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@ARTICLE{Tetzlaff:6838,
      author       = {Tetzlaff, B. and Kuhr, P. and Vereecken, H. and Wendland,
                      F.},
      title        = {{A}erial photograph-based delineation of artificially
                      drained areas and their relevance for water balance and
                      nutrient modeling in large river basins},
      journal      = {Physics and chemistry of the earth},
      volume       = {34},
      issn         = {0079-1946},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PreJuSER-6838},
      year         = {2009},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Intensive agriculture in lowland river catchments is
                      unthinkable without artificial drainage, but these drainage
                      installations represent also an important pathway for
                      diffuse nutrient inputs to surface waters.Efficient tackling
                      of eutrophication requires distributed nutrient modelling
                      with special emphasis on phosphorus inputs, because of their
                      limitative role in freshwater ecosystems. General
                      decision-making aims at the regional scale, but usually only
                      little information exists about the location of drainage
                      installations within meso- and macro-scale river basins.
                      This lead to the development of an approach, how
                      artificially drained lands can be identified by interpreting
                      aerial photographs, and how these findings can be
                      extrapolated by combining land use and soil information in
                      GIS. The approach results in a map of artificially drained
                      areas, which is presented here for the River Ems basin
                      (12,940 km(2)), located in north-western Germany. This map
                      provides the basis for distributed modelling of drainage
                      runoff and diffuse phosphorus inputs. From the model
                      results, it can be found, that about $69\%$ of all P-inputs
                      into surface waters are discharged via artificial
                      drainages.Just under $30\%$ of the diffuse P-inputs arise
                      from less than $4\%$ of the catchment area. These subareas
                      consist of drained raised bogs used as grassland. Due to the
                      favourable ratio of input level to area they are now at the
                      focus of mitigation measures. With respect to the
                      implementation of the European Water Framework Directive,
                      the importance of model-supported analyses of nutrient
                      inputs is increasing. (C) 2009 Elsevier Ltd. All rights
                      reserved.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB793},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Geosciences, Multidisciplinary / Meteorology $\&$
                      Atmospheric Sciences / Water Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000267959300005},
      doi          = {10.1016/j.pce.2009.02.002},
      url          = {https://juser.fz-juelich.de/record/6838},
}