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@ARTICLE{Andelov:172075,
      author       = {Andelov, Miso and Kunkel, Ralf and Uhan, Jože and
                      Wendland, Frank},
      title        = {{D}etermination of nitrogen reduction levels necessary to
                      reach groundwater quality targets in {S}lovenia},
      journal      = {Journal of environmental sciences (China)},
      volume       = {26},
      number       = {9},
      issn         = {1001-0742},
      address      = {[Amsterdam]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2014-05619},
      pages        = {1806 - 1817},
      year         = {2014},
      abstract     = {Within a collaborative project between Slovenian
                      Environment Agency (ARSO) and Research Center Jülich (FZJ),
                      nitrogen reduction levels necessary to reach groundwater
                      quality targets in Slovenia were assessed. For this purpose
                      the hydrological model GROWA–DENUZ was coupled with
                      agricultural N balances and applied consistently to the
                      whole territory of Slovenia in a spatial resolution of 100
                      × 100 m. GROWA was used to determine the water balance in
                      Slovenia for the hydrologic period 1971–2000.
                      Simultaneously, the displaceable N load in soil was assessed
                      from agricultural Slovenian N surpluses for 2011 and the
                      atmospheric N deposition. Subsequently, the DENUZ model was
                      used to assess the nitrate degradation in soil and, in
                      combination with the percolation water rates from the GROWA
                      model, to determine nitrate concentration in the leachate.
                      The areas showing predicted nitrate concentrations in the
                      leachate 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 DENUZ was used in a backward mode to quantify
                      the maximal permissible nitrogen surplus levels in
                      agriculture to guarantee a nitrate concentration in
                      percolation water below 50 mg NO3−/L. Model results
                      indicate that additional N reduction measures should be
                      implemented in priority areas rather than area-covering.
                      Research work will directly support the implementation of
                      the European Union Water Framework Directive in Slovenia,
                      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.},
      cin          = {IBG-3},
      ddc          = {690},
      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:000341739600006},
      doi          = {10.1016/j.jes.2014.06.027},
      url          = {https://juser.fz-juelich.de/record/172075},
}