Detection of Landfill Leachate Leakage Based on ERT and OCTEM

Abstract

Leakage in the impervious layer of a domestic waste landfill seriously pollutes the soil and groundwater. Therefore, it is necessary to carry out rapid nondestructive leakage location detection. In this research, the electrical resistivity tomography (ERT) method and the opposing-coils transient electromagnetic method (OCTEM) were used to detect the leakage location. The inversion sections of both methods showed a clear low–middle–high resistivity spectrum in the longitudinal direction that could be used to speculate the distribution pattern of the upper waste body layer, the bottom impermeable layer, and the lower limestone layer. The leakage area was identified in Zone B of the landfill on the basis of inversion results and drilling verification results. The results indicate that OCTEM and ERT were both sensitive to leakage detection. However, OCTEM had higher longitudinal resolution and more refined inversion results, resulting in more effective delineation for the location of the damage and leakage of the impervious landfill layer, thereby providing a new technical basis for landfill leakage detection.

Mapping Leachate Pathways in Aging Mining Tailings Pond Using Electrical Resistivity Tomography

“…Lu et al have provided evidence that ERT is a highly effective means of detecting leakage within the impervious layer of a domestic waste landfill. Their research has thus established a novel technical foundation for detecting such leaks within landfills [40]. Martorana employed 3D ERT and induced polarization for the identification of regions with elevated leachate concentration in a waste landfill.…”

Determination of leachate leakage around a valley type landfill and its pollution and risk on groundwater

“…As a non-invasive technique, geophysical technology can preliminarily detect the geological environment characteristics of study area (Shangguan et al, 2016), and the pollution plumes produced by land ll leachate in ltration (Lu et al, 2023;Lu et al, 2023a;Abbaspour et al, 2000;Porsani et al, 2004;Santos et al, 2006). A valley-type land ll in Hunan Province was taken as an example in this study for the following purposes: (1) geophysical technology would be conducted to detect and determine the pollution range and depth produced by land ll leachate in ltration; (2) the parameters of leachate and groundwater would be determined to assess groundwater quality in studied area; (3) multivariate statistics would be applied to analyze the relationship of various parameters of groundwater and land ll leachate; (4) the risk of groundwater would be evaluated on the human health based on the RBCA model.…”