TECHNOLOGIES > Geoelectrical surveys

Geoelectrical Surveys: Advanced Techniques for Subsurface Analysis

Geoelectric methods aim to reconstruct subsurface structures by measuring natural or artificially induced electrical fields through current injection.

The most commonly used soil properties are resistivity and chargeability (by induced polarization); these allow the reconstruction of one-dimensional (Vertical Electrical Soundings), two-dimensional (tomography from measurements on linear multielectrode profiles) and three-dimensional (tomography from measurements on areal electrode array) models.
This methodology is also frequently used for the identification of underground cavities and in archaeological research, for the three-dimensional reconstruction of underground structures (walls, ditches, rooms...).

The available instrumentation and software allow the application of the following methods:
– Vertical electrical surveys.
– Resistivity profiles.
– Resistivity and induced polarization tomography.
– Three-dimensional processing of multielectrode tomography from areal arrays.
– Areal measurements of resistivity and induced polarization.