Geophysics: 6 essential ways to better locate underground water
Last updated: October 2026 How do you find groundwater before you drill? Geophysical surveys measure physical properties of the ground, such as electrical resistivity, to map aquifers without drilling. Electrical resistivity imaging (ERI) is the most widely used method, and electromagnetic, seismic refraction, and seismoelectric surveys are other common options. The right choice depends on