01001naa a2200181 a 450000100080000000500110000800800410001910000190006024501050007926000090018452003810019365000310057465300110060565300080061665300210062470000170064577301570066210297292006-03-24       1999    bl ---       0--  u    #d1 aPOSADAS, A. N.  a3-D wetting front instabilities in layered soil studies using MRI and an invasion percolation model.  c1999  aThis work presents a three-dimensional characterization and simulation of preferential flow in a two-layer soilusing Magnetic Resonance Imaging-MRI, fractal theory, and an invasion percolation model. The infiltration process ofwater through a stratified sandy soil column was studied under hydrodynamics steady state condition with imagesobtained using a 500 Gauss MRI system.  amagnetic resonance imaging  aImagem  aMRI  aTrês dimensões1 aCRESTANA, S.  tIn: AMERICAN SOCIETY OF AGRONOMY ANNUAL MEETING, 91., 1999, Salt Lake City. 1999 Annual meeting abstracts... New York: ASA: CSSA: SSSA, 1999. p.305-309.