% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@PHDTHESIS{Tetzlaff:55217,
      author       = {Tetzlaff, Björn},
      title        = {{D}ie {P}hosphatbelastung großer {F}lusseinzugsgebiete aus
                      diffusen und punktuellen {Q}uellen},
      volume       = {65},
      school       = {Universität Hannover},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-55217},
      isbn         = {3-89336-447-1},
      series       = {Schriften des Forschungszentrums Jülich. Reihe Umwelt /
                      Environment},
      pages        = {287 S.},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012; Universität
                      Hannover, Diss., 2006},
      abstract     = {This dissertation is embedded in the inter-disciplinary
                      project named ”REGFLUD“ which is funded by the German
                      Federal Ministry for Education and Research. The overall aim
                      of the thesis is to develop and apply a GIS-based model for
                      the analysis of P-fluxes from point and diffuse sources in
                      macroscale river basins. For this purpose two stuy basins
                      with varying natural conditions are chosen, i.e. the River
                      Ems catchment (12,940 km$^{2}$) and parts of the River Rhine
                      catchment (12,160 km$^{2}$). The new empirical phosphate
                      model MEPhos allows the quantification of mean longterm
                      P-inputs via drainage, groundwater-borne runoff, erosion,
                      wash-off, rainwater sewers, combined sewers overflows,
                      municipal sewage treatment plants and industrial effluents.
                      Additionally the model takes into account P-retention in
                      both running and standing waters. Diffuse P-entries to
                      surface waters via drainage, groundwater-borne runoff,
                      erosion and wash-off are modelled area-differentiated based
                      on a phosphotope-approach. Phosphotopes are homogeneous
                      sub-area types with defined properties and are used to
                      discretize the river basin. To derive phosphotopes
                      highly-resolved data sets are clipped in GIS. This approach
                      enables the localization of “hot spots”, i.e. subareas
                      with high potential for P-output. Because natural and
                      agricultural conditions of these sub-areas are known,
                      efficient reduction measures can be proposed. Pemissions
                      from municipal waste water treatment plants and industrial
                      effluents are quantified for every plant, inputs via
                      rainwater sewers and combined sewers overflows are modelled
                      integratively for river sub-basins. The modelled mean annual
                      P-entries to surface waters (1995-1999) sum up to 1666 t/a
                      for the Ems study basin and to 1574 t/a for the Rhine study
                      basin. The relations between diffuse and point sources are
                      87:13 for Ems and 32:68 for Rhine. In the lowland catchment
                      of the River Ems P-entries via the drainage pathway dominate
                      the diffuse load (69 \%). The contrasting natural conditions
                      in the sub-catchment of the River Rhine as well as the far
                      higher population density lead to a totally different
                      relevance of sources. P-entries from municipal waste water
                      treatment plants make up 41 \% of the total load. Among
                      diffuse sources erosion plays the most important role (11
                      \%). The highest contribution to the diffuse P-load in the
                      River Ems basin is made by the phosphotope “drained raised
                      bogs under grassland use”. This sub-area type emits about
                      30 \% of all diffuse entries, while it makes up only 3.5 \%
                      of the basin area. In the River Rhine sub-basin about 24 \%
                      of all diffuse P-entries originate from the phosphotope
                      “hydraulically connected arable land with erosion
                      potential of more than 15 t/(ha·a)“, which has an area
                      share of only 0.7 \%. Due to the combination of small area
                      share and high share of the overall diffuse P-load efficient
                      reduction measures should concentrate on these two
                      phosphotopes. The validation of MEPhos modelling results
                      against loads, estimated from measured water quality and
                      runoff data, is performed for 58 sub-catchments. It shows
                      good correlations between measured and modelled mean annual
                      P-loads (1995-1999). Sustainable use of water resources
                      creates the demand for data as a basis for decision making.
                      The implementation of the EU-water framework directive
                      requires river basin district management programmes. In this
                      context MEPhos modelling results can be of use.},
      cin          = {ICG-IV / STE},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)VDB50 / I:(DE-Juel1)VDB64},
      pnm          = {Terrestrische Umwelt / Nachhaltige Entwicklung und Technik},
      pid          = {G:(DE-Juel1)FUEK407 / G:(DE-Juel1)FUEK408},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/55217},
}