AN IMPLICIT 2-D DEPTH-AVERAGED FINITE-VOLUME MODEL OF FLOW AND SEDIMENT TRANSPORT IN COASTAL WATERS
Proceedings of the 32nd International Conference
PDF

Keywords

Shallow water flow
sediment transport
two-dimensional
finite volume method
quadtree rectangular mesh

How to Cite

Wu, W., Sanchez, A., & Zhang, M. (2011). AN IMPLICIT 2-D DEPTH-AVERAGED FINITE-VOLUME MODEL OF FLOW AND SEDIMENT TRANSPORT IN COASTAL WATERS. Coastal Engineering Proceedings, 1(32), sediment.23. https://doi.org/10.9753/icce.v32.sediment.23

Abstract

An implicit depth-averaged 2-D finite volume model has been developed to simulate sediment transport and bed morphological changes under actions of currents and waves near coastal inlets. The model computes the depth-averaged 2-D shallow water flow and non-equilibrium transport of total-load sediment, accounting for the effects of wave radiation stresses and turbulent diffusion induced by currents, waves and wave breaking. The model uses a quadtree rectangular mesh to locally refine the mesh around structures of interest or where the topography and/or flow properties change rapidly. The grid nodes are numbered by means of an unstructured index system for more flexibility of mesh generation. The SIMPLEC algorithm is used to handle the coupling of water level and velocity and the Rhie and Chow's (1983) momentum interpolation method is adopted to determine the intercell fluxes on non-staggered grid. Well-developed longshore current and wave setup determined with the reduced 1-D momentum equations are used as the cross-shore boundary conditions. The model has been tested in several laboratory and field cases, showing good performance. In particular, it can use a long time step and is efficient in computation on a PC platform. It has a potential for simulation of long-term coastal morphodynamic processes.
https://doi.org/10.9753/icce.v32.sediment.23
PDF

References

Buttolph, A.M., C.W. Reed, N.C. Kraus, N. Ono, M. Larson, B. Camenen, H. Hanson, T. Wamsley, and A.K. Zundel. 2006. Two-dimensional depth-averaged circulation model CMS-M2D: Version 3.0, Report 2: Sediment transport and morphology change, Technical Report ERDC/CHL TR-06-9,Coastal and Hydraulics Laboratory, ERDC, US Army Corps of Engineers, Vicksburg, MS, USA.

Camenen, B., and M. Larson. 2007. A unified sediment transport formulation for coastal inlet application, Technical Report ERDC-CHL CR-07-01, Coastal and Hydraulics Laboratory, ERDC, US Army Corps of Engineers, Vicksburg, MS, USA.

Cayocca, F. 2001. Long-term morphological modeling of a tidal inlet: the Arcachon Basin, France. Coastal Engineering, 42, 115-142.http://dx.doi.org/10.1016/S0378-3839(00)00053-3

Chesher, T.J., H.M. Wallace, I.C. Meadowcroft, and H.N. Southgate. 1993. PISCES, A Morphodynamic Coastal Area Model, First Annual Report, Report SR 337, HR Wallingford, UK.

Forunato, A.B., and A. Olveira. 2003. A modeling system for tidally driven long-term morphodynamics, Journal of Hydraulic Research, 42(4), 626-634.

Han, Q. 1980. A study on the non-equilibrium transportation of suspended load, Proc. First International Symposium on River Sedimentation, Beijing, China. PMCid:293862

Li, Z.H., K.D. Nguyen, J.C. Brun-Cottan, and J.M. Martin. 1994. Numerical simulation of the turbidity maximum transport in the Gironde Estuary (France), Oceanologica Acta, 17(5), 479-500.

Lin, L., Z. Demirbilek, H. Mase, J. Zheng, and F. Yamada. 2008. CMS-Wave: A nearshore spectral wave processes model for coastal inlets and navigation projects, Technical Report ERDC/CHL TR-08-13, Coastal and Hydraulics Laboratory, ERDC, US Army Corps of Engineers, Vicksburg, MS, USA.

Militello, A., C.W. Reed, A.K. Zundel, and N.C. Kraus. 2004. Two-dimensional depth-averaged circulation model M2D: Version 2.0, Report 1, Technical documentation and user's guide. ERDC/CHL TR-04-2, Coastal and Hydraulics Laboratory, ERDC, US Army Corps of Engineers, Vicksburg, MS, USA. Kraus, N.C., and M. Larson. 1991. NMLONG - Numerical model for simulating the longshore current. Report 1: Model development and tests, Technical Report DRP-91-1, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS, USA.

Osborne, P.D., D.B. Hericks, N.C. Kraus, and R.M. Parry. 2002. Wide-area measurements of sediment transport at a large inlet, Grays Harbor, Washington, Proc. 28th Int. Conf. on Coastal Engineering, World Scientific, Cardiff, UK, 1-13.

Phillips, B.C., and A.J. Sutherland. 1989. Spatial lag effects in bed load sediment transport, J. Hydr. Res., IAHR, 27(1), 115-133.http://dx.doi.org/10.1080/00221688909499247

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.