高密度电法在某生活垃圾填埋场地下水污染成因解析中的应用

Application of high-density electrical method in analyzing the causes of groundwater pollution in a certain municipal solid waste landfill site

内蒙古某生活垃圾填埋场下游监测井检测多项地下水分析项超标,原因不明,疑与垃圾填埋场渗漏有关。为查找该垃圾填埋场地下水污染成因,本次研究拟通过高密度电法初步查明垃圾填埋场是否存在渗漏及渗漏位置,并推测判断渗漏可能造成的影响范围。结果显示:渗漏主要集中在垃圾填埋场南坝西段、西坝西南段及渗滤液池一带,并向下游方向迁移;南坝中部浅层的次低阻异常带是渗漏隐患点,需给与一定关注,防止其发展为渗漏通道;随深度的增加,整体低阻异常体范围逐渐缩小,进入基岩后无低阻异常出现,基岩对地下水运移具有较强的阻隔作用。本次研究结果为今后该类型垃圾填埋场地下水污染治理工作提供了重要参考。

Multiple groundwater analysis items in the downstream monitoring well of a domestic waste landfill in Inner Mongolia exceeded the standard,and the reason is unknown,suspected to be related to leakage from the landfill.To investigate the causes of groundwater pollution in the landfill site,this study intends to use high-density electrical methods to preliminarily determine whether there is leakage and its location in the landfill site,and speculate on the possible impact range caused by leakage.The results show that the leakage is mainly concentrated in the western and southwestern sections of the south dam of the landfill site,as well as the area around the leachate pool,and migrates downstream;The sub low resistance anomaly zone in the middle of Nanba is a potential leakage hazard and requires certain attention to prevent it from developing into a leakage channel;As the depth increases,the overall range of low resistance anomalies gradually narrows,and there are no low resistance anomalies after entering the bedrock.The bedrock has a strong barrier effect on groundwater migration.The results of this study provide important references for future groundwater pollution control work in this type of landfill.