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@ARTICLE{Larsbo:45738,
      author       = {Larsbo, M. and Roulier, S. and Stenemo, F. and Kasteel, R.
                      and Jarvis, N.},
      title        = {{I}mproved dual-permeability model of water flow and solute
                      transport in the vadose zone},
      journal      = {Vadose zone journal},
      volume       = {4},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-45738},
      pages        = {398 - 406},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We introduce an improved, one-dimensional, non-steady-state
                      dual-permeability model (MACRO 5.1). The model simulates
                      water flow and solute transport in the vadose zone of
                      structured soils by coupling high-conductivity-low porosity
                      macropore domain to a low-conductivity - high porosity
                      domain representing the soil matrix. Mass exchange between
                      the domains is approximated by first-order expressions. The
                      numerical solutions are briefly described, focusing on the
                      dual-permeability formulation. The solution method for water
                      flow in macropores was verified by comparing simulation
                      results with analytical solutions for a "kinematic wave".
                      The model was tested against high time-resolution
                      measurements of water flow and nonreactive (Cl-) solute
                      transport in transient microlysimeter experiments. The
                      objective was to test the identifiability of four key model
                      parameters determining the degree of preferential flow using
                      the generalized likelihood uncertainty estimation ( GLUE)
                      procedure. The parameters were chosen either because they
                      are difficult or impossible to measure directly or because
                      they were considered sensitive on the basis of earlier
                      experience with the model. The measurements, indicating
                      strong preferential flow, were adequately reproduced by the
                      model simulations overall model efficiency = 0.62). The GLUE
                      procedure conditioned the saturated matrix hydraulic
                      conductivity, the macroporosity, and the mass exchange
                      coefficient diffusion pathlength), indicating that these
                      parameters would be identifiable in inverse modeling
                      approaches based on microlysimeter experiments. The
                      conditioning of the kinematic exponent was poor, which was
                      attributed primarily to correlation with the macroporosity.},
      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:000229799800014},
      doi          = {10.2136/vzj2004.0137},
      url          = {https://juser.fz-juelich.de/record/45738},
}