为了解决傍河地下水污染问题，在通州某水系新建傍河污染地下水立体循环修复示范工程。利用GMS软件中的Modflow模块和RT3D模块建立地下水流溶质运移耦合模型，预测不同工况下地下水水质修复效果。模拟显示：在开挖河道不减渗立体循环水量10 000 m3/d的工况下，10年后其沿岸地下水氨氮质量浓度由Ⅴ类降到Ⅲ类，局部为Ⅱ类；在减渗条件下，自然入渗量仅为2 000 m3/d，无法形成地下水立体循环，10年后其沿岸地下水氨氮质量浓度为Ⅳ类，局部仍为Ⅴ类。因此，开挖河道河床不采用黏土减渗，傍河污染地下水抽出-自然入渗可形成立体循环，水质修复效果显著。

To solve the problem of groundwater pollution along the rivers,a stereoscopic remediation demonstration project is built in a water system in Tongzhou of Beijing，China.The Modflow module and GMS software module RT3D are used to establish a coupling model for groundwater flow and solute transport to predict the effect of groundwater remediation under different conditions.The simulation results show that,the mass concentration of ammonia nitrogen in the groundwater along the river decreased from class V to class III,and locally to class II under the condition of 10,000 m3 of water volume per day.Likewise, the natural infiltration per day is only 2000 m3 under the condition of seepage reduction,which can not form the stereoscopic circulation of groundwater.Ten years later,the mass concentration of ammonia nitrogen in the groundwater along the river is class IV,and locally is class V.The results show that the excavation of the river bed does not use clay to reduce seepage,and the pumping and natural infiltration of polluted groundwater near the river can form a stereoscopic circulation,and the effect of water remediation is significant.

国家科技重大专项课题（2017ZX07101004）;北京市科技计划课题（Z161100004516015）；北京市自然科学基金项目（Z160001）