This system entails injecting electrical present into the bottom by two outer electrodes and measuring the ensuing potential distinction between two internal electrodes. The configuration maintains equal spacing between all 4 electrodes, aligned linearly on the soil floor. The measured resistance is then used to calculate the obvious resistivity of the subsurface materials, assuming a homogeneous and isotropic soil construction.
Correct willpower of subsurface resistivity is essential for a wide range of engineering and geophysical functions. Purposes span from web site investigation for grounding techniques and cathodic safety design to geological surveys and groundwater exploration. Historic use of this technique dates again a number of many years and has advanced by numerous refinements in instrumentation and knowledge processing methods, contributing considerably to understanding {the electrical} properties of the earth.
