TY  - JOUR
AU  - Wendland, F.
AU  - Behrendt, H.
AU  - Gömann, H.
AU  - Hirt, U.
AU  - Kreins, P.
AU  - Kuhn, U.
AU  - Kunkel, R.
AU  - Tetzlaff, B.
TI  - 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
JO  - Nutrient cycling in agroecosystems
VL  - 85
SN  - 1385-1314
CY  - Dordrecht [u.a.]
PB  - Springer Science + Business Media B.V
M1  - PreJuSER-5097
SP  - 63 - 78
PY  - 2009
N1  - 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.
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000269686900005
DO  - DOI:10.1007/s10705-009-9248-9
UR  - https://juser.fz-juelich.de/record/5097
ER  -