A three dimensional coastal hydrodynamic and pollutant diffusion model
- 海洋环境－已发表论文 
本文提出一种浅海三维污染物扩散数值模拟的方法 .首先建立σ坐标系下的Navier Stoker方程及物质扩散方程 .基于过程分裂法将前者分解为外模式 (二维方程组 )及内模式 (三维方程组 ) ;并且引入窄缝法对变边界进行模拟 ,由此建立三维σ坐标潮流模型 ;并找到σ坐标系下三维污染物扩散方程的差分方法 ,最后建立三维σ坐标污染物扩散模型 .本模式已被应用于厦门海域 ,并对其 2 0 0 2年海水水质 (CODCr值增量 )进行了预测 .应用结果表明 ,这种三维可变边界污染物扩散数值模型能够较好地对具有较大面积浅海滩涂的海区进行水质模拟和预测 .A three-dimensional pollutant diffusion modeling method used in coastal waters was proposed in this paper. At first, the Navier-Stockes equation and mass diffusion equation were established. The N-S equation was separated into two modes based on procedure split method, one is external mode (2-dimensional equations), the other is internal mode (3-dimensional equations). Cabined gap method was adapted to simulate the varying boundaries. Thus, a 3-dimensional tidal model was set up. Finally, the 3-dimensional σ-coordinate pollutant diffusion model could be finished by combining the tidal model with a σ-coordinate pollutant diffusion equation. This model was used in the Xiamen sea area to estimate its water quality (COD Cr increase) in 2002. This application validate that the 3-dimensional varying boundary pollutant diffusion model could be used to simulate and forecast the water quality in the coastal shallow areas.