River Mechanics

by Yalin, M. Selim

• ISBN13: 9780080401904
• ISBN10: 0080401902
• Format: Hardcover
• Copyright: 1992-11-01
• Publisher: Elsevier Science Ltd

Summary

Understanding the mechanism and behaviour of rivers flowing in alluvium is a most challenging subject. The conditions presented by a natural river are far from simple: the flow varies with location and time, and the granular structure and cohesive properties of the alluvium are rarely homogeneous. River Mechanics addresses this subject and aims to improve the understanding and formulation of the fluvial processes which occur in rivers. Topics covered include the interpretation of turbulence in the light of recent advances in the field, and current thinking on the regime concept.

Table of Contents

Preface

List of Relevant Symbols

Fundamentals

Width-to-depth ratio of a river

Dimensional methods

Two-phase motion and its dimensionless variables

Mechanical properties of flow

Sediment transport

Granular skin roughness

Transport continuity equation

Data-plots

Turbulence

Bursting processes

Turbulence scales

Horizontal turbulence

Bed forms and friction factor

Classification of bed forms

Formation of bed forms

Steepness of bed forms

Existence regions of bed forms

Experimental data and bed form equations

Friction factor

References A: Sources of dune and ripple data

References B: Sources of bar data

References C: Sources of friction factor data

Regime channels

Regime concept

Extremal (or rational) methods

Dimensionless formulation of the regime channel R

(Fr [actual symbol not reproducible] min) - the basis of regime development

Regime equations

Computation of B[subscript R], h[subscript R] and S[subscript R]

Regime channel development

Regime cross-section

References A: Table 4.1

References B: Sources of data used for regime plots

Meandering and braiding

Meander geometry

Origin of meanders

Meander kinematics (schematical outline)

Meander dynamics (schematical outline)

Origin of braiding

Development of braiding

References A: Sources of meandering and braiding river data

Subject Index

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