A roll-along technique for 3D resistivity data acquisition with multi-electrode arrays

A roll-along technique for 3D data acquisition using standard multi electrode equipment, designed for engineering and environmental applications, allow measurement of large true 3D resistivity data sets. Results from a field test at a closed sludge disposal site display consistent data, with marked differences between measurement directions. The data was inverted to form a resistivity-depth model of the ground using a 3D quasi-Newton technique. The results achieved with the technique can be highly useful for engineering and environmental applications, but would require the use of multi channel measurement to speed up the data acquisition process for routine application.