镇江新区垃圾填埋场地下水溶质运移模拟  

Simulation of underground water solute migration in waste landfill site of Zhenjiang New District

作　　者：马敏杰 付乐意 谭燕 MA Minjie;FU Leyi;TAN Yan(Kunming Institute of Survey and Design,State Forestry and Grassland Administration,Kunming 650216,Yunnan,China;The Third Geological Brigade of Jiangsu Bureau of Geology and Mineral Resources,Zhenjiang 212001,Jiangsu,China)

机构地区：[1]国家林业和草原局昆明勘察设计院,云南昆明650216 [2]江苏省地质矿产局第三地质大队,江苏镇江212001

出　　处：《矿产与地质》2020年第5期1001-1008,共8页Mineral Resources and Geology

摘　　要：以镇江新区固废填埋场为研究对象,在已知填埋场基坑东侧防水帷幕发生破坏情况下,详细调查区域水文地质条件,充分分析研究区地下水污染物运移通道,利用GMS中Modflow和MT3D两个模块建立地下水水流模型和溶质运移模型,选取硝酸盐作为敏感因子对地下水污染物运移规律进行模拟预测。模型共设置污染物泄漏量为污水总量的1%和2%两种情景,模拟污染物持续泄漏180 d以及切断污染源后残留污染物运移1500 d内的迁移规律、污染范围和浓度分布情况。通过模拟预测得知,污染物在地下水中迁移较慢;切断污染源后污染面积呈现先增大再减小的趋势;污染物最远迁移281 m浓度就低于20 mg/L。In this paper,the solid waste landfill site in Zhenjiang New District is taken as the research object.Under the condition that the waterproof curtain on the east side of the foundation pit of the known landfill site is damaged,the hydrogeological condition in the area is investigated in detail,and the groundwater pollutant transport channel in the study area is fully analyzed.The two modules of Modflow and MT3D are used to establish groundwater flow model and solute migration model,and the acid salt is selected as a sensitive factor to simulate and predict the groundwater pollutant migration regularity.The model sets up two conditions for the leakage of pollutants at 1%and 2%of the total sewage,simulating the migration regularity,pollution scope and concentration distribution of the pollutants continuously leaking for 180 days and the residual pollutant migration within 1500 days after the pollution source is cut off.Through simulation prediction,it is known that the pollutants migrate slowly in groundwater,after cutting off the pollution source,the pollution area first increases and then decreases.The concentration of pollutants that migrate at the distance of 281 m is less than 20 mg/L.

关 键 词：溶质运移 污染羽 数值模拟 垃圾填埋场 

分 类 号：X523[环境科学与工程—环境工程]