3D Numerical Simulation of Current and Sediment Transport in Estuary and Coast

Abstract:

In estuarine and coastal area, due to the colligated function of tide, runoff, wind and wave, suspended sediment profile in main flow direction varies from the inland river. Thus, combined with massive data sets from experiments in flume and observations in field, the study on the profile of concentration of suspended sediment are carried out in the thesis. Finally, 3D numerical model of turbulent sediment is established in estuarine and coastal area to carry out a simulation research on current and sediment movement in Yangtze River estuary.

• Periodical: Advanced Materials Research (Volumes 779-780)
• Pages: 899-902
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.779-780.899
• Online since: September 2013
• Authors: Xin Zhou Zhang, Xi Ping Dou, Xiao Dong Zhao, Xiang Ming Wang, Xiang Yu Gao
• Keywords: 3D Sediment Transport Simulation, Coastal Area, Estuary Area

References

[4] Analysis on Calculation Results.

[4] 1 Flow field analysis From the flow field of each layer at rising and falling tide (Fig. 4 and Fig. 5), in the area near the deep-water channel axis of north channel, the flow velocities at rising and falling tide are of small difference and the flow directions are opposite and consistent with the channel direction; however, in the protected area of spur dike, the flow velocity at rising tide is larger than that at falling tide and the flow directions at rising and falling tide form an included angle less than 180°. Fig. 4 The figure of flow field at rising tide (surface and bottom layer) Fig. 5 The figure of flow field at falling tide (surface and bottom layer).

DOI: 10.1007/978-3-642-41714-6_60190

[4] 2 Sediment concentration distribution analysis From the vertical changes of sediment concentration (Fig. 6), the bottom sediment concentration in Yangtze River Estuary water area is larger than the surface sediment concentration; however, form a wide range of horizontal sediment concentration distribution, the sediment concentration of North Channel is characterized by larger sediment concentration in middle area and small sediment concentration in upper and lower areas, which affects the sedimentation intensity distribution at each area of North Channel.

DOI: 10.3724/sp.j.1140.2011.02049