Societatea Romana de Ecologie

Water Science & Technology Vol 51 No 11 pp 183–191 © IWA Publishing 2005

C. Schilling^, H. Behrendt^, A. Blaschke^, S. Danielescu^**, G. Dimova^, O. Gabriel^, U. Heinecke^, A. Kovacs^**, C. Lampert^, C. Postolache^, H. Schreiber^, P. Strauss^ and M. Zessner^{*****}

^*Institute for Water Quality and Waste Management, Vienna University of Technology, Wien, Austria, (E-mail: schilling@iwag.tuwien.ac.at)
^**Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
^***Institute for Hydraulics, Hydrology, Water Resource Management Vienna University of Technology, Austria
^****Department of System Ecology, University of Bucharest
^*****Institute for Water Quality and Waste Management, Vienna University of Technology, Wien, Austria, (E-mail: schilling@iwag.tuwien.ac.at)
^******Institute for Water Quality and Waste Management, Vienna University of Technology, Wien, Austria, (E-mail: schilling@iwag.tuwien.ac.at)
^*******Institute for Hydraulics, Hydrology, Water Resource Management Vienna University of Technology, Austria
^********Department of Sanitary and Environmental Engineering, Budapest University of Technology and Economics, Hungary
^*********Institute for Water Quality and Waste Management, Vienna University of Technology, Wien, Austria, (E-mail: schilling@iwag.tuwien.ac.at)
^**********Department of Sanitary and Environmental Engineering, Budapest University of Technology and Economics, Hungary
^***********Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
^************Institute for Land and Water Management, Petzenkirchen, Austria
^{*************}Institute for Water Quality and Waste Management, Vienna University of Technology, Wien, Austria, (E-mail: schilling@iwag.tuwien.ac.at)

ABSTRACT
In the framework of the project daNUbs (Nutrient Management in the Danube Basin and its Impact on the Black Sea) the MONERIS emission model is used for the basin wide calculation of nutrient (nitrogen and phosphorus) emissions in the Danube Basin. The MONERIS model was developed and successfully applied for German river catchments. Based on investigations in selected test regions (case studies) the daNUbs approach is to check the applicability of the MONERIS emission model for the specific conditions of the Danube Basin in more detail than is possible with a basin wide application. Six case studies with areas of 400–3,500 km² and several subcatchments have been selected in order to represent different conditions along the Danube Basin. In this study region intensive data collection and enhanced monitoring has been performed in order to raise the database significantly above the generally available data. Water balance as well as nutrient balance calculations have been performed with the MONERIS model as well as with other approaches. Results are compared to each other and to data from monitoring. Results up till now showed the applicability and sensitivity of the MONERIS approach in different conditions of the Danube Basin (e.g. emissions via groundwater). They indicated that the nitrogen retention in the catchments is well described with the MONERIS model. Keywords Danube river basin; emission modeling; MONERIS; nutrient emissions; test regions

C. Schilling*, H. Behrendt**, A. Blaschke***, S. Danielescu****, G. Dimova*****, O. Gabriel******, U. Heinecke*******, A. Kovacs********, C. Lampert*********, C. Postolache**********, H. Schreiber***********, P. Strauss************ and M. Zessner*************

C. Schilling^, H. Behrendt^, A. Blaschke^, S. Danielescu^**, G. Dimova^, O. Gabriel^, U. Heinecke^, A. Kovacs^**, C. Lampert^, C. Postolache^, H. Schreiber^, P. Strauss^ and M. Zessner^{*****}