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为了模拟预测建设项目在生产运行和服务期满后对地下水造成的污染影响问题,建立了地下水渗流与溶质运移三维耦合数值模型,并以江苏吴江盛泽城区生活垃圾卫生填埋场建设项目为例,模拟预测了垃圾填埋场运行期10年内和运行期满后10年内渗滤液污染物在地下水中的运移特征。结果表明:填埋场在天然条件下和防渗条件下渗滤液污染物运移范围垂向均限于潜水含水层内,不涉及承压含水层;平面上仅限于填埋场附近。三维数值模拟能同时模拟预测渗滤液污染物垂向及水平向的运移范围,具有重要的工程实用价值。
In order to simulate the impact of the construction project on the pollution caused by groundwater after production and service expiry, a three-dimensional coupled numerical model of groundwater seepage and solute transport was established. The construction project of domestic solid waste landfill in Shengze City, Wujiang, Jiangsu Example, the simulation predicts the landfill leachate transport characteristics within 10 years and within 10 years after the expiration of the landfill leachate pollutants. The results show that the landfill leachate transport limit under natural conditions and seepage control conditions are all vertically confined to the submersible aquifer, not to the confined aquifer; and the landfill site is limited to the landfill site. Three-dimensional numerical simulation can simulate the vertical and horizontal transport of leachate pollutants at the same time, which has important engineering practical value.