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Title: CHANNEL DESIGN AND FLOW ANALYSIS
Author: J.C.Y. Guo
Specifications: Softbound, 200 pp

ISBN-13: 978-1-887201-09-4
Price: US $95
Cat No: CDFA

This book emphasizes channel designs and channel performance evaluations. All examples are illustrated through the application of the computer software package. This software package not only gives technical information but is also a technical tool.

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DESCRIPTION **Also see (SDSD and UDINLET) by J.C.Y. Guo


This technical publication, with a computer software package, was developed by the author, in collaboration with the Urban Drainage and Flood Control District in Denver (City and County of Denver), Cities of Aurora and Littleton; Counties of Adams, Arapahoe, and Douglas, with the support of the University of Colorado at Denver, to provide step by step design procedures for various types of channel. The book begins with a review of open channel hydraulics including the uniform and critical flow concepts, and backwater profiles determined by step methods and their applications to designs of grass channels, riprap protection, concrete reach, channel transition, grade control by drops. Open channel hydraulics in a closed conduit are also illustrated by the designs of a culvert under a partially full or full flow condition.

Emphasis is on designs of urban flood channels using the concept of multiple design events. For a channel having a simple cross section, the duality theory was introduced to the optimization of hydraulic efficiency by either the least excavated channel area, or the maximum delivery capacity. For a channel with a composite cross section, the design procedures and equations were developed to size the low flow section and overflow bank areas on the floodplain. Designs of a trickle channel running through a constructed wetland or park area are also covered.
This book provides a theoretical review and numerical examples for illustrating a supercritical flow in curve channels. A two-step design procedure was developed in coping with surface waves including superelevation, cross waves, oblique jumps and roll waves. Design charts are also developed to assist engineers in selecting the proper channel cross sectional geometry in order to reduce or avoid roll waves on a steep slope, or cross waves in a curve reach. Although channels are sized according to peak design flow rates, the performance of a channel is to pass the entire hydrograph under a unsteady flow condition. Therefore, the kinematic wave routing schemes are also derived in this book with implicit and explicit numerical methods. Several hydrograph routing examples are illustrated for overland flows and channel flows as well.

About the software:

The computer software package is menu driven, including a graphical display and can be executed under Window 95™. It provides normal flow and critical flow conditions, and specific energy and force curves for rectangular, box, or triangular channels. In case of a circular or arch conduit, the program will determine the flowing full capacity and partially full condition for the design discharge. The computed water surface profiles for all types of channel shapes are tabulated to include all necessary flow variables such as specific energy and force for determining the location of hydraulic jump or drop.


TABLE OF CONTENTS [top]

CHAPTER 1• OPEN CHANNEL HYDRAULICS - A REVIEW
CLASSIFICATIONS OF CHANNELS
CHANNEL CROSS SECTION ELEMENTS
CLASSIFICATIONS OF OPEN CHANNEL FLOW
VELOCITY DISTRIBUTION
UNIFORM FLOW
ENERGY PRINCIPLE
MOMENTUM PRINCIPLE
CRITICAL FLOW


CHAPTER 2- STEADY VARIED FLOW
GRADUALLY VARIED FLOW
RAPIDLY VARIED FLOW
APPLICATIONS OF ENERGY PRINCIPLE
RISE AND DROP OF WATER SURFACE
Case 1. Water Surface Change due to An Abrupt Rise
Case 2. Water Surface Change due to An Abrupt Drop
Case 3. Determination of the Height of a Submerged Grade
Case 4. Determination of the Width of a Contraction
WATER SURFACE PROFILE COMPUTATIONS
Direct Step Method
Standard Step Method
APPLICATION OF SPECIFIC FORCE PRINCIPLE


