Investigation and Detection of Leachate Pool Plume from Landfill Pond in Hamedan Landfill Using Electrical Resistivity Tomography and Vertical Electrical Sounding

Document Type : Research Paper


1 Department of Geology, Faculty of Geology Sciences, Shahid Chamran University, Ahwaz, Iran

2 Department of Irrigation and Reclamation Engineering Department, Faculty of College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.

3 Waste Management Organization of Hamedan Municipality, Hamedan, Iran

4 Zendehrood Environmental Research Center, Esfahan, Iran

5 Department of Environment, College of Basic Science, Islamic Azad University, Hamedan Branch, Hamedan, Iran


Areas where waste is buried based on engineering design, which is one of the waste disposal methods. Leachate accumulation in landfills can adversely affect downstream groundwater resources by infiltrating the aquifer. In this study, we tried to investigate the potential of leachate penetration and the plume contamination caused by leachate pools inside and outside the landfill, respectively, using two methods of electrical resistivity tomography (ERT) and vertical electric sounding (VES). For this purpose, at a distance of 60 and 580 meters from the leachate basin, VES data were collected with a transmitter length of 200 meters and ERT with a length of 120 meters and electrode distances of 2 meters. Examination of geotechnical and VES data in the study area shows an impermeable layer with an alternation of clay-madstone and calcareous-marl layers at a depth of about 10-15 meters the percentage of the clay were increased. The ERT data in profile number 1 shows that at a distance of 32-76 meters from the beginning of the profile at deptt of 9 meters there are areas with low electrical resistivity, which indicates the area of leachate penetration, but in the other section of profile leachate deep penetration are not visible due to the Madstone and Siltstone impermeable layers. However, in the ERT data in profile number 2, the presence of an impermeable layer prevents the infiltration of leachate to the downstream and lower depths, which indicates the proper selection of the landfill. Therefore, contrary to what can be seen in the VES data, the study area is not homogeneous in terms of permeability to leachate in the two dimensions of ERT, but the presence of an impermeable layer prevents the deep transfer and infiltration of leachate to the aquifer.


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