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  • Berlin VÖBB/ZLB  (2)
  • 1
    UID:
    kobvindex_ZLB34009490
    Format: 1 Online-Ressource (314 Seiten) , Illustrationen, Karten , 13,41 MB
    ISBN: 9783865761538
    Series Statement: Thünen Report 37
    Content: Seit dem Jahr 2000 bestehen in der Europäischen Union durch die Wasserrahmenrichtlinie Wasserqualitätsziele für Grundwasser sowie Oberflächen- und Küstengewässer. Für Niedersachsen wurden alle relevanten diffusen und punktuellen Nährstoffeinträge, -frachten und der erforderliche Reduktionsbedarf mit dem AGRUM-Modellverbund, bestehend aus dem Agrarsektormodell RAUMIS, dem Modellsystem GROWA/WEKU/DENUZ/MEPHOS sowie dem Nährstofftransportmodell MONERIS, abgebildet. Aufbauend auf dem Basisjahr 2007 wurde die Eintragssituation 2021 simuliert. Berücksichtigt wurden unter anderem die Düngevorordnung (DüV 2006) sowie die Agrarumweltprogramme 2007 bis 2013, die weitere Entwicklung der Agrarmärkte und der Agrarpolitik. Die Ergebnisse zeigen, dass unter Berücksichtigung der bisherigen Maßnahmen die Wasserqualitätsziele in Niedersachsen bis 2021 nicht flächendeckend erreicht werden. Als ergänzende Maßnahmen zeigen Agrarumweltmaßnahmen, die auf eine Reduktion der Stickstoffbilanzüberschüsse zur Verbesserung der Wasserqualität abzielen, in einigen Regionen gute Reduktionspotenziale. In anderen Regionen wäre eine Ausweitung auf die gesamte landwirtschaftliche Fläche jedoch nicht ausreichend, um die Qualitätsziele zu erreichen. Insbesondere in diesen Regionen ist aufgrund einer intensiven landwirtschaftlichen Produktion, hoher Produktionserlöse und des Flächennutzungsdrucks eine Zunahme der bisherigen Förderflächen nicht realistisch. Es müssen daher weitere Handlungsoptionen in Betracht gezogen werden, um die gesetzten Ziele zu erreichen.
    Content: Since 2000 the Water Framework Directive defines water quality targets for groundwater, surface water bodies and coastal waters in the European Union. Employing the model network AGRUM, consisting of the agricultural sector models RAUMIS, the model system GROWA, DENUZ/WEKU, MEPhos and the nutrient transfer model MONERIS, all relevant diffuse and point source nutrient inputs and loads have been simulated for the Federal State of Lower Saxony. The nutrient input situation in 2021 was modelled based on the reference year 2007. Thereby the Fertilizer Directive of 2006, the agri-environmental programs in the period of 2007 to 2013, the future development of the agricultural markets and of agricultural policy have been taken into account. The results predict that the measures and actions already implemented and adopted are not adequate for Lower Saxony to achieve the water quality targets of the Water Framework Directive state wide until 2021. Agri-environmental measures designed to reduce nitrogen balance surpluses on agricultural land and improve water quality, as complementary measures, show a high reduction potential. In other regions an extension of agri-environmental measures to the entire agricultural area of the region might be insufficient to achieve the quality targets. Especially in these regions an increase of the existing area of agri-environmental measures is not realistic due to high intensity agricultural production, a high income and the existing land use pressure. Therefore it is necessary to consider further options for action.
    Language: German
    Keywords: Bericht
    Author information: Kunkel, Ralf
    Author information: Kreins, Peter
    Author information: Venohr, Markus
    Author information: Heidecke, Claudia
    Author information: Hirt, Ulrike
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    UID:
    kobvindex_ZLB34004092
    Format: 1 Online-Ressource (383 Seiten) , Diagramme, Karten , 12,45 MB
    ISBN: 9783865761200
    Series Statement: Thünen Report 21
    Note: Kurzfassung/Abstract auch in Englisch (Seite i) , The aim of the European Water Framework Directive is the achievement of a good ecological or rather ecological potential and chemical status for surface waters, as well as a good chemical and quantitative status for groundwater until 2015. For the river basin Weser the target concentrations will not be achieved by 2015. For exemptions extended deadlines until 2021 and 2027 are possible. Hence the aim of the AGRUM+ project is to analyze nutrient inputs and nutrient concentrations until 2021 and to conduct scientific analysis for the design of measure plans and their implementation. For this the AGRUM Weser model network consisting of the models RAUMIS, GROWA, DENUZ/WEKU, MEPhos and MONERIS is further developed and adapted. Results show that the past trend of decline of nutrient surpluses will be further continued until 2021 which also leads to a reduction of nutrient inputs into ground and surface waters. Nevertheless, in the baseline 2021 the target concentrations for the nutrients nitrate and phosphorous for ground- and surface water will not be achieved even considering an impact delay. The amount of necessary measures and the regional hot-spots of measures show that an increase in agri-environmental measures as well as a moderate intensification of the manure regulation will not be sufficient to achieve the water protection targets.
    Language: German
    Author information: Kunkel, Ralf
    Author information: Kreins, Peter
    Author information: Venohr, Markus
    Author information: Heidecke, Claudia
    Author information: Hirt, Ulrike
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
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