%0 Journal Article
%A Wendland, F.
%A Behrendt, H.
%A Gömann, H.
%A Hirt, U.
%A Kreins, P.
%A Kuhn, U.
%A Kunkel, R.
%A Tetzlaff, B.
%T Determination of nitrogen reduction levels necessary to reach groundwater quality targets in large river basins: The Weser basin case study, Germany Nutrient Cycling in Agroecosystems
%J Nutrient cycling in agroecosystems
%V 85
%@ 1385-1314
%C Dordrecht [u.a.]
%I Springer Science + Business Media B.V
%M PreJuSER-5097
%P 63 - 78
%D 2009
%Z 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.
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000269686900005
%R 10.1007/s10705-009-9248-9
%U https://juser.fz-juelich.de/record/5097