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@ARTICLE{VanGaelen:187137,
      author       = {Van Gaelen, Nele and Verheyen, Dries and Ronchi, Benedicta
                      and Struyf, Eric and Govers, Gerard and Vanderborght, Jan
                      and Diels, Jan},
      title        = {{I}dentifying the {T}ransport {P}athways of {D}issolved
                      {O}rganic {C}arbon in {C}ontrasting {C}atchments},
      journal      = {Vadose zone journal},
      volume       = {13},
      number       = {7},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {FZJ-2015-00811},
      pages        = {},
      year         = {2014},
      abstract     = {An extensive sampling study identified the transport
                      pathways of dissolved organic C to the surface water in
                      contrasting catchments. An end-member mixing analysis
                      revealed that the transport pathways of dissolved organic C
                      can differ seasonally and highly depend on the degree of
                      saturation of the vadose zone.Dissolved organic C (DOC)
                      plays an important role in the cycling and distribution of
                      energy and nutrients. However, factors controlling the
                      transport of DOC both within and between ecosystems are not
                      clear. The aim of this work was to identify the contributing
                      pathways for transport of DOC to surface water in catchments
                      contrasting in land use and hydrogeology and during
                      different flow regimes. Stream water was sampled to observe
                      temporal variation of DOC concentrations and quality both
                      seasonally and at the time scale of a rain event. Major
                      cation and silica concentrations in stream water,
                      groundwater, soil pore water, precipitation/throughfall, and
                      riparian zone water samples were combined in an end-member
                      mixing analysis to determine the contributing end-members
                      for DOC delivery at the catchment outlet. Results show that
                      the change in DOC concentrations and quality observed in the
                      stream water during a rain event can be explained by a
                      change in contribution of the different end-members. In the
                      forested catchments with deep groundwater tables, the main
                      pathway for DOC transport from the soil to the surface water
                      during base flow was via the groundwater. Rising stream DOC
                      concentrations during rainfall events were attributed to
                      additional throughfall and riparian zone transport pathways.
                      In the grassland catchments with shallow groundwater tables,
                      DOC in the stream mainly originated from seeps. During rain
                      events, contributions from a surficial transport pathway and
                      riparian zone water gained importance. The importance of
                      contributing pathways changed seasonally and highly depended
                      on the degree of saturation of the vadose zone.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246) / 255 - Terrestrial Systems:
                      From Observation to Prediction (POF3-255)},
      pid          = {G:(DE-HGF)POF2-246 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000343161800002},
      doi          = {10.2136/vzj2013.11.0199},
      url          = {https://juser.fz-juelich.de/record/187137},
}