Field-scale estimation of soil properties from spectral induced polarization tomography

Estimates of soil properties such as Cation Exchange Capacity (CEC), water content, grain size characteristics, and permeability are important in geotechnical engineering, resources, agriculture. We develop a non-intrusive approach to estimate these the field using spectral induced polarization (SIP) tomography. This geophysical method provides information about frequency dependence complex electrical conductivity porous media. Using 18 samples collected from Bordeaux vineyard, we first conducted laboratory study SIP over range 10 mHz-45 kHz. The data were used confirm accuracy recently developed dynamic Stern layer petrophysical model. results consistent with published values previous works soils. A comparison was made by comparing spectra experimental at two locations where core obtained. model then concert image spatial distribution CEC, permeability, mean along vineyard transect. For clay sandy textures found field, measured estimated CEC agree rather well (from 6 40% discrepancy). Our an efficient way non-invasive manner, high resolution, field-relevant scales critical zone Earth.