Scour Technology

Overview

Structures built in or near rivers and other channels can be vulnerable to scour around their foundations. If the depth of the scour becomes significant, the stability of the foundations may be endangered, with a consequent risk of damage or failure of the structure. There have been several bridge failures, resulting in transport disruption, economic loss and, on occasion, loss of life. The factors influencing scour are complex and vary according to the type of structure. Protection for preventing scour needs to be designed to withstand the flow forces imposed on them and have to be practical to build and install, while minimizing adverse environmental effects. This book covers the entire Scour Technology area and is prepared by one of the leading experts on the subject.

Table of contents

Chapter 1: Scour Management Challenges
Chapter 2: Engineering Judgment
Chapter 3: Scour Processes
Chapter 4: Material and Fluid Properties
Chapter 5: Erosive Capacity of Water
Chapter 6: Scour Thresholds
Chapter 7: Scour Extent
Chapter 8: Temporal Aspects of Scour
Chapter 9: Engineering Management of Scour
Chapter 10: Case Studies
REFERENCES
SYMBOLS
INDEX

Biographical note

George W. Annandale, D.Ing., P.E., is an internationally known expert on scour and president of Engineering and Hydrosystems, Inc. A civil engineer with 30 years' experience, he has worked on projects involving fluvial hydraulics, sediment transport, scour and sedimentation, and hydrology and hydraulics. He is the developer of the Erodibility Index Method used to assess scour on major projects around the world, including the San Roque Dam in the Philippines, the Karahnjukar Hydroelectric Project in Iceland, and the new Woodrow Wilson Bridge in the United States. His method has also been incorporated into federal and state guidelines, including those of the Federal Energy Regulatory Commission, U.S. Bureau of Reclamation, Colorado Department of Transportation, and Federal Highway Administration. Dr. Annandale has worked on projects on five continents and speaks English, German, and Afrikaans. He is author or contributing author to six books and close to 100 papers. He lives in Denver, Colorado.

Back cover copy

INSIGHTFUL SOLUTION OF PRACTICAL SCOUR PROBLEMS

Prepared by one of the world's foremost experts in scour, this text provides the information engineers need to make and justify decisions to protect infrastructure against the effects of scour. Scour Technology steers away from the empiricism that has prevented engineers from developing the necessary understanding to make justifiable and defensible design decisions. George W. Annandale's unique approach to analyzing scour from a cause-and-effect point of view has stimulated research at leading institutions. These practical methods allow analysis of scour in any kind of earth or engineered earth material, including materials such as vegetated soils, rock, and concrete. Dr. Annandale's methods are used internationally by practicing engineers to analyze and solve scour problems at bridges subject to flowing water, at dams subject to overtopping, in spillway chutes and energy dissipaters, and in plunge pools and water-bearing tunnels, and to develop engineering specifications for vegetated erosion protection of soils subject to the scour effects of flowing water.

This text untangles the complex factors influencing scour and its action on all types of materials. Covering the entire field, Scour Technology offers:
In-depth understanding of the interaction between turbulent flow and all earth materials, and how this interaction leads to scour
Methods for assessing the scour resistance of any earth or engineered earth material
Methods for quantifying the erosive capacity of water for diverse flow conditions
Methods for quantifying the extent and temporal aspects of scour
Design approaches for developing effective protection against the effects of scour
Examples of practical application of the methods, illustrated by case studies

Understand and Protect
Scour Management Challenges * Engineering Judgment * Scour Processes * Material and Fluid Properties * Erosive Capacity of Water * Scour Thresholds * Scour Extent * Temporal Aspects of Scour * Engineering Management of Scour * Case Studies