Aquifer Characterization by Spectral Induced Polarisation - Field and Lab Measurements

In this study porosity (Φ) and hydraulic conductivity (K) estimations are conducted on the basis of independent frequencies of 1D, 2D and lab Spectral Induced Polarisation (SIP) data. We compare SIP 1D and 2D models with lab results, before we discuss different approaches to derive hydraulic parameters i.e. classical and modified Archie for Φ estimation and Slater and Lesmes (2002) and Boerner et al. (1996) for K estimation. Both approaches for P estimation yield similar results, while lab and field data show differences. For K estimation lab and field SIP data agree better. While K values after Boerner vary strongly within depth, results after Slater vary in a smaller range but are slightly too low, probably due to the limited validity range of this empirical relation.