城市浅水湖泊水质模拟研究——以昆承湖为例

采用环境流体动力学模型(EFDC)对苏州市浅水湖泊昆承湖丰水期和枯水期水质进行模拟。结果表明,昆承湖COD高浓度带位于湖西部,东南部较低,主要受张家港河和莫城河2条入湖河道水体影响。湖西南部TP浓度较高;莫城河河道是导致昆承湖TP浓度较高的主要污染源。丰水期,NH4+-N高浓度区分布在湖西南部,莫城河河道水体对昆承湖NH4+-N浓度影响较大;枯水期,全湖西北部NH4+-N浓度较高,主要受张家港河河道水体影响。研究结果对昆承湖的水环境管理和环境综合整治有一定的参考价值。

Simulation of water quality of shallow lakes in cities: the example of Kuncheng Lake

The water quality of the shallow Kuncheng Lake in Suzhou during the high water and low water periods was simulated with a numerical model called EFDC (Environmental Fluid Dynamic Computation).The results showed a high concentration zone of COD located in the western part of Kuncheng Lake,while the concentration of COD was low in the southeast.The concentration of COD was mainly affected by the influents from Zhangjiagang Stream and Mochenghe Stream.The TP concentration was high in the southwest part of Kuncheng Lake and the main pollution source was the Mochenghe Stream.The main pollutants causing the high concentration zone of NH4+-N in the southwest of the lake during the high water period came from Mochenghe Stream.The concentration of NH4+-N was high in the northwest part of Kuncheng Lake,mainly due to the influent from Zhangjiagang Stream.These results can serve as a reference for the environment management and environment comprehensive regulation of Kuncheng Lake.