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@ARTICLE{Javaux:252,
      author       = {Javaux, M. and Schröder, T. and Vanderborght, J. and
                      Vereecken, H.},
      title        = {{U}se of a {T}hree-{D}imensional {D}etailed {M}odeling
                      {A}pproach for {P}redicting {R}oot {W}ater {U}ptake},
      journal      = {Vadose zone journal},
      volume       = {7},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-252},
      pages        = {1079 - 1088},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We studied water uptake variability at the plant scale
                      using a three-dimensional detailed model. Specifically, we
                      investigated the sensitivity of the R-SWMS model under
                      different plant collar conditions by comparing computed
                      water fluxes, flow variability, and soil water distributions
                      for different case scenarios and different
                      parameterizations. The relative radial root conductivity and
                      soil hydraulic conductivity were shown to control the plant
                      water extraction distribution. Highly conductive soils
                      promote water uptake but at the same time decrease the
                      variability of the soil water content. A large radial root
                      conductivity increases the amount of water extracted by the
                      root and generates very heterogeneous water extraction
                      profiles. Increasing the xylem conductivity has less impact
                      because the xylem is generally the most conductive part of
                      the system. It was also determined that, due to the
                      different magnitudes of soil and root conductivities,
                      similar one-dimensional sink-term profiles can result in
                      very different water content and flux distributions at the
                      plant scale. Furthermore, an analysis based on soil texture
                      showed that the ability of a soil to sustain high plant
                      transpiration demand cannot be predicted a priori from the
                      soil hydraulic properties only, as it depends on the
                      evaporative demand and on the three-dimensional
                      distributions of the soil/root conductivity ratio and soil
                      capacity, which continuously evolve with time. Combining
                      soil and root hydraulic properties led to very complex
                      one-dimensional sink functions that are quite different from
                      the simple reduction functions usually found in the
                      literature. The R-SWMS model could be used to develop more
                      realistic one-dimensional reduction functi},
      keywords     = {J (WoSType)},
      cin          = {JSC / ICG-4 / JARA-ENERGY / JARA-SIM},
      ddc          = {550},
      cid          = {I:(DE-Juel1)JSC-20090406 / I:(DE-Juel1)VDB793 /
                      $I:(DE-82)080011_20140620$ / I:(DE-Juel1)VDB1045},
      pnm          = {Terrestrische Umwelt / Scientific Computing},
      pid          = {G:(DE-Juel1)FUEK407 / G:(DE-Juel1)FUEK411},
      shelfmark    = {Environmental Sciences / Soil Science / Water Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000258444600013},
      doi          = {10.2136/vzj2007.0115},
      url          = {https://juser.fz-juelich.de/record/252},
}