tailieunhanh - Báo cáo " Development of system of HydrodynamicEnvironmental models for coastal area (Case study in Quang Ninh - Hai Phong region) "

The system of three-dimensional hydrodynamic-environmental models could simulate full advection and dispersion processes of the dissolved and particulate matter as suspended sediment and all oil phases in the realistic marine conditions. The hydrodynamic model provides temperature, salinity and current structure and water level. These variables will be used in the environmental model simulating the advection and diffusion processes for suspended matter concentration, bottom sediment thickness and all oil spill phases in the water and bottom sediment. This model includes two-dimensional (2D) sub-model for surface oil slick, dissolved and particulate oil, the thickness change in the bottom sediment layer. | vnu journal of science earth sciences n0i 2007 development of system of hydrodynamic-environmental models for coastal area Case study in Quang Ninh - Hai Phong region Dinh Van Uu Ha Thanh Huong Pham Hoang Lam Marine Dynamics and Environment Centre MDEC VNU ABSTRACT. The system of three-dimensional hydrodynamic-environmental models could simulate full advection and dispersion processes of the dissolved and particulate matter as suspended sediment and all oil phases in the realistic marine conditions. The hydrodynamic model provides temperature salinity and current structure and water level. These variables will be used in the environmental model simulating the advection and diffusion processes for suspended matter concentration bottom sediment thickness and all oil spill phases in the water and bottom sediment. This model includes two-dimensional 2D sub-model for surface oil slick dissolved and particulate oil the thickness change in the bottom sediment layer and three-dimensional 3D sub-model for the suspended matter dissolved emulsified and particulate oil in the water column. Preliminary results for the EDC PCB transport in Ha Long Bay region for surface oil spill in the Hai Phong area show that the system of models could be used to simulate and predict the spreading of the contaminant matter in the coastal and estuarine waters and to resolve the problem of sediment transport and morphological change. 1. Introduction The computation and forecasting of the displacement of the contaminant matters and oil in the sea environment are very difficult due to the different phases of these pollutants oil slick at the surface dissolved and suspended in water and bottom sediment. The previous models for the contaminant matters and oil slick are built on the basis of applying the semi-empirical formulas developed in integration with the marine dynamic models. In practice the Euler approach is traditional in hydrodynamics and the Lagrange approach is used in studying .