Zhili Wang, Yanfen Geng, Yongjun Lu


In this paper, the development and implementation of a three-dimensional, numerical sediment transport model, which is based on staggered C-unstructured grids in the horizontal direction and Z-level grids in the vertical direction, is delineated. The three dimensional model is discretized by semi-implicit finite volume method, in that the free-surface and vertical diffusion are semi-implicit, thereby removing stability limitations associated with the surface gravity wave and vertical diffusion terms. The remaining terms in the momentum equations are discretized explicitly by integral method. The model is closed physically and mathematically using the Mellor and Yamada level-2.5 turbulent closure submodel. The numerical model is used for simulation accumulation process of immersed tube tank of HMZ (Hong Kong-Macau-Zhuhai) bridge. The model is calibrated and its performance extensively assessed against on-site experiment.


3D model; finite volume; unstructured grid; HMZ Bridge; tube tank; sediment transport

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Blumberg, A. F., and Mellor, G. L. 1980. A coastal ocean numerical model. Proc., Int. Symp. on Math. Modelling of Estuarine Phys., J. Sundermann and K. P. Holz, eds., Springer, Berlin, 202–19.

Blumberg, A. F., and Mellor, G. L. 1987. A description of a three dimensional coastal ocean circulation model. Three-dimensional coastal ocean models. Coastal and estuarine sciences: Volume 4, N.Heaps, ed., American Geophysical Union, Washington, D.C., 1–16.

Casulli, V., 1999. A semi-implicit finite difference method for non-hydrostatic, free-surface flows, Int. J. Numer. Methods Fluids 30, 425–440.<425::AID-FLD847>3.0.CO;2-D

Chen, C.S., Liu, H.D., Beardsley, R.C., 2003. An Unstructured Grid, Finite-Volume, ThreeDimensional, Primitive Equations Ocean Model: Application to Coastal Ocean and Estuaries, Journal of Atmospheric and Oceanic Technology, 20,159-186.<0159:AUGFVT>2.0.CO;2

Ding, Y., and Wang, S.S.Y., 2008. Recent Developments in modeling coastal and estuarine morphological processes and applications to coastal flood management and erosion protection, World Environmental and Water Resources Congress,ASCE, 1-12.

Fringer, O.B., Gerritsen, M., Street R.L., 2006. An unstructured-grid, finite-volume, nonhydrostatic, parallel coastal ocean simulator, Ocean Modelling, 14,139–173.

Lu, Y.J., Ji, R.Y., and Zuo, L.Q., 2009. Morphodynamic responses to the deep water harbor development in the Caofeidian sea area, China's Bohai Bay, Coastal Engineering, 2009, 56(8),831-843.

Mao, Q.W., Shi,P., Yin, K.D., Gan, J.P., qi, Y.Q., 2004. Tides and tidal currents in the Pearl River

Estuary. Continental Shelf Research, 24, 1797-1808.

Wang, Z.L., Lu, Y.J., and Zhou, L.Q., 2008. Unstructured 3D baroclinic model of current and salt for strong tidal estuary. The Ocean Engineering, 26(2), 43-53. (In Chinese)

Wang, Z.L. Geng, Y.F. and Lu, Y.J., 2010. 1D and 2D full coupling models for tidal flow in river networks and estuaries II: application to the Pearl River Delta. China Ocean Engineering (In press).

Ye, L., Preiffer, K.D., 0. Studies of 2D & 3D numericalsimulation of Kelvin tide wave in Nei Lingdingyang at Pearl River Estuary. Ocean Engineering, 8 (4), 33–44.