River Mechanics (eBook)

Front Cover 1
River Mechanics 4
Copyright Page 5
Table of Contents 6
PREFACE 10
LIST OF RELEVANT SYMBOLS 12
CHAPTER 1. FUNDAMENTALS 18
1.1 Width-to-Depth Ratio of a River 18
1.2 Dimensional Methods 20
1.3 Two-Phase Motion and its Dimensionless Variables 22
1.4 Mechanical Properties of Flow 25
1.5 Sediment Transport 32
1.6 Granular Skin Roughness 38
1.7 Transport Continuity Equation 40
1.8 Data-Plots 43
References 44
CHAPTER 2. TURBULENCE 46
2.1 Bursting Processes 46
2.2 Turbulence Scales 53
2.3 Horizontal Turbulence 63
References 77
CHAPTER 3. BED FORMS AND FRICTION FACTOR 80
3.1 Classification of Bed Forms 80
3.2 Formation of Bed Forms 87
3.3 Steepness of Bed Forms 96
3.4 Existence Regions of Bed Forms 103
3.5 Experimental Data and Bed Form Equations 108
3.6 Friction Factor 121
References 129
References B Sources of Bar Data 132
References C Sources of Friction Factor Data 133
CHAPTER 4. REGIME CHANNELS 134
PART I 134
4.1 Regime Concept 134
4.2 Extremal (or Rational) Methods 136
4.3 Dimensionless Formulation of the Regime Channel R 140
4.4 (Fr. min) — the Basis of Regime Development 145
4.5 Regime Equations 154
4.6 Computation of BR, hR and SR 161
4.7 Regime Channel Development 164
PART II 168
4.8 Regime Cross-Section 168
References 173
References A 175
References B 175
CHAPTER 5. MEANDERING AND BRAIDING 178
PART I: Meandering 178
5.1 Meander Geometry 178
5.2 Origin of Meanders 185
5.3 Meander Kinematics (schematical outline) 196
5.4 Meander Dynamics (schematical outline) 202
PART II: Braiding 219
5.5 Origin of Braiding 219
5.6 Development of Braiding 225
References 232
References A Sources of Meandering and Braiding River Data 234
SUBJECT INDEX 235