某化工园区地下水污染模拟研究

Simulation of Groundwater Pollution in a Chemical Industry Park

文章以某化工园区为对象,基于现场水文地质条件和GMS(Groundwater Modeling System)软件分别建立了地下水流概念模型和数值模型以及溶质运移数值模型,模拟了不同类型污染物的污染路径和污染羽迁移状况,分析了污染对地下水环境可能造成的影响。结论可知:污染物沿污染中心向四周浓度逐渐减小,浓度梯度较大;污染物在含水层中会沿地下水流方向呈近似椭圆形状运移,且在水流的反方向亦有扩散现象存在;同一模拟时段内,COD不会超标,氨氮在第二水处理站的浓度中心处随时间迁移而超标,但超标浓度和范围不明显;模拟时段内,所有污染物均未超出厂界从而抵达长江,故不会影响长江水质。

We set a chemical industry park as object. Conceptual model of groundwater flow and numerical model of solute transport were estimated based on site hydrogeological condition and GMS （Groundwater Modeling System） software. Migration path of the contaminant plume for different types of pollutions were then simulated. At last, we analyze the impact of contaminant on groundwater environment. We can conclude that： the contaminants diffuse horizontally from the workshops to the surrounding area, with a relatively high concentration gradient;contaminants in the aquifer will transport along and opposite the direction of groundwater flow similar to an elliptical shape;within the same simulation period, ammonia dis not exceed the standard value, the concentration of COD at the center of pollution in the second sewage treatment plant will exceed the standard value with time;All contaminants in the simulation period did not arrived at the Yangtze River, it will not affect the water quality of the Yangtze River.