Advertisement

Numerical Analysis on Impacts of the Project of North Branch Narrowing on Sediment Distribution at the North Branch in the Changjiang River Estuary

  • Guo ChuanshengEmail author
  • Tang Liqun
  • Wang Chonghao
  • Zhao Huiming
  • Wang Yuhai
  • Liu Dabin
Conference paper
  • 56 Downloads
Part of the Springer Water book series (SPWA)

Abstract

To analyze the effect of the project of North Branch Narrowing at Changjiang River on hydrodynamic and sediment transport, a 3D numerical model for Changjiang Estuary was established. The verification of the models shows that they are effectively for simulating tidal current and suspended sediment distribution. The model were then used to simulate the hydrodynamic and distribution of sediment after the north branch narrowing. The results show that, after the narrowing-project, the new shoreline direction conforms with the main current direction of tide, the characteristics of flooding and ebbing tide basically remains unchanged; the project narrows the estuary width of north branch. After the north branch narrowing, the channel and the mouth of the north branch would be narrowed significantly, and tide would be weakened and water level would also be reduced, and tide current would be increased due to the narrowing of channel in the north branch. The concentrations of suspended sediment in the north branch would be reduced along with the reduce of tide level and current speed. The concentrations of suspended sediment reduce 0 to −14.9% after the project construction. It has little impact on the tidal level, current speed and suspended sediment concentration in the south branch in the Changjiang River.

Keywords

Suspended sediment transport Tidal shear front Sediment siltation Tidal current Sediment Numerical modeling 

Notes

Acknowledgements

This research was supported financially by the National Key Research and Development Program of China (2018YFC0407503) and IWHR Research and Development Support Program (SE0145B142017). The author would like to thank FVCOM developer for the open access of the source code.

References

  1. Xie, L., Zhang, Z. K., Zhang, Y. F., Wang, Y. P., & Huang, X. J. (2013). Sedimentation and morphological changes at Yuantuojiao Point, estuary of the North Branch, Changjiang River. Acta Oceanologica Sinica, 32(2), 24–34.CrossRefGoogle Scholar
  2. Chen, C. S., Liu, H. D., & Robert, C. B. (2003). An unstructured grid, finite-volume, three-dimensional, primitive equations ocean model: Application to coastal ocean and estuaries. Journal of Atmospheric Oceanic Technology, 20(1), 159–186.CrossRefGoogle Scholar
  3. Pham, T. S., Larson, M., Hanson, H., et al. (2009). A numerical model of nearshore waves, currents and sediment transport. Coastal Engineering, 56(11–12), 1084–1096.Google Scholar
  4. Wang, Q., & Kang, H. (2015). A three-dimensional modeling of the morphological change in the Liaodong Bay. Frontiers of Earth Science, 9(3), 509–520.CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Guo Chuansheng
    • 1
    Email author
  • Tang Liqun
    • 1
  • Wang Chonghao
    • 1
  • Zhao Huiming
    • 1
  • Wang Yuhai
    • 1
  • Liu Dabin
    • 1
  1. 1.State Key Laboratory of Simulation and Regulation of Water Cycle in River BasinChina Institute of Water Resources and Hydropower ResearchBeijingPeople’s Republic of China

Personalised recommendations