%0 Journal Article
%A Pohlmeier, A.
%A van Dusschoten, D.
%A Weihermüller, L.
%A Schurr, U.
%A Vereecken, H.
%T Imaging water fluxes in porous media by magnetic resonance imaging using D2O as a tracer
%J Magnetic resonance imaging
%V 27
%@ 0730-725X
%C Amsterdam [u.a.]
%I Elsevier Science
%M PreJuSER-3486
%P 285 - 292
%D 2009
%Z Record converted from VDB: 12.11.2012
%X In this study, we investigate the usefulness of D(2)O as a conservative tracer for monitoring water flux by MRI in a heterogeneous sand column. The column consisted of a cylindrical 3x9-cm packing of fine sand in which an 8-mm diameter cylindrical obstacle was placed. Constant steady-state flux densities between J(w)=0.07 and 0.28 cm min(-1) corresponding to mean pore flow velocities between 0.20 and 0.79 cm min(-1) were imposed at the top of the sand column, and a constant hydraulic head of -39 cm was maintained at the lower boundary. We injected pulses of 0.01 M NiCl(2) and 55% D(2)O and monitored the motion of the tracer plumes by MRI using a fast spin echo sequence over a period of 20 min. We observed that the center of gravity of all plumes moved with the mean pore flow velocity, which showed that D(2)O behaves as a conservative tracer. The motion of the tracer plume at J(w)=0.14 cm min(-1) was validated by a numerical simulation using HYDRUS2D, which reproduced the experimentally observed behavior very satisfactorily.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:18701229
%U <Go to ISI:>//WOS:000263533300015
%R 10.1016/j.mri.2008.06.007
%U https://juser.fz-juelich.de/record/3486