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长江口流域污染物排放较多,受地形和水环境过程影响其运动规律极为复杂。为保护近岸海域水质环境,须在洞悉该区域环境水动力基础上开展污染物运动规律的研究。基于ECOMSED三维数值模型和拉格朗日粒子追踪技术,采用单个粒子以及粒子群模拟追踪了长江口的石洞口、竹园、白龙港三大污水排污口区域污染物质的运动轨迹,重点分析了水体表层、中层、底层污染物的运动特性及其影响范围,在此基础上,对该区域水体的排污设置方式提出了参考建议。
The discharge of pollutants in the Yangtze River estuary is more, and its movement is extremely complicated due to the influence of topography and water environment. In order to protect the water quality and environment in the offshore area, a study on the law of movement of pollutants must be conducted on the basis of insight into the hydrodynamic environment in the area. Based on ECOMSED 3D numerical model and Lagrangian particle tracing technique, single particles and particle swarm optimization are used to track the movement of pollutants in the three sewage outfalls in Shijiangkou, Zhuyuan and Bailonggang in the Yangtze River Estuary. On the basis of this, the paper put forward some suggestions on how to set the water discharge in this area.