为了探明污染物在狭长海湾象山港内的输运规律，在验证良好的三维潮流模型基础上，计算和分析了不同驱动因素下的余环流结构和污染物的三维运移特征。余流模拟结果表明该海域余流结构区域差异性明显，狭湾内夏季余流垂向分层明显，表、底余流方向相反，分界点约在0.4~0.5倍水深处；口门及以外海域主要以水平环流为主。进一步采用拉格朗日粒子追踪方法，模拟了示踪粒子在湾内的三维运移轨迹。通过对不同位置释放的污染物粒子运移轨迹进行比较分析，最后给出了模拟期间的污染物运移规律。研究结果可为排污口选址和海湾污染治理等提供科学依据。%In order to study the pollutant transport characteristics in a narrow bay, Xiangshan Bay, the residual currents and characteristics of the pollutant transport have been calculated and analyzed based on a three-dimensional hydrodynamic numerical model. The results reveal that residual currents are different in different areas. In the fjord, the residual currents in vertical direction divide into two lays at 0.4~0.5 depth in summer. Currents of the upper layer flow to the bay mouth and those of the lower layer flow to the opposite. The main residual current direction in the outer area is horizontal. Then the trajectories of pollutant in Xiangshan Bay are simulated based on the Lagrangian particle tracking method. The pollutant transport rule is discovered which can provide the basis for the drain location and the management of estuarine environment.
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