闽江下游北港河段污染物运动特性模拟与分析

建立了闽江下游北港河段二维水动力、水质耦合模型，对不同排污口污染带特征进行了分析比较，结果表明：排污口的布置对北港水质有很大影响，在排放相同浓度相同流量的污染物时，各排污口污染带长度和宽度完全不同。各排污口污染带长度明显大于宽度，彬德闸、江泗闸产生的污染带比较短，五孔闸、九孔闸污染带很长，在排放流量为40m^3／s，排放浓度为15mg/L时，在彬德闸或江泗闸排放对东南水厂水质影响较小，在五孔闸或九孔闸排放对东南水厂造成很大的影响。

Numerical Simulation and Analyses on the Characteristic of Contaminant in the North Branch of the Lower Reach of Minjiang River

A two - dimensional hydrodynamic and water quality model is developed and applied to analyze the features of the pollution zone of different sewage ouffalls in the North Branch of the lower reach of Minjiang River. The result indicates that the set of the sewage ouffall affect the water quality of the North Branch. The length and width of pollution zones are various while the discharged contaminant is in the same concentration and flux. The length of the pollution zone of sewages is obviously larger than the width. The pollution zone of Binde Sluice and Jiangsi Sluice are short while the Wukong Sluice and Jiukong Sluice are long; as the discharge is 40 m^3/s and the concentration is 15 mg/L, the influence of water quality of Dongnan Waterworks is small when the sewage ouffalls is Binde Sluice and Jiangsi Sluice, while the influence is more bigger when the sewage ouffalls are Wukong Sluice and Jiukong Sluice.