垃圾填埋场渗滤液污染地下含水层及修复过程的三维动态监测实验

为实现垃圾填埋场渗滤液在地下含水层中动态扩散及污染层修复过程的实时监测，利用自行设计的三维电学观测系统开展了室内相关监测实验.实验表明渗滤液在含水层中的扩散过程会引起不同时期实测电剖面上低阻异常区的动态变化.对比分析这种变化特征可确定渗滤液扩散区的污染程度、扩散速度及扩散方向.在注水修复过程中，扩散区污染物含量的降低会引起对应区域实测视电阻率值的升高和异常区范围的变化.实验结果对于实现垃圾渗滤液污染地下含水层现状调查及动态监测具有重要意义.

Experiment of monitoring underground aquifers contaminated by leachate of landfill and remation with 3 D electrical method

In order to discuss effective means of monitoring the dynamic diffusing process of polluted zone of underground aquifers caused by infiltration of landfill leachate and their renovating process,a three-dimensional electro-monitoring system is devised to stimulate the processes in laboratory.Experimental results indicate that the diffusing process of leachate in the aquifer behaves as the dynamic change of low-resistivity abnormal zone on electrical resistivity sections obtained in different periods of time.Pollution level,diffusing velocity and direction can be known from contrast analysis of such a change.The renovating process behaves as the increase of apparent electrical resistivity and change of abnormal characteristics distribution on electrical resistivity sections with the decreasing of pollutant content.The experimental results bear great significance in investigating present situations of underground aquifers polluted by landfill leachate as well as in dynamic monitoring the polluting and renovating process.