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@ARTICLE{Irvine:21351,
      author       = {Irvine, D.J. and Brunner, P. and Hendricks-Franssen, H.J.
                      and Simmons, C.T.},
      title        = {{H}eterogeneous or homogeneous? {I}mplications of
                      simplifying heterogeneous streambeds in models of losing
                      streams},
      journal      = {Journal of hydrology},
      volume       = {424-425},
      issn         = {0022-1694},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-21351},
      pages        = {16 - 23},
      year         = {2012},
      note         = {This work was funded by the Australian Research Council and
                      the National Water Commission through the National Centre
                      for Groundwater Research and Training and the Swiss National
                      Foundation $(PZ00P2_126415).$ We would like to thank the
                      editor, the associate editor, and the anonymous reviewers
                      for their constructive comments.},
      abstract     = {A common approach in modeling surface water-groundwater
                      interaction is to represent the streambed as a homogeneous
                      geological structure with hydraulic properties obtained by
                      means of model calibration. In reality, streambeds are
                      highly heterogeneous, and there are currently no methodical
                      investigations to justify the simplification of this
                      geologic complexity. Using a physically based numerical
                      model, synthetic surface water-groundwater infiltration flux
                      data were generated using heterogeneous streambeds for
                      losing connected, losing transitional and losing
                      disconnected streams. Homogeneous streambed hydraulic
                      conductivities were calibrated to reproduce these fluxes.
                      The homogeneous equivalents were used for predicting
                      infiltration fluxes between streams and the aquifer under
                      different hydrological conditions (i.e. for different states
                      of connection). Homogeneous equivalents are shown to only
                      accurately reproduce infiltration fluxes if both the
                      calibration and prediction are made for a connected flow
                      regime, or if both the calibration and prediction are made
                      for a disconnected flow regime. The greatest errors in flux
                      (+/- $34\%)$ using homogeneous equivalents occurred when
                      there was a mismatch between the flow regime of the
                      observation data and the prediction. These errors are
                      comparatively small when compared with field measurement
                      errors for hydraulic conductivity, however over long river
                      reaches these errors can amount to significant volumes of
                      water. (C) 2011 Elsevier B.V. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {IBG-3},
      ddc          = {690},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Engineering, Civil / Geosciences, Multidisciplinary / Water
                      Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000301326600002},
      doi          = {10.1016/j.jhydrol.2011.11.051},
      url          = {https://juser.fz-juelich.de/record/21351},
}