A study of sediment transport modele in one-dimensional numerical channel network model

作者：Han Dong^*; Fang Hongwei; Chen Minghong; He Guojian; Bai Jing

来源：Chinese Journal of Theoretical and Applied Mechanics, 2011, 43(3): 476-481.

• Alluvial river
• Bed load
• Channel network models
• Computation costs
• Hydrodynamic calculation
• In-channels
• Jingjiang River-Dongting Lake region
• matrix
• Non-equilibrium sediment transport
• One-dimensional hydrodynamics and sediment transport channel network model
• Recursive methods
• Sediment transport model
• Suspended loads
• Three Gorges project

Hydrodynamics and sediment transport model are generally used to simulate the evolution of natural alluvial rivers. In this paper, an explicit recursive method for sediment transport in channel network is presented. Based on hydrodynamic calculation, the method can be used to directly calculate non-equilibrium sediment transport process, involving suspended load and bed-load gradation adjustments one by one node in each river. This method avoids solving the matrix of the relationship between first and last sections, which is popular in traditional methods. A one-dimensional mathematical model with the sediment transport method is applied to the Jingjiang River-Dongting Lake region in the Three Gorges Project. Results are greatly in accord with the actual measurement. Computation cost is reduced and high accuracy is obtained in the new method. Moreover, the differences among different models of suspended load diversion in the node are discussed in the paper.

• 出版日期2011
• 单位中国农业大学; 清华大学