PMID: 8970099Jan 1, 1996Paper

Studies of soil-water transport by MRI

Magnetic Resonance Imaging
M H AminL D Hall

Abstract

Sequential spin-echo spin-warp MRI pulse sequences have been used to study soil-water transport processes including infiltration, redistribution, and drainage of water in soil columns. Those images provide a means for monitoring and quantifying spatial and temporal changes of soil-water distributions and the movement of wetting fronts. In addition, temporal-geometric changes of unstable wetting fronts during water redistribution were estimated from 2D images and the temporal development of the longest length of finger was described by a fractal relation t approximately L1.38. Bulk dispersion-time-dependent displacement and velocity spectra, as well as 2D maps of flow velocities and dispersion coefficients in soil macropores during saturated steady-state flow, were reconstructed from data obtained using the alternating-pulsed-field-gradient (APFG) pulse sequences.

References

Jan 1, 1994·Magnetic Resonance Imaging·M H AminB W Bache
Jan 1, 1986·Proceedings of the National Academy of Sciences of the United States of America·P A BottomleyT H Foster

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Citations

Mar 15, 2011·Progress in Nuclear Magnetic Resonance Spectroscopy·André J SimpsonMyrna J Simpson

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