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Chapitre D'ouvrage Année : 2011

Magnetic Resonance Imaging and Relaxometry as Tools to Investigate Water Distribution in Soils

Résumé

Relaxation times and two imaging sequences (spin echo and single point imaging) were performed onto repacked soil samples to study respectively water distribution within the porosity and to measure water content profiles, distinguishing water contained in large pores from water contained in the whole porosity. These methods were applied to 25 samples of the same soil that was prepared to obtain aggregates of three different size, then repacked to five bulk densities. Samples were then equilibrated with water at five matric potentials. We found that T 1 and T 2 measurements present similar time distributions with essentially four peaks. We attributed the two shortest times to textural pores, and the two longest times to structural pores. The water profile measured with spin echo sequence was attributed to water contained in structural pores.
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Dates et versions

hal-01317555 , version 1 (18-05-2016)

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Eric Michel, Stéphane Sammartino, Claude Doussan. Magnetic Resonance Imaging and Relaxometry as Tools to Investigate Water Distribution in Soils. Magnetic resonance in porous media Book Series: AIP Conference Proceedings,, 2011, ⟨10.1063/1.3562235⟩. ⟨hal-01317555⟩
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