Flow and Diffusion Measurements in Natural Porous Media Using Magnetic Resonance Imaging
Thomas Baumann*,a,
Rainer Petschb,
Gunther Feslb and
Reinhard Niessnera
a Institute for Hydrochemistry, Technical University of Munich, Marchioninistr. 17, D-81377 München, Germany
b Dep. of Neuroradiology, Ludwig-Maximilians-University Munich, Marchioninistr. 15, D-81377 München, Germany

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Fig. 1. Setup of the magnetic resonance (MR) experiment and cross-section of the soil column.
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Fig. 2. Images of the sediment column (diameter is 100 mm).
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Fig. 3. Three-dimensional reconstruction of the pore space in the medium gravel.
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Fig. 4. Relation between signal intensity and flow rate. A.U. = Arbitrary unit.
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Fig. 5. Measured vs. modeled velocities. Confidence intervals for the regression lines are given at the 95% level.
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Fig. 6. Relative frequency of mean voxel velocities at 1.97 mL/s.
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Fig. 7. Spatial distribution of the flow velocities in Layer 6 at 3.33 mL/s.
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Copyright © 2002 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.