Induced Polarization
This method consists of a tetraelectrodic system. The higher current electrodes charge the subsurface during a period of time and the potential electrodes receive the response on a longer time. This way we analyze how the subsoil is discharged, specially the discharge by metals in the subsurface. By passing current we are able to polarize conductive materials, and we can localize and model the investigated masses. Modern instrumentation register induced polarization data simultaneously with resistivity measurements.

Applications
-Estimating water content/ soil moisture
-Determining solute concentration/ salinity estimation
-Mapping clays, contaminants, hydrogeological boundaries, fracture zones
-Estimating microstructure and microgeometry of porous systems