Vertical Electrical Sounding (VES)

The Vertical Electrical Sounding (VES) allows to measure a subsoil resistivity vertical profile (1D), using a four electrodes array. Two current electrodes are installed with a specific spacing on the ground and are used to transmit the electrical current to the subsoil.  The other two electrodes, also installed on the ground, are used to measure the voltage difference. The investigation depth is directly related to the current electrodes spacing.