Modelling scenarios to assess the effects of different agricultural management and land use options to reduce diffuse nitrogen pollution into the river Elbe
Modelling scenarios to assess the effects of different agricultural management and land use options to reduce diffuse nitrogen pollution into the river Elbe
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DOI：
10.1016/s1474-7065(03)00090-1
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发表时间：
2003-01-01
影响因子：
3.7
通讯作者：
Piorr, HP
中科院分区：
文献类型：
--
作者：
Kersebaum, KC;Steidl, J;Piorr, HP
欧洲水框架指令要求制定措施计划，管理计划和战略，以避免营养物质和其他有害物质对水的污染。在一个案例研究模型计算被用来评估不同的选择，土地利用，农业和水资源管理，以减少氮的摄入量，提高水和养分的阻滞在易北河流域。模型情景考虑了建议减少氮污染的措施，如有机农业，耕地转化为牧场，扩大草地生产和留出。此外，在适用的情况下，还考虑了通过水管理对以前排水区域进行再湿润。虽然不同的农业土地利用和管理方案之间的氮淋溶有明显的差异，但这些情景对根部区域排放的区域影响是公平的（最大值）。13%），因为其应用范围有限。但是，有针对性地应用的措施，在区域的高河流影响的风险来自地下水的停留时间和衰减计算导致显着减少氮输入到河流流量系统。水资源管理与农业生产规模化相结合，可使农业氮素排放量减少22%（4.400t/a）。可以确定具有高氮排放减少潜力的区域。这可能是在水框架指令内制定措施计划的相关信息。(C)2003爱思唯尔有限公司。保留所有权利。
The European Water Framework Directive requires the development of measure programs, management plans and strategies to avoid the water pollution with nutrients and other harmful matters. In a case study model calculations were used to evaluate different options of land use, agricultural and water management to reduce nitrogen immissions and enhance water and nutrient retardation in the Elbe river basin. The model scenarios consider measures which are recommended to reduce nitrogen pollution like organic farming, conversion of arable land into pasture, extensivation of grassland production and set aside. Additionally the rewetting of formerly drained areas by water management is considered where applicable. Although there are distinct differences in nitrogen leaching between the different agricultural land use and management options, the regional effects of the scenarios on the emissions from the root zone are only fair (max. 13%) because of their limited extent of application. But the targeted application of the measures in zones of high river impact risk derived from groundwater residence times and decay calculations lead to a distinct reduction of the nitrogen input into the river flow system. The combination of water management and extensivation of agricultural production can achieve a reduction of 22% (4.400 t/a) of the nitrogen immissions originated from agriculture. Areas with a high reduction potential for nitrogen immission can be identified. This can be a relevant information for the development of measure programs within the water framework directive. (C) 2003 Elsevier Ltd. All rights reserved.