Utilização do GPR para caracterizar tambores plásticos enterrados no sítio controlado de geofísica rasa do IAG/USP

In this work, the results obtained through the use of GPR - Ground Penetrating Radar method in characterization of plastic drums buried within the Shallow Geophysical Controlled Test Site of the IAG, installed inside of Sao Paulo University/USP are presented. The plastic drums are used to simulate of environmental contamination in urban areas. Empty drums and drums filled with fresh and salty water, are used to simulate respectively resistive contaminant, water from nuclear reactors, and conductive contaminant. Measurements were carried out before the installation of the targets in subsurface, in order to obtain data from "background" of the land, or geologic horizons before disturbances. Also bidimensional synthetic GPR models were constructed to simulate the geophysical response, to help in data interpretation and to decrease the uncertainties in the results. In a second stage, GPR data were obtained after targets installation. The analysis of the results was carried through the integration of real GPR data, 2D GPR numerical modeling, and the known depths of targets. The data integration presented an excellent agreement, allowing the clarity identification of all the targets, and their related geophysical signature. The qualitative and quantitative results on IAG's Test Site can be used in places where there is no have any information about the subsurface

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