Spectral induced polarization measurements on New Zealand sands

Because of the dependence of the ac electrical conductivity of granular materials on surface effects related to pore geometry, spectral induced polarization measurements (SIP) have the potential to provide a geophysical technique which can be used to estimate aquifer properties such as hydraulic conductivity. We present the results of laboratory SIP measurements on a variety of sand samples typical of aquifers in the coastal areas of New Zealand and relate these to the measured hydraulic conductivity.