandemic. The move to online courses in response to the COVID19 pandemic caused many educators to rethink course delivery. Inclass and online education, in our experience, is most effective when content is delivered to undergraduates in modules sequentially build on the previously presented material. In our view, an online presentation stresses the need to be as sequential as possible because student interaction becomes more challenging than facetoface delivery.

Another guiding factor in the book organization was to present many design approaches for uniform flow as earlier as possible.. Graduate students also do extra work on topics related to nonuniform and nonsteady flows as the course continues.

A variety of Excel spreadsheets supports the concepts presented in each chapter. Public domain software examples (HECRAS and HY8) support advanced analyses. Students may expect to use these analyses in subsequent classes, such as capstone design, when applicable. Mathematica notebooks support selected theoretical analyses. The Mathematica notebooks are useful for graduate student analysis of more advanced concepts.

Chapter 10, covering alluvial transport processes, is written following a different approach compared to other chapters. Undergraduates could readily understand the incipient motion concepts and the design of channels using Shields type analysis. They could readily grasp selected regression approaches for sediment transport computation. On the other hand, graduate students could spend considerable time looking at the more advanced sediment transport and river mechanics aspects.

This text attempts to present a highly sequential course with affordable and challenging supporting software for undergraduate and graduate students. We leave advanced topics such as density currents, scour, and convectiondiffusion of pollutant constituents to other texts. Emphasis on 3D computational modeling is left to other books as well.

The author takes responsibility for the material presented. Please call my attention to any errors discovered. I look forward to learning about your experiences using the text and eagerly desire to hear suggestions for future improvements.

Ernest W. Tollner

I am grateful for the cando attitude of my parental family, who immigrated from northeastern Germany late in the 1800s. They were dedicated to the proposition that the virtues in the US Declaration of Independence enabled improving one's life compared to living on what bore resemblances to a feudal estate. The general farm and dairy background made possible by my parents, Ernest and Ruby Tollner, both now deceased, was of incalculable value to this undertaking. This view has sharpened as time passed.