Contents
Contents
1Introduction1
1.1Research Background and Significance1
1.2State of the Art2
1.2.1Review of Bed Load Transport Measuring Method2
1.2.2Review of Bed Load Motion Characteristics5
1.2.3Review of WaterSediment Movement8
1.3Research Contents10
2Setups and Process12
2.1Setups12
2.1.1Flume12
2.1.2Sediment Transport Measurement System13
2.1.3Bed Surface Topography Measurement System14
2.1.4Water and Sediment Synchronization Measurment
System15
2.2Experimental Process and Data18
2.2.1Experimental Process18
2.2.2Experimental Data19
2.2.3Statistical Parameters of Bed Load Motion21
2.3Summary24
3Image Measurement Method of Bedload Motion25
3.1Applicability of Traditional Particle Tracking Methods25
3.2New Particle Tracking Method27
3.2.1Image Preprocessing and Subtraction27
3.2.2Particle Tracking29
3.2.3Global Connection32
3.3Validation of the New Method34
3.3.1Simulation Image Inspection34
3.3.2Real Image Inspection39
3.4Summary40
4Influence of Image Measurement Parameters on
Bedload Characteristics41
4.1Sampling Interval41
4.1.1Theoretical Analysis41
4.1.2“FlightRest” Model43
4.1.3Experimental Verification45
4.2Range of Image Measurement Parameters48
4.2.1Sampling Interval49
4.2.2Sampling Size and Duration49
4.2.3Sampling Area51
4.3Determination Bedload Motion Parameters54
4.4Summary55
5Characteristics of Uniform Bedload Movement57
5.1Number of Moving Particles58
5.1.1TimeAveraged Characteristics58
5.1.2PDFs61
5.1.3Entrainment Probability and Movement Probability63
5.2Velocity of Moving Particles66
5.2.1TimeAveraged Characteristics66
5.2.2PDFs68
5.3Flight Length and Duration of Moving Particles72
5.3.1TimeAveraged Characteristics72
5.3.2PDFs75
5.4Bed Load Transport Rate78
5.4.1TimeAveraged Characteristics78
5.4.2PDFs80
5.5Summary81
6Relationship Between Water and Sediment83
6.1Bed Surface Morphology and Bedload Transport83
6.1.1Bed Surface Morphology83
6.1.2Spatial Distribution of Bedload Motion Parameters86
6.1.3The Relationship Between Bed Surface Morphology
and Transport88
6.2Instantaneous Bedload Transport and Flow92
6.2.1Instantaneous Flow92
6.2.2Instantaneous Sediment96
6.2.3CrossCorrelation Between Water and Sediment99
6.3Summary102
7Conclusion and Prospect104
7.1Conclusion104
7.2Innovation106
7.3Prospect106
References108
Academic Papers and Research Results Published During the Study118