【摘要】 以南京溧水某生活垃圾填埋场作为研究对象，详细调查水文地质条件，概化水文地质概念模型，利用Feflow软件对该场地进行建模和拟合调参，选取特征污染物氨氮作为模拟对象，对地下水污染物的运移规律进行了模拟。模型考虑防渗有效与防渗失效两种工况下污染物的运移规律，模拟污染物在100天、1 000天、5年、10年和20年的迁移规律、污染范围及浓度情况。结果表明：在防渗有效时，污染物20年内运移的最大距离为18.16 m,污染总面积为57 996.05 m~2;防渗失效时，污染物运移主要受水力梯度影响，污染物20年内运移的最大距离为386.89 m,污染总面积为97 528.26 m~2。模拟结果旨在为垃圾填埋场的污染防治提供科学合理的参考依据。更多还原

【Abstract】 Taking a certain domestic waste landfill in Nanjing Lishui as the research object, this paper detailed investigation of hydrogeological conditions, generalized hydrogeological conceptual model, used Feflow software to model the site and fitting parameters, and selected characteristic pollutant ammonia nitrogen as the simulation object to simulate the migration law of groundwater pollutants.The model considers the migration law of pollutants under two different working conditions, effective and ineffective seepage prevention, and simulates the migration law, pollution range and concentration of pollutants in 100 days, 1 000 days, 5 years, 10 years, and 20 years.The simulation found that when the anti-seepage is effective, the maximum distance that pollutants can migrate within 20 years is 18.16 m, and the total polluted area is 57 996.05 m~2;when the anti-seepage fails, the migration of pollutants is mainly affected by the hydraulic gradient, and the maximum distance the pollutants migrate within 20 years is 386.89 m, and the total polluted area is 97 528.26 m~2.The above simulation results are designed to provide a scientific and reasonable reference for the pollution prevention and control of landfills.更多还原