海潮顶托作用下某铝厂污水处理站泄漏引发的地下水污染预测模拟

Simulation and prediction of the groundwater pollution caused by leakage of sewage treatment station in an aluminum plant under sea tidal support

为了预测某铝厂污水处理站在非正常状况下(污水渗漏事故)对地下水环境所造成的影响,通过详细的水文地质勘察获知研究区的水文地质条件,再通过钻孔注水试验测定出含水层的渗透系数,最后运用GMS进行数值模拟得到地下水污染晕运移预测结果图。模拟结果显示:该工程污水处理站突发污水渗漏事故后,地下水含水层将受到COD、氟化物(F-)的严重污染,且污染浓度随着时间延长越来越高,分析认为这主要是模拟区含水介质的渗透性小以及地下水流场受海水顶托造成的。

In order to predict the impact of an aluminum plant wastewater treatment station on the groundwater environment under abnormal conditions(sewage leakage accident),the hydrogeological conditions of the study area were obtained through detailed hydrogeological investigations,and then the permeability coefficient of the aquifer was measured through borehole injection tests,and finally the predicted results of groundwater contamination halo transport were obtained by numerical simulation using GMS.Simulation results show that the project of sewage treatment station of emergent water leakage accident happens,the groundwater aquifer will be COD,fluoride(F-)serious pollution,and pollution concentration with the extension of time more and more high,the analysis that this is mainly due to the simulation of the small permeability of the water-bearing medium and the groundwater flow field caused by the top of seawater.