CHAPTER 3 - CHANNEL DESIGN AND FLOW ANALYSIS
NATURAL CHANNEL
GRASS LINED CHANNEL
RIPRAP CHANNEL
CONCRETE-LINED CHANNEL
FREEBOARD
DROP STRUCTURE
INTRODUCTION OF THE COMPUTER MODEL- TPFLOW
CASE STUDIES
Example 3.1. Grade Control by a Drop on a Natural Drainageway
Example 3.2. Design of a Grass Channel
Example 3.3. Flow Analysis and Surface Profile Computations
Example 3.4. Design Example for Riprap Channel and Flow Analysis


CHAPTER 4 -COMPOSITE CHANNEL DESIGN AND FLOW ANALYSIS
COMPOSITE CHANNEL
TYPES OF COMPOSITE CHANNELS.
Low-Flow Channel
Trickle Channel
Wetland Channel
DETERMINATION OF ROUGHNESS COEFFICIENTS
CONVEYANCE AND FLOW ANALYSIS
Flow in the Main Channel
Flow in the Overbank Areas
DESIGN CRITERIA AND CONCERNS
INTRODUCTION TO THE COMPUTER MODEL COMPCH
CASE STUDY
Case 1. Design of a Low Flow Channel
Case 2. Floodplain Encroachment Analysis



CHAPTER 5- MOST EFFICIENT CHANNEL SECTIONS
DEFINITION
OPTIMAL TRAPEZOIDAL CHANNEL SECTION
OPTIMAL TRAPEZOIDAL CHANNEL WITHOUT A FREEBOARD
OPTIMAL RECTANGULAR CHANNEL WITH A FREEBOARD
OPTIMAL RECTANGULAR CHANNEL WITHOUT A FREEBOARD
INTRODUCTION TO THE BESTCH MODEL
DESIGN EXAMPLES
CHAPTER 6- CONDUIT HYDRAULICS
OPEN CHANNEL HYDRAULICS IN CONDUITS
CULVERT HYDRAULICS
INLET CONTROL CULVERT
Case 1. Culvert on a Steep Slope with Unsubmerged
Case 2. Culvert with High Headwater and Unsubmerged Exit
OUTLET CONTROL CULVERT
Case 1. Culvert with Both Entrance and Exit Submerged
Culvert on a Mild Slope with a Drop Exit
Culvert on a Mild Slope with an Unknown Tailwater
Culvert on Mild Slope with Known Tailwater
GENERAL CONSIDERATIONS FOR CULVERT DESIGN
INTRODUCTION TO THE PIFLOW MODEL
DESIGN EXAMPLES
Analysis of Outlet Control
Analysis of Inlet Control

Part Ill. Headwater Comparison between Inlet and Outlet Control

CHAPTER 7- CROSS WAVES IN HIGH GRADIENT CHANNELS
CHANNEL ROUGHNESS COEFFICIENT .
FREEBOARD AND CHANNEL DEPTH
SUPERELEVATION
LIMITING RADIUS OF THE CURVED REACH .
TRANSITION CURVES BETWEEN STRAIGHT REACH AND
CURVE REACH
Spiral Transition Curves
B. Spiral-banked Transition Curves
CROSS WAVES AT A BEND
OBLIQUE JUMP AT THE OUTER BANK AT A BEND
A. Determination of Channel Depths for the Straight Reaches
B. Channel Depths for the Outfall Reaches Near the Confluence
OBLIQUE DROP INDUCED BY THE INNER BANK AT A BEND
SIMPLIFIED SOLUTIONS OF CROSS WAVES THROUGH A
CASE STUDY

CHAPTER 8- ROLL WAVES IN HIGH GRADIENT CHANNELS
FLOW REGIMES
INSTABILITY OF CHANNEL FLOWS
HEIGHTS OF ROLL WAVES


CHAPTER 9- UNSTEADY OPEN CHANNEL FLOW
CONTINUITY PRINCIPLE
MOMENTUM PRINCIPLE
SLOPES
FLOOD WAVES AND KINEMATIC WAVES
GOVERNING EQUATIONS FOR KINEMATIC WAVES
KINEMATIC WAVE SOLUTIONS FOR OVERLAND FLOW
KINEMATIC WAVE NUMERICAL SCHEME FOR CHANNEL ROUTING


REFERENCES



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