Electrical Resistivity Survey

Electrical Resistivity Survey is a geophysical method used to measure the resistance of subsurface materials to the flow of electrical current. Variations in resistivity help identify differences in soil, rock, and moisture content, making this technique highly effective for mapping groundwater, stratification, and geological formations.

In a typical survey, electrical current is introduced into the ground through electrodes, and the resulting potential differences are measured using additional electrodes placed at specific intervals. Different materials—such as clay, sand, rock, and water-bearing zones—exhibit distinct resistivity values. The collected data is processed and interpreted to generate subsurface profiles, helping to determine layer thickness, depth, and composition.

Electrical Resistivity Surveys are widely used in groundwater exploration, geotechnical investigations, environmental studies, and mineral exploration. They are particularly useful for locating aquifers, identifying contamination zones, and assessing subsurface conditions before construction. As a non-invasive and cost-effective technique, it provides reliable data for informed decision-making and resource management.