辽河口区径流对污染物漂移扩散的影响

基于MIKE3三维数值模型，本文将水动力模块与水质模块耦合，模拟了辽东湾海域无机氮DIN的浓度分布，并探讨了辽河径流变化对无机氮浓度分布的影响。模拟结果表明:辽东湾无机氮DIN经历了秋、冬季积累，春、夏季消耗的过程，浓度从东北至西南方向呈递减趋势，东北区域辽河口和大辽河口处为无机氮高浓度区；在河流输入无机氮浓度不变的情况下，辽河强水动力条件会使整个湾内污染物浓度增加，加剧水体污染，弱水动力条件在一定程度上可以改善海域水质状况。

Effects of the Liao river discharge on the dispersion of pollutants

Based on the three-dimensional numerical model, this article simulates the distribution of the DIN concentration in Liaodong bay and investigates the influence of the variation of Liao river discharge on the distribution of DIN concentration, by coupling the hydrodynamic module and the water quality module of the model.The simulation results show that the DIN is accumulated during autumn and winter while consumed during spring and summer and the concentration of DIN gradually declines from the northeast to the southwest.In the northwest of Liaodong bay, high concentration of DIN exits in the Liao River estuary and the Daliao river estuary.With the concentration of the DIN input from the river remaining the same, strong hydrodynamic condition of Liao river will increase the concentration of DIN in the whole Liaodong bay, causing more serious water pollution.A weak hydrodynamic condition will improve the water quality of the sea area to some extent.