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Flow and Diffusion Measurements in Natural Porous Media Using Magnetic Resonance Imaging

^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

View larger version (23K): [in a new window]   Fig. 1. Setup of the magnetic resonance (MR) experiment and cross-section of the soil column.

View larger version (129K): [in a new window]   Fig. 2. Images of the sediment column (diameter is 100 mm).

View larger version (177K): [in a new window]   Fig. 3. Three-dimensional reconstruction of the pore space in the medium gravel.

View larger version (19K): [in a new window]   Fig. 4. Relation between signal intensity and flow rate. A.U. = Arbitrary unit.

View larger version (29K): [in a new window]   Fig. 5. Measured vs. modeled velocities. Confidence intervals for the regression lines are given at the 95% level.

View larger version (27K): [in a new window]   Fig. 6. Relative frequency of mean voxel velocities at 1.97 mL/s.

View larger version (85K): [in a new window]   Fig. 7. Spatial distribution of the flow velocities in Layer 6 at 3.33 mL/s.