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@ARTICLE{Ritter:48171,
      author       = {Ritter, A. and Muñoz-Carpena, R. and Regalado, C. M. and
                      Javaux, M. and Vanclooster, M.},
      title        = {{U}sing {TDR} and inverse modeling to characterize solute
                      transport in a layered agricultural volcanic soil},
      journal      = {Vadose zone journal},
      volume       = {4},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-48171},
      pages        = {300 - 309},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Volcanic soils exhibit particular physical-chemical
                      properties (i.e., strong and stable natural aggregation and
                      high content of variable-charge minerals) that may influence
                      solute transport. To determine if such techniques like TDR
                      and inverse modeling are useful for analyzing solute
                      transport in volcanic soils, we studied the governing
                      transport processes by means of a miscible displacement
                      experiment of Br- in a large undisturbed soil monolith.
                      Bromide resident concentrations at several depths were
                      monitored successfully with TDR technology, while parameters
                      for the convective - dispersive (CDE) and mobile immobile
                      (MIM) transport models were estimated by inverse modeling.
                      For the relatively high soil moisture conditions, typical of
                      high frequency-irrigation systems that we considered, Br-
                      was found to move slowly by convection - dispersion.
                      Simulations with the CDE and MIM transport models yielded
                      very similar results. Although Br- is generally assumed to
                      behave as a tracer, we found that anion in our experiment
                      was subject to adsorption at the bottom of the monolith.
                      This may be explained by the variable-charge nature of the
                      minerals Fe and Al oxihydroxides) present in this volcanic
                      soil, which exhibited anion exchange when the pH of the soil
                      solution decreased below the zero point of charge.},
      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:000229799800004},
      doi          = {10.2136/vzj2004.0094},
      url          = {https://juser.fz-juelich.de/record/48171},
}