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2-d numerical SIMULATION OF RAdIONUCLIdE TRANSPORT IN THE LOWER YANGTZE RIVER

Journal of Hydrodynamics 2012年第5期24卷 702-710页

作者： ZHANG Wan-shun ZHAO Yan-xin XU Yan-hong WANG Yong-gui XU Gao-hong School of Resource and Environmental Science Wuhan University Wuhan 430079 China Bureau of Hydrology of Changjiang Water Resources Commission Wuhan 430010 China

The assessment of the radiological impact of the liquid discharges from nuclear power plants is a major issue for the envi- ronmental protection. In this study, a numerical model for the radionuclide transport in the aquatic environment is built, based on the hydrodynamic equations, including the complete set of Saint-Venant equations, the sediment transport equations, with consideration of several different particle sizes and the deposition and erosion of the suspended sediments, and the radionuclide transport equations The exchanges of radionuclides between water, suspended matter and bed sediments are described in terms of kinetic transfer coe- fficients. The model is used to simulate the transport of the radionuclides discharged from a planned nuclear power plant project to be sited along the lower Yangtze River. From the model results, one may see the detailed temporal-spatial evolution of the radio- nuclide contamination in the solution, in the suspended matter and in the bed sediments. The model can be used as a basic tool for studying the environmental impacts of the liquid discharges from nuclear facilities on a river system.

关键词： 2-d numerical model radionuclide Yangtze River sediment

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A　2-d　Non-local　Closure　model　for　Atmospheric　Boundary　Layer　Simulations

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Advances in Atmospheric Sciences 1996年第2期13卷 169-182页

作者：蒋维楣王雪梅 Guest Researcher in LAPC Beijing department of Atmospheric Sciences Nanjing University Nanjing

In this paper a new approach for PBL simulation, the non-local closure scheme based on the transient turbulence theory has been used. It was set up as an alternative to local closure schemes which physical concept is reasonable and distinct. A 2-d non-local closure model was developed in order to study the PBL structure and simulatesome interesting atmospheric processes over non-ulliform underlying surface, especially under the convective and unique weather conditions, such as sea-land circulation and the TIBL structure. The modelled results show good agreement with field measurement.

关键词： Non-local closure 2-d numerical model The PBL simulation Non-uniform underlying surface

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