DefinePK

Abstract

In this paper the procedure of the design and the implementation of an electrical equipment to realize geophysical prospecting by means of the method of electrical tomography is exposed. The equipment is of medium power, which guarantees exploration depths quite suitable for commercial and geotechnical applications and studies. The equipment is essentially a DC voltage source of 500 volts which is capable of providing a maximum current intensity of 1 ampere. It also consists of a small current source which counteracts the electric currents that are naturally in the subsoil and which manifest as a potential difference in the surface. A general explanation of the geophysical method in question, allows to understand the basic principles of operation of the equipment and the functions that it has to fulfill. Once the construction of the equipment was completed, a data acquisition was carried out in the field near the municipality of Gachancipa (Cundinamarca). The data obtained with the equipment is processed with specialized software. The images obtained with the software present the distributions of the subsoil resistivities that can be associated to the possible structures and geology of the study area.