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Numerical Simulation of Flow and Suspended Sediment Transport in the Distributary Channel Networks

Author

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  • Wei Zhang
  • Qiong Jia
  • Xiaowen Chen

Abstract

Flow and suspended sediment transport in distributary channel networks play an important role in the evolution of deltas and estuaries, as well as the coastal environment. In this study, a 1D flow and suspended sediment transport model is presented to simulate the hydrodynamics and suspended sediment transport in the distributary channel networks. The governing equations for river flow are the Saint-Venant equations and for suspended sediment transport are the nonequilibrium transport equations. The procedure of solving the governing equations is firstly to get the matrix form of the water level and suspended sediment concentration at all connected junctions by utilizing the transformation of the governing equations of the single channel. Secondly, the water level and suspended sediment concentration at all junctions can be obtained by solving these irregular spare matrix equations. Finally, the water level, discharge, and suspended sediment concentration at each river section can be calculated. The presented 1D flow and suspended sediment transport model has been applied to the Pearl River networks and can reproduce water levels, discharges, and suspended sediment concentration with good accuracy, indicating this that model can be used to simulate the hydrodynamics and suspended sediment concentration in the distributary channel networks.

Suggested Citation

  • Wei Zhang & Qiong Jia & Xiaowen Chen, 2014. "Numerical Simulation of Flow and Suspended Sediment Transport in the Distributary Channel Networks," Journal of Applied Mathematics, Hindawi, vol. 2014, pages 1-9, April.
    • Handle: RePEc:hin:jnljam:948731
    DOI: 10.1155/2014/948731
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