266 pages | 55 Color Illus. | 100 B/W Illus.
A stream flowing in alluvium deforms its bed surface, forming ripples, dunes, bars, etc., and, in many instances, it deforms its channel entirely, thereby creating meandering or braiding patterns. It could be said that, in general, an alluvial stream and its deformable boundary undergo a variety of fluvial processes leading to the emergence of a multitude of alluvial forms.
This book concerns the physics and analytical treatment of various fluvial processes and the associated alluvial bed and plan forms listed above. Following an introductory chapter on the basics of turbulent flow and sediment transport, the book covers the origin, geometric characteristics and effects of bed forms, from small- to meso-scale (ripples, dunes, alternate and multiple bars); the initiation, geometry and mechanics of meandering streams; the computation of flow, bed deformation and the planimetric evolution of meandering streams; and braiding and delta formation. The book also covers the regime concept, the time-development of a stream towards its regime state, and the formulation of stable, or equilibrium, morphology. The book distinguishes itself by its comprehensive analysis and discussion of key processes involved in large-scale river morphodynamics.
The book was written primarily for researchers and graduate students of hydraulic engineering, water resources and related branches of earth sciences, but it will also prove useful for river engineers and managers.
"From fundamental hydraulic principles to recent finding on alluvial channel formation and evolution, this monograph thoroughly reviews the hydraulics, sediment characteristics, and engineering relationships that lead to our current understanding of fluvial processes and geomorphic features in the landscape. Unifying the pioneering work of professor Yalin with the contemporary research of professor da Silva, the revised monograph includes recent lab and theoretical advances in open channel hydraulics, coherent flow structures, resistance of bedforms, application of thermodynamic principles to alluvial systems, as well as the formation and maintenance of regime channels.
Professor da Silva takes on the many complex issues of open channel flow and presents them in an elegant and approachable manner, with mathematical relations and excellent illustrations that develop the respective topics. Given the vast experimental findings of the authors’ research, each chapter includes the authors’ perspective and remarks that range from pragmatic application of principles to theoretical specifics that should not be overlooked.
This is an excellent reference for graduate students, instructors, and active researchers in the fields of fluid mechanics, hydraulic engineering, sedimentation, and fluvial geomorphology that is applicable to experimental and field based research. The monograph includes thorough references to both previous findings in the literature as well as sources of data for a range of fluvial research topics. Additionally, each chapter contains thought provoking problem sets for educational applications. Overall, this monograph is a great library addition for anyone working in fluvial systems."
Dr. Andrew Tranmer, Research Assistant Professor at the Center for Ecohydraulic Research, University of Idaho
1.1 Sediment transport
1.2 Turbulent flow
1.3 Two-dimensional two-phase motion
1.4 Bed-load rate; Bagnold’s formula
1.5 Vector forms of the bed-load rate
1.6 Suspended-load rate
1.7 Sediment transport continuity equation
1.8 Additional remarks
2 Bed forms
2.2 Origin of bed forms
2.3 Geometry and existence regions of dunes and ripples
2.4 Geometry and existence regions of bars
2.5 Final remarks
3 Flow past undulated beds
3.1 Flow resistance factor
3.2 Sediment transport rate of flow past undulated bed
3.3 Mechanical structure of flow over dunes
4 Regime channels and their computation
4.2 Regime-channel defining parameters
4.3 Regime flow-width and depth
4.4 Determination of the regime minimization criterion
4.5 Computation of regime channels R
4.6 Other rational methods of computation of regime channels
4.7 Representative flow rate
5 Formation of regime channels; meandering and braiding
5.1 Meandering and regime development
5.2 Braiding and regime development
5.3 Time development of a single-channel stream
5.4 Large-scale bed forms and regime development
6 Geometry and mechanics of meandering streams
6.1 Channel-fitted coordinates
6.2 Sine-generated channels
6.3 Mechanics of meandering flows
6.4 Bed deformation
6.5 Resistance factor of meandering streams
6.6 Additional remarks
7 Meandering-related computations
7.1 Vertically-averaged flow in meandering channels
7.2 Bed deformation by a meandering flow
7.3 Migration and expansion of meander loops
Appendix A – Sources of dune and ripple data
Appendix B – Sources of bar data
Appendix C – Sources of friction factor data
Appendix D – Sources of regime data
Appendix E – Sources of meandering and braiding data
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