Time-lapse magnetic resonance sounding measurements for numerical modeling of water flow in variably saturated media
| Autor: | Céline Duwig, Alvaro Soruco, Jean-Michel Baltassat, Alain Beauce, Cédric Legout, Jean-François Girard, Flores Avilès Gabriela Patricia, Francis Mathieu, Marc Descloitres, Marie Boucher, Anatoly Legchenko |
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| Přispěvatelé: | Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Université Grenoble Alpes - UFR Médecine (UGA UFRM), Universidad Mayor de San Andrés (UMSA), Indo-French Cell for Water Sciences (IFCWS), Indian Institute of Science [Bangalore] (IISc Bangalore), Institut de Recherche pour le Développement (IRD), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
MRS
010504 meteorology & atmospheric sciences Water flow [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Numerical modeling Soil science 010502 geochemistry & geophysics 01 natural sciences 6. Clean water Villamblain Depth sounding Geophysics Time-lapse [SDU]Sciences of the Universe [physics] Hydrodynamic modeling Beauce [SDE]Environmental Sciences Vadose zone Soil horizon Porous medium Water content Magnetic resonance sounding ComputingMilieux_MISCELLANEOUS Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Applied Geophysics Journal of Applied Geophysics, 2020, 175, pp.103984. ⟨10.1016/j.jappgeo.2020.103984⟩ Journal of Applied Geophysics, Elsevier, 2020, 175, pp.103984. ⟨10.1016/j.jappgeo.2020.103984⟩ |
| ISSN: | 0926-9851 |
| DOI: | 10.1016/j.jappgeo.2020.103984 |
| Popis: | We presented an innovative hydrogeophysical approach that allows numerical modeling of water flow in a variably saturated media. In our model, we approximated the subsurface by horizontally stratified porous media. The model output was a time varying water content profile. Then, we compared the water content provided by the model with the water content measurements carried out using the time-lapse Magnetic Resonance Sounding (MRS) method. Each MRS sounding provided a water content profile in the unsaturated zone down to twenty meters. The time shift between the profiles corresponded to the time lapse between individual MRS soundings. We minimized the discrepancy between the observed and the modeled MRS signals by varying hydraulic parameters of soil layers in the water flow model. For measuring and processing MRS data, we used NUMIS MRS instrument and SAMOVAR software. We carried out water flow modeling with HYDRUS-1D software. This paper reports our results and summarizes the limitations of the MRS method applied to water content measurements in the unsaturated zone. |
| Databáze: | OpenAIRE |
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