Abstract：
The whopping increase in solid waste landfills poses serious threats to the environment. Compared to the drilling method, geophysical methods are effective, non-invasive techniques for delineating the contaminant distribution. In this study, electrical resistivity tomography (ERT) and induced polarization (IP) were used to investigate a solid waste deposit. The results of ERT/IP imaging illustrate the potential of the method in environmental studies. Based on the results of 21 survey lines, geo-electrical signals can be summarized as three types: with only high resistivity for construction & demolition wastes (CDWs) areas (RO type), contaminated soil for high chargeability (CO type), and contaminants under CDWs layer have both high resistivity and chargeability (RC type). Chargeability values over 10.2 mV/V correspond to contaminated soil with an overall concentration larger than 75 mg/kg. With the three-dimensional interpolation results and the determined chargeability criteria, the total volume of contaminated soil is 40,555 cubic meters. Finally, comparing the efficiency, cost and results of IP and drilling sampling methods shows that the IP is an efficient, low-cost and high-resolution contamination characterization. The results support that ERT/IP information can fulfill rapid and initial identification as a reliable tool in engineering and environmental investigations.
摘要：
固体废物填埋场的急剧增加对环境构成了严重威胁。与钻孔方法相比，地球物理方法是有效的，描绘污染物分布的非侵入性技术。在这项研究中,电阻率层析成像（ERT）和感应极化（IP）用于研究固体废物沉积物。ERT/IP成像的结果说明了该方法在环境研究中的潜力。根据21条勘测线的结果，地电信号可以概括为三种类型:只有高电阻率的建筑和拆除废物(CDW)区域(RO型),高荷电率的污染土壤（CO型），和CDW层下的污染物具有高电阻率和带电性(RC型)。超过10.2mV/V的带电性值对应于总浓度大于75mg/kg的污染土壤。根据三维插值结果和确定的带电性标准，污染土壤的总体积为40555立方米。最后,比较效率，IP和钻井采样方法的成本和结果表明，IP是一种有效的，低成本和高分辨率的污染表征。结果支持ERT/IP信息可以作为工程和环境调查中的可靠工具进行快速和初步识别。
