Dong Xiaotian, Li Ruijie, Li Chunhui, Zhang Xufeng
J Environ Biol. 2016 Sep;37(5 Spec No):1201-1207.
The water quality diffusion and transport around archipelago have their own uniqueness and complexity. On the basis of multinest 2D mathematical model for currents around Zhoushan Islands, model for water quality prediction was built. The pollutants discharge of Xiaogan Island was taken into consideration and mathematical model for pollutant diffusion and transport in accident discharge was studied. The influence on water quality in different discharge intensity was calculated, which provided scientific basis for the control results. It was observed that the concentration contours of COD(Mn) at 0.03 km(2) in three conditions corresponded to standard discharge at 0.90 mg l(-1), accidental discharge at 1.02 mg l(-1)and extreme discharge at 1.42 mg l(-1), respectively. Although discharge point locates between the archipelago, diffusion of pollutants is rapid for the fast-flowing waters ofZhoushan Islands, that provides good diffusion conditions.
群岛周围水质的扩散和输运具有其自身的独特性和复杂性。基于舟山群岛周围潮流的多嵌套二维数学模型，建立了水质预测模型。考虑了小干岛的污染物排放情况，研究了事故排放中污染物扩散和输运的数学模型。计算了不同排放强度对水质的影响，为控制结果提供了科学依据。观察到三种工况下0.03 km²处COD（Mn）的浓度等值线分别对应标准排放0.90 mg·l⁻¹、事故排放1.02 mg·l⁻¹和极端排放1.42 mg·l⁻¹。尽管排放点位于群岛之间，但由于舟山群岛海域水流湍急，污染物扩散迅速，这提供了良好的扩散条件。
