Time-lapse magnetic resonance sounding measurements for numerical modeling of water flow in variably saturated media

Anatoly Legchenko, Jean Michel Baltassat, Céline Duwig, Marie Boucher, Jean François Girard, Alvaro Soruco, Alain Beauce, Francis Mathieu, Cedric Legout, Marc Descloitres, Flores Avilès Gabriela Patricia

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

9 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Número de artículo103984
PublicaciónJournal of Applied Geophysics
Volumen175
DOI
EstadoPublicada - abr. 2020

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© 2020 Elsevier B.V.

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