磷酸盐在大连湾时空分布的数值模拟研究

Research on numerical simulation of spatial and time distribution of phosphate in Dalian Bay of China

大连湾由于接受附近大量的工业和生活废水造成海域严重污染.影响大连湾水质的主要污染物之一为总磷.为此应用数值模型对磷酸盐的时空分布进行了模拟研究.验证的模型结果较好地再现了磷酸盐的时空变化.模拟结果显示,在空间分布上,磷酸盐集中在排污口附近区域,最大值出现在15#监测点上;随季节变化,在夏季磷酸盐浓度最低为0.011m g/L,4月份达到高峰值0.22 m g/L.陆源废水排放位置是影响磷酸盐浓度空间分布的主要因素.由模型计算结果得出的磷酸盐时空变化规律有助于大连湾海岸区域水质污染防治.

The land pollutants discharged into Dalian Bay has led to serious pollution. Among all the pollutants, total phosphate is the main one. For predicting water quality in Dalian Bay, mathematical model was applied. Results show that phosphate is concentrated in the areas of wastewater discharge outlet and the maximum occurs at No. 15 monitor. The concentration of phosphate varies with seasons. In summer lower concentration of phosphate 0. 011 mg/L was predicted, the maximum 0.22 mg/L occurs in April. The inshore positions of the wastewater discharge are the major factors influencing the spatial distribution of phosphate concentrations. The numerical simulation results can help do a good work for the pollution control of Dalian Bay.