Electrical resistivity survey is a geophysical method that measure the bulk resistivity of subsurface materials to determine geologic structure and/or physical properties of the subsurface materials. An electrical current is injected directly into the ground through an evenly spaced string of current electrodes and the resulting voltage potential difference is measured between a pair of potential electrodes.

Some Application of Electrical Resistivity survey are:

• Groundwater exploration
• Determine depth to bedrock and overburden thickness
• To identify the existence of cavity and underground void
• Characterize subsurface hydrogeology