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@ARTICLE{Wendland:5097,
      author       = {Wendland, F. and Behrendt, H. and Gömann, H. and Hirt, U.
                      and Kreins, P. and Kuhn, U. and Kunkel, R. and Tetzlaff, B.},
      title        = {{D}etermination of nitrogen reduction levels necessary to
                      reach groundwater quality targets in large river basins:
                      {T}he {W}eser basin case study, {G}ermany {N}utrient
                      {C}ycling in {A}groecosystems},
      journal      = {Nutrient cycling in agroecosystems},
      volume       = {85},
      issn         = {1385-1314},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-5097},
      pages        = {63 - 78},
      year         = {2009},
      note         = {This project was commissioned by Germany's Federal Ministry
                      of Food, Agriculture and Consumer protection (BMELV), the
                      River Basin Commission Weser (RBC Weser) and the Federal
                      States Bremen, Hessen, Niedersachsen, Nordrhein-Westfalen,
                      Sachsen-Anhalt and Thuringen.},
      abstract     = {We used the interdisciplinary model network REGFLUD to
                      predict the actual mean nitrate concentration in percolation
                      water at the scale of the Weser river basin (Germany) using
                      an area-differentiated (100 m x 100 m) approach. REGFLUD
                      combines the agro-economic model RAUMIS for estimating
                      nitrogen surpluses and the hydrological models GROWA/DENUZ
                      for assessing the nitrate leaching from the soil. The areas
                      showing predicted nitrate concentrations in percolation
                      water above the EU groundwater quality standard of 50 mg
                      NO3/l, have been identified as priority areas for
                      implementing nitrogen reduction measures. For these "hot
                      spot'' areas a backward modelling approach was used to
                      quantify the maximal permissible nitrogen surplus levels in
                      agriculture to guarantee a mean long-term nitrate
                      concentration in percolation water below 50 mg NO3/l.
                      Research work will directly support the implementation of
                      the EU-Water Framework Directive in the Weser basin, e.g. by
                      using the maximal permissible nitrogen surplus levels as a
                      framework for the derivation of regionally adapted and hence
                      effective nitrogen reduction measures.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4},
      ddc          = {570},
      cid          = {I:(DE-Juel1)VDB793},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Soil Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000269686900005},
      doi          = {10.1007/s10705-009-9248-9},
      url          = {https://juser.fz-juelich.de/record/5097},
}