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@ARTICLE{Kasteel:44312,
      author       = {Kasteel, R. and Burkhardt, M. and Giesa, S. and Vereecken,
                      H.},
      title        = {{C}haracterization of {F}ield {T}racer {T}ransport using
                      {H}igh-{R}esolution {I}mages},
      journal      = {Vadose zone journal},
      volume       = {4},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-44312},
      pages        = {101 - 111},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Flow and transport in soils and groundwater are greatly
                      affected by subsurface heterogeneity. We present results
                      from infiltration experiments on four heterogeneous field
                      plots (Orthic Luvisol) for plowed and nonplowed conditions.
                      A2-mm pulse of Br- was applied, followed a 40-mm application
                      of a 5 g L-1 solution of the food dye Brilliant Blue FCF
                      (Color Index 42090) in a 6-h period. Horizontal cross
                      sections were photographed at 0.05- and 0.10-m depth
                      intervals, representing the A(p) and B-t horizons,
                      respectively, either immediately or 90 d after the tracer
                      application. High-resolution spatial maps of Brilliant Blue
                      concentration were derived from the scanned photographs
                      using one single calibration relationship between Brilliant
                      Blue concentration and the color spectra for all plots and
                      depths. No significant or consistent directional dependence
                      was observed in the spatial correlation structure of the dye
                      concentration for the horizontal cross sections. However,
                      the integral scale showed a distinct depth dependency,
                      partially caused by horizonation, with a larger value in the
                      Ap than in the B-t horizon. Disturbed soil samples were
                      taken at 15 locations for each cross section and analyzed
                      for Br-. Although Brilliant Blue was retarded in the soil
                      matrix with respect to Br-, both tracer concentrations
                      showed an exponential decay with depth because of
                      preferential flow enhanced by plowing. Only a small fraction
                      of the dye was subjected to fast transport. The plot-scale
                      information of the dye distribution revealed that our 15
                      sampling locations at each depth sufficient to identify the
                      averaged plot-scale transport behavior in the soil matrix,
                      but failed to represent the conducting preferential flow
                      pathways.},
      keywords     = {J (WoSType)},
      cin          = {ICG-IV},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB50},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Environmental Sciences / Soil Science / Water Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000227469300009},
      url          = {https://juser.fz-juelich.de/record/44312},
}