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@ARTICLE{Vanderborght:55665,
      author       = {Vanderborght, J. and Vereecken, H.},
      title        = {{O}ne-{D}imensional {M}odeling of {T}ransport in {S}oils
                      with {D}epth-{D}ependent {D}ispersion, {S}orption and
                      {D}ecay},
      journal      = {Vadose zone journal},
      volume       = {6},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-55665},
      pages        = {140 - 148},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Macroscopic spatial variations in advection velocity lead
                      to an increase in dispersion with increasing travel distance
                      or depth. In soils, this increase goes along with a decrease
                      in decay and sorption of organic substances. We used three
                      different one-dimensional models that make different
                      assumptions about the dispersion process to compare
                      predicted leaching in a 1-m-deep soil profile with layers
                      with different sorption and decay parameters. The first two
                      convective dispersive models assume that dispersion results
                      from microscopic variations in solute particle velocities
                      that are not correlated across soil layer boundaries. The
                      third model, a stream tube model ( STM), assumes that the
                      particle velocity remains constant along its trajectory and
                      is perfectly correlated in different layers. The three
                      models were parameterized to predict the same inert tracer
                      breakthrough curve ( BTC) at 1-m depth. The first
                      convective-dispersive model assumes a constant dispersion
                      coefficient ("homogeneous'' convection-dispersion equation
                      [CDE]). The second model uses different dispersion
                      coefficients in the different layers ("layered'' CDE) to
                      predict the same inert tracer BTCs as the STM at the layer
                      boundaries. Despite similar predictions of inert tracer
                      BTCs, the models predicted different BTCs of reactive
                      substances at 1-m depth. The different predictions by the
                      STM and layered CDE illustrate the importance of the
                      correlation of solute particle velocities in different soil
                      layers. They also point to a fundamental problem related to
                      the use of a CDE with a depth-dependent dispersion to mimic
                      a dispersion process caused by macroscopic variations in
                      particle velocities.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4 / JARA-ENERGY / JARA-SIM},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$ /
                      I:(DE-Juel1)VDB1045},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Environmental Sciences / Soil Science / Water Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000245811500010},
      doi          = {10.2136/vzj2006.0103},
      url          = {https://juser.fz-juelich.de/record/55665},
}