open channel hydraulics

 open channel hydraulics

open channel hydraulics

Given the continuing escalation of flooding problems related to extreme hydrologic events caused by climate change, this third edition of the book adds significant new material related to stormwater management. New topics include design of street gutters, storm sewer inlets, stormwater detention basins with multilevel outlet structures, culvert energy dissipation structures, and culverts that accommodate aquatic organism passage.

In addition, there is expanded coverage of grass waterway
design, floodplain mapping, floodway delineation, and dam-break flood routing. These topics are directed toward practicing engineers as well as to advanced undergraduate and first-year graduate students in engineering. The presentation is facilitated by a number of new design examples as well as the use of the public domain programs HEC-RAS (U.S. Army Corps of Engineers) and HY-8 (Federal Highway Administration). In the chapter on flow in alluvial channels, a new section on stream restoration has been added, and the coverage of bridge pier and abutment scour has been updated.

In previous editions, computer programs written in Visual Basic 6 (VB6) were provided to illustrate numerical solution techniques for open channel hydraulics problems and to provide interactive learning tools. In this third edition of the book, these programs have been translated into MATLAB, which is a language platform that is being widely used to teach numerical methods to engineering students. MATLAB can be integrated into many other programming languages, and apps can be developed with a graphical user interface. This edition includes several MATLAB programs in an appendix on the book website, including computation of critical depth in compound channels, water surface profile computation in prismatic trapezoidal channels, and numerical solution of the unsteady flow problems of hydroelectric load acceptance and rejection, and hydraulic flood routing, using the method of characteristics.

In addition to the basic MATLAB code, standalone executable versions of the programs are provided with a graphical user interface. These programs are intended to be interactive learning tools to enhance understanding of open channel hydraulics principles.

In this edition, Chapter 11 on computational fluid dynamics (CFD) has been updated by my former Georgia Tech colleague, Dr. Thorsten Stoesser, now at University College London. Three-dimensional CFD techniques with treatment of turbulence using large eddy simulation (LES) techniques have become important tools in solution of open channel hydraulics problems such as flow through bridge constrictions, stream restoration, floodplain management, and advanced studies of hydraulic structures.
In this chapter, LES model results for shallow open channel flow over large roughness elements have been added to provide new understanding of the contribution of turbulence to form resistance and water surface deformation.

Regardless of whether new students of open channel flow are college students or practicing engineers,end-of-chapter exercises and supplementary learning materials are an essential part of the learning process. To this end, the number of end-of-chapter exercises has been increased in this edition by 22 percent, and the number of design example problems has been increased by 30 percent in the areas of flood and stormwater management. In addition, several summary PowerPoint presentations have been
added to the book website for students and instructors alike.

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