A piping system was recognized using different<br>geophysical methodologies to access the subsurficial<br>distribution of its channels. The responses of three<br>antennas (100, 200, and 400 MHz) of the groundpenetrating<br>radar (GPR) method were compared, as<br>well as resistivity profiles obtained with different<br>electrode arrays (Cacau, Wenner, and dipole-dipole).<br>The best GPR results were obtained with the 100<br>MHz antennas, which was used to achieve five<br>profiles to demarcate the path of the pipe. The pipe<br>was well identified by using the Cacau (with fixed<br>electrodes with offset of 40 meters) and Wenner<br>arrays, and all the other profiles has indicated a<br>second pipe unrelated to the main pipe.


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