TAILIEUCHUNG - Model for water circulation in tidal dominated estuarine regions

The litho-hydrodynamic and environmental conditions in the Vietnamese coastal estuarine basin are significantly affected by the land-ocean-atmosphere interaction processes whish tide has a determining role. Application of the coupled 1D, 2D and 3D modeling system could resolve this complicated problem but it requires other solutions related with the boundary and coupling conditions. | Model for water circulation in tidal dominated estuarine regions Dinh Van Uu3 and Ha Thanh Huong4 Abstract The litho-hydrodynamic and environmental conditions in the Vietnamese coastal estuarine basin are significantly affected by the land-ocean-atmosphere interaction processes whish tide has a determining role. Application of the coupled 1D 2D and 3D modeling system could resolve this complicated problem but it requires other solutions related with the boundary and coupling conditions. A fully three-dimensional 3D baroclinic hydrodynamic model was developed and applied for tidal dominated open estuarine regions. The Marine Hydrodynamic and Environmental Center MDEC model is enable simulate the hydrodynamic features of the coastal estuarine basin with a minimum requirement of the river and tidal boundary conditions. The model was tested and calibrated by simulating total water circulation and level in the Haiphong estuarine region. The results show good agreement between the numerical simulation and field measurement. The model could be developed and coupled with environmental model to future coastal ocean monitoring and prediction system for Vietnamese coastal waters. Keywords hydrodynamics numerical modeling estuaries circulation 1. Introduction The physical processes in the estuarine and coastal region are complex and involve advection diffusion and mixing within the water column as well as the dynamics of bottom boundary layer BBL . The bottom stresses depend on the BBL conditions formed under forcing factures as tide wind and surface wave. To include these processes into circulation model for water column an adequate description of the BBL is required. The interaction processes between waves and currents play an important role and the moving sediment affects both on the flow and on the bed form. This study is based on a modeling system which links a 3D coastal circulation model surface forcing model bottom boundary layer model and opens boundary conditions. .

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