Simulating Laboratory Braided Rivers with Bed-Load Sediment Transport
Abstract
:1. Introduction
2. Numerical Model and Test
2.1. Numerical Model
2.1.1. Governing Equations for Flow and Sediment Transport
2.1.2. Influence of Bed Slope and Secondary Flow
2.1.3. Areal Fraction and Sheltering Effect for Non-uniform Sediments
2.1.4. Bed Deformation and Multiple Bed Layers
2.2. Model Morphodynamic Test
3. Braided River Simulation
3.1. Model Setup
3.2. Morphodynamic Properties
3.2.1. River Evolution Processes and Phenomena
3.2.2. Properties of a Typical Braided River
3.2.3. Sensitivity Analysis
3.3. Statistical Characteristics
3.3.1. Braiding Intensity
3.3.2. State Space Plots
3.3.3. Transect Topography and Slope Frequency
4. Discussion and Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sand Groups | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Grain Size (mm) | 0.25 | 0.5 | 0.7 | 1.0 | 1.5 | 2.0 | 3.0 | 4.0 | 6.0 | 8.0 | ||||||||
Percentage (%) | 4.95 | 14.05 | 9.20 | 16.16 | 13.64 | 12.00 | 11.78 | 11.22 | 4.42 | 2.58 | ||||||||
Finer than (%) | 4.95 | 19.00 | 28.20 | 44.36 | 58.00 | 70.00 | 81.78 | 93.00 | 97.42 | 100.0 |
Parameters | Predicted River | Experimental River | ||||
---|---|---|---|---|---|---|
BIA | BIT | BIA/BIT | BIA | BIT | BIA/BIT | |
Exp. 7 | 1.1 | 2.6 | 0.35–0.5 | 1.1 | 2.8 | 0.3–0.5 |
Exp. 8 | 1.8 | 4.5 | 0.35–0.5 | 1.3 | 3.8 | 0.3–0.5 |
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Yang, H.; Lin, B.; Sun, J.; Huang, G. Simulating Laboratory Braided Rivers with Bed-Load Sediment Transport. Water 2017, 9, 686. https://doi.org/10.3390/w9090686
Yang H, Lin B, Sun J, Huang G. Simulating Laboratory Braided Rivers with Bed-Load Sediment Transport. Water. 2017; 9(9):686. https://doi.org/10.3390/w9090686
Chicago/Turabian StyleYang, Haiyan, Binliang Lin, Jian Sun, and Guoxian Huang. 2017. "Simulating Laboratory Braided Rivers with Bed-Load Sediment Transport" Water 9, no. 9: 686. https://doi.org/10.3390/w9090686