TY  - JOUR
AU  - Pohlmeier, A.
AU  - van Dusschoten, D.
AU  - Weihermüller, L.
AU  - Schurr, U.
AU  - Vereecken, H.
TI  - Imaging water fluxes in porous media by magnetic resonance imaging using D2O as a tracer
JO  - Magnetic resonance imaging
VL  - 27
SN  - 0730-725X
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - PreJuSER-3486
SP  - 285 - 292
PY  - 2009
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:18701229
UR  - <Go to ISI:>//WOS:000263533300015
DO  - DOI:10.1016/j.mri.2008.06.007
UR  - https://juser.fz-juelich.de/record/3486
ER  -