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000005097 084__ $$2WoS$$aSoil Science
000005097 1001_ $$0P:(DE-Juel1)VDB4997$$aWendland, F.$$b0$$uFZJ
000005097 245__ $$aDetermination of nitrogen reduction levels necessary to reach groundwater quality targets in large river basins: The Weser basin case study, Germany Nutrient Cycling in Agroecosystems
000005097 260__ $$aDordrecht [u.a.]$$bSpringer Science + Business Media B.V$$c2009
000005097 300__ $$a63 - 78
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000005097 440_0 $$021061$$aNutrient Cycling in Agroecosystems$$v85$$x1385-1314$$y1
000005097 500__ $$aThis project was commissioned by Germany's Federal Ministry of Food, Agriculture and Consumer protection (BMELV), the River Basin Commission Weser (RBC Weser) and the Federal States Bremen, Hessen, Niedersachsen, Nordrhein-Westfalen, Sachsen-Anhalt and Thuringen.
000005097 520__ $$aWe 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.
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000005097 65320 $$2Author$$aCatchment modelling
000005097 65320 $$2Author$$aEU-water framework directive
000005097 65320 $$2Author$$aIntegrative agro-economic-hydrologic model network
000005097 65320 $$2Author$$aMaximal permissible nitrogen surplus levels
000005097 65320 $$2Author$$aNitrate leaching
000005097 65320 $$2Author$$aNitrate concentration in percolation water
000005097 7001_ $$0P:(DE-HGF)0$$aBehrendt, H.$$b1
000005097 7001_ $$0P:(DE-HGF)0$$aGömann, H.$$b2
000005097 7001_ $$0P:(DE-HGF)0$$aHirt, U.$$b3
000005097 7001_ $$0P:(DE-HGF)0$$aKreins, P.$$b4
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000005097 7001_ $$0P:(DE-Juel1)129578$$aTetzlaff, B.$$b7$$uFZJ
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