Characterization of an Experimental Cell in a Municipal Solid Waste Landfill Using 2-D Electrical Profiling Technique

The electrical resistivity method (ER) with the electrical profiling technique (EP) were applied to landfill Delta A, located next to the highway dos Bandeirantes in Campinas (São Paulo, Brazil). Within the landfill there is a region of approximately 5,200 m2 called “experimental cell” with waterproofing base through HDPE (High Density Polyethylene) geomembrane which is regular monitoring by the UNICAMP Geotechnical Department. The main objective was to verify how the body of waste and the geomembrane are imaged with EP technique, and if there is evidence of leachate concentration areas and how the images would be if there was rupture of the geomembrane leaking. In the area were performed 6 lines with a length of 110 m and 12 m spacing between them using dipole-dipole array with electrode spacing of 4 m and 5 m. The survey provides information about the experimental cell, identifying the resistive layer (geomembrane) and allowed us to compare the data with simulations in the laboratory. Subsequently, due to the concentrations of slurry generating points of high conductivity values, it is advisable to use other methodologies such as the ground penetrating radar (GPR) and the electromagnetic (EM-34), to compare the data obtained with the method used in this survey.