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Electrical methods

The Method

Electrical methods are based on the measurement of apparent resistivities in the ground using a multi-electrode device. These methods include These methods include vertical sounding, electrical trailing and 2D/3D tomography.

Vertical and lateral variations in apparent resistivity can be determined. The geometry of geological or man-made objects can be determined on the basis of these measurements, in particular using resistivity or chargeability contrasts.

An electrical tomography (ERT) is the joint measurement of a sequence of vertical electrical boreholes. The images obtained show the distribution of resistivities in the subsoil in two dimensions.

Three-dimensional acquisition has the advantage of providing information on the geometry of complex objects (foundations, cellars, cavities, etc.), taking into account the disturbing effects of topography. Optimized acquisition geometry enables coverage of large areas while maintaining satisfactory measurement quality.

Repeated measurements (timelapse), particularly in 3D, are extremely useful for monitoring groundwater or contaminated sites.

What we provide

Acquisition fine tuned for each study 2D/3D Acquisition Advanced interpretation
Geological modeling HydroGeological interpreation 2D/3D visualization Precise positioning