基于GMS软件的某工业园区地下水水质影响的数值模拟预测

Numerical Simulation and Prediction of Groundwater Quality in an Industrial Park Based on GMS Software

以安庆市高新技术产业开发区某厂区为例,基于GMS软件的MODFLOW和MT3DMS模块模拟分析污染物中模拟预测因子(COD、氨氮)在正常工况、非正常工况条件下在地下水中的运移路径、影响范围及浓度分布情况,评估其泄露可能引起的地下水污染风险。结果表明:正常工况下,20年后COD和氨氮在第一含水层最大迁移距离分别为122.6 m和71.3 m,在第一弱透水层最大迁移距离分别为100.1 m和54.3 m;正常工况下,20年后COD和氨氮在第一含水层最大迁移距离分别为194.3 m和159.8 m,在第一弱透水层最大迁移距离分别为179.7 m和146.1 m,均小于污染源与下游方向最敏感点石门湖之间最短距离。因此,在污染泄露得到及时的处理后,对敏感点处地下水环境污染风险低。

Taking a factory in Anqing High-tech Industrial Development Zone as an example,MODFLOW and MT3DMS modules based on GMS software simulated and analyzed the migration path,influence range and concentration distribution of simulated predictors of pollutants(COD and ammonia nitrogen)in groundwater under normal and abnormal working conditions,and assessed the groundwater pollution risk caused by their leakage.The results show that the maximum migration distances of COD and ammonia nitrogen in the first aquifer are 122.6 m and 71.3 m,respectively,and 100.1 m and 54.3 m,respectively,in the first weak permeable layer after 20 years under normal working conditions.Under normal working conditions,after 20 years,the maximum migration distances of COD and ammonia nitrogen in the first aquifer are 194.3 m and 159.8 m,and the maximum migration distances in the first weak permeable layer are 179.7 m and 146.1m,respectively,which are smaller than the shortest distance between the pollution source and Shimen Lake,the most sensitive point downstream.Therefore,after the pollution leakage is treated in time,the risk of groundwater environmental pollution at sensitive points is low.