Improvement of coarse root detection using time and frequency induced polarization : from laboratory to field experiments
- Mary, B
- Abdul Samad, Feras
- Saracco, Ginette
- Peyras, Laurent
- Vennetier, Michel
- Mériaux, Patrice
- Camerlynck, Christian
DOIAbstract
International audienceAims: Over the last decade the induced polarization (IP) method has emerged as a promising tool for biogeophysics.Methods: In this work, in addition to electrical resistivity methods. IP was tested experimentally as a proxy for identifying and discriminating tree coarse roots from the surrounding soil. This study permitted to show the effect of polarisation at low frequencies (<25Hz) using spectral (SIP) and temporal (TDIP) approaches both in laboratory and in the field.Results: (i) the resistivity of woody roots samples was higher than that of silty soil; (ii) roots polarized at frequencies lower than that of the soil; (iii)the effects of polarization increased with the volume of the buried roots; (iv) the direction ...
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