ContentsChapter 3 Noncohesive Sediment Transport3.1 Introduction3.2 Incipient Motion3.2.1 Shear Stress Approach3.2.2 Velocity Approach3.3 Sediment Transport Functions3.3.1 Regime Approach3.3.2 Regression Approach3.3.3 Probabilistic Approach3.3.4 Deterministic Approach3.3.5 Stream Power Approach3.3.5.1 Bagnold's Approach3.3.5.2 Engelund and Hansen's Approach3.3.5.3 Ackers and White's Approach3.3.6 Unit Stream Power Approach3.3.7 Power Balance Approach3.3.8 Gravitational Power Approach3.4 Other Commonly Used Sediment Transport Functions3.4.1 Schoklitsch Bedload Formula3.4.2 Kalinske Bedload Formula3.4.3 Meyer-Peter and Miiller Formula3.4.4 Rottner Bedload Formula3.4.5 Einstein Bedload Formula3.4.6 Laursen Bed-Material Load Formula3.4.7 Colby Bed-Material Load Formula3.4.8 Einstein Bed-Material Load Formula3.4.9 Toffaleti Formula3.5 Fall Velocity3.6 Resistance to Flow3.6.1 Einstein's Method3.6.2 Engelund and Hansen's Method3.6.3 Yang's Method3.7 Nonequilibrium Sediment Transport3.8 Comparison and Selection of Sediment Transport Formulas3.8.1 Direct Comparisons with Measurements3.8.2 Comparison by Size Fraction3.8.3 Computer Model Simulation Comparison3.8.4 Selection of Sediment Transport Formulas3.8.4.1 Dimensionless Parameters3.8.4.2 Data Analysis3.8.4.3 Procedures for Selecting Sediment Transport Formulas3.9 Summary3.10 ReferencesChapter 3 Noncohesive Sediment Transport Page .......................................................................................................................... 3.1 Introduction 3-1 3.2 Incipient Motion ................................................................................................................... 3-1 3.2.1 Shear Stress Approach .............................................................................................. 3-2 3.2.2 Velocity Approach .................................................................................................... 3-7 ........................................................................................... 3.3 Sediment Transport Functions 3-12 3.3.1 Regime Approach ............................................................................................... 3-12 3.3.2 Regression Approach .............................................................................................. 3-14 .......................................................................................... 3.3.3 Probabilistic Approach 3-16 .......................................................................................... 3.3.4 Deterministic Approach 3-17 .......................................................................................... 3 3.5 Stream Power Approach 3-23 ................................................................................. 3.3.5.1 Bagnold's Approach 3-23 ........................................................... 3.3.5.2 Engelund and Hansen's Approach 3-25 ................................................................. 3.3.5.3 Ackers and White's Approach 3-25 3.3.6 Unit Stream Power Approach ................................................................................. 3-28 ........................................................................................ 3.3.7 Power Balance Approach 3-32 ................................................................................ 3.3.8 Gravitational Power Approach 3-34 ...................................................... 3.4 Other Commonly Used Sediment Transport Functions 3-36 3.4.1 Schoklitsch Bedload Formula ................................................................................. 3-36 3.4.2 Kalinske BedloadFormula .................................................................................. 3-37 ............................................................................ 3.4.3 Meyer-Peter and Miiller Formula 3-39 ........................................................................................ 3.4.4 Rottner Bedload Formula 3-40 ....................................................................................... 3.4.5 Einstein Bedload Formula 3-41 3.4.6 Laursen Bed-Material Load Formula .................................................................... 3-41 ......................................................................... 3.4.7 Colby Bed-Material Load Formula 3-42 3.4.8 Einstein Bed-Material Load Formula .................................................................... 3-44 3.4.9 Toffaleti Formula .................................................................................................... 3-44 3.5 Fall Velocity ....................................................................................................................... 3-45 ............................................................................................................. 3.6 Resistance to Flow 3-47 3.6.1 Einstein's Method ................................................................................................... 3-49 3.6.2 Engelund and Hansen's Method ............................................................................. 3-54 3.6.3 Yang's Method ................................................................................................... 3-58 3.7 Nonequilibrium Sediment Transport .................................................................................. 3-63 ............................................. 3.8 Comparison and Selection of Sediment Transport Formulas 3-63 3.8.1 Direct Comparisons with Measurements ................................................................. 3-64 3.8.2 Comparison by Size Fraction .................................................................................. 3-73 3.8.3 Computer Model Simulation Comparison ............................................................... 3-77 ........................................................... 3.8.4 Selection of Sediment Transport Formulas 3-83 ........................................................................ 3.8.4.1 Dimensionless Parameters 3-85 ........................................................................................... 3.8.4.2 Data Analysis 3-86 ......................... 3.8.4.3 Procedures for Selecting Sediment Transport Formulas 3-1 02 3.9 Summary .......................................................................................................................... 3- 104