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000060016 084__ $$2WoS$$aEngineering, Environmental
000060016 084__ $$2WoS$$aEnvironmental Sciences
000060016 084__ $$2WoS$$aWater Resources
000060016 1001_ $$0P:(DE-Juel1)VDB4997$$aWendland, F.$$b0$$uFZJ
000060016 245__ $$aWater fluxes and diffuse nitrate pollution at the river basin scale: Interfaces for the coupling of agroeconomical models with hydrological approaches
000060016 260__ $$aLondon$$bIWA Publishing$$c2007
000060016 300__ $$a133 - 142
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000060016 520__ $$aAn integrated model system has been developed to estimate the impact of nitrogen reduction measures on the nitrogen load in groundwater and in river catchment areas. The focus lies on an area-wide, regionally differentiated, consistent link-up between the indicator "nitrogen balance surplus" and nitrogen charges into surface waters. As a starting point of the analysis actual nitrogen surpluses in the soil were quantified using the agro-economic RAUMIS-model, which considers the most important N-inputs to the soil and N-removals from the soil through crop harvest. The most important pathways for diffuse nitrogen inputs into river systems are modelled with the water balance model GROWA. Additionally, the time-dependent nitrogen degradation along the nitrogen pathways in soil and groundwater are modelled using the WEKU-model. The two selected river basins in Germany cover a variety of landscape units with different hydrological, hydrogeological and socio-economic characteristics. The results indicate a wide range of annual nitrogen surpluses for the rural areas between than 10 kg N ha(-1).a(-1) and 200 kg N ha(-1).a(-1) or more, depending on the type and intensity of farming. The level of nitrogen inputs into the surface waters is reduced because of degradation processes during transport in soil and groundwater. Policy impact analyses for a nitrogen tax and a limitation of the livestock density stress the importance of regionally adjusted measures.
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000060016 65320 $$2Author$$aagro-environmental policy evaluation
000060016 65320 $$2Author$$adenitrification
000060016 65320 $$2Author$$adiffuse water pollution
000060016 65320 $$2Author$$amulticriteria assessment
000060016 65320 $$2Author$$anitrate leaching
000060016 65320 $$2Author$$ariver basin management
000060016 7001_ $$0P:(DE-Juel1)VDB4996$$aKunkel, R.$$b1$$uFZJ
000060016 7001_ $$0P:(DE-HGF)0$$aGömann, H.$$b2
000060016 7001_ $$0P:(DE-HGF)0$$aKreins, P.$$b3
000060016 773__ $$0PERI:(DE-600)2024780-1$$a10.2166/wst.2007.081$$gVol. 55, p. 133 - 142$$p133 - 142$$q55<133 - 142$$tWater science and technology$$v55$$x0273-1223$$y2007
000060016 8567_ $$uhttp://dx.doi.org/10.2166/wst.2007.081
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000060016 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000060016 9141_ $$y2007
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