@article{fdi:010078978, title = {{T}ime-lapse magnetic resonance sounding measurements for numerical modeling of water flow in variably saturated media}, author = {{L}egchenko, {A}natoli and {B}altassat, {J}. {M}. and {D}uwig, {C}{\'e}line and {B}oucher, {M}arie and {G}irard, {J}. {F}. and {S}oruco, {A}. and {B}eauce, {A}. and {M}athieu, {F}. and {L}egout, {C}. and {D}escloitres, {M}arc and {P}atricia, {F}. {A}. {G}.}, editor = {}, language = {{ENG}}, abstract = {{W}e presented an innovative hydrogeophysical approach that allows numerical modeling of water flow in a variably saturated media. {I}n our model, we approximated the subsurface by horizontally stratified porous media. {T}he model output was a time varying water content profile. {T}hen, we compared the water content provided by the model with the water content measurements carried out using the time-lapse {M}agnetic {R}esonance {S}ounding ({MRS}) method. {E}ach {MRS} sounding provided a water content profile in the unsaturated zone down to twenty meters. {T}he time shift between the profiles corresponded to the time lapse between individual {MRS} soundings. {W}e minimized the discrepancy between the observed and the modeled {MRS} signals by varying hydraulic parameters of soil layers in the water flow model. {F}or measuring and processing {MRS} data, we used {NUMIS} {MRS} instrument and {SAMOVAR} software. {W}e carried out water flow modeling with {HYDRUS}-1{D} software. {T}his paper reports our results and summarizes the limitations of the {MRS} method applied to water content measurements in the unsaturated zone.}, keywords = {{MRS} ; {H}ydrodynamic modeling ; {T}ime-lapse ; {V}illamblain ; {B}eauce ; {FRANCE} ; {BEAUCE}}, booktitle = {}, journal = {{J}ournal of {A}pplied {G}eophysics}, volume = {175}, numero = {}, pages = {art. 103984 [11]}, ISSN = {0926-9851}, year = {2020}, DOI = {10.1016/j.jappgeo.2020.103984}, URL = {https://www.documentation.ird.fr/hor/fdi:010078978}, }