Water erosion and phosphorus problems in an agricultural catchment—Need for natural research for implementation of the EU Water Framework Directive
Water erosion and phosphorus problems in an agricultural catchment—Need for natural research for implementation of the EU Water Framework Directive
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DOI：
10.1016/j.envsci.2005.06.005
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发表时间：
2005-10
影响因子：
6
通讯作者：
B. Ulén;Teresa Kalisky
中科院分区：
文献类型：
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作者：
B. Ulén;Teresa Kalisky
在瑞典中部进行了一项关于侵蚀和磷问题的研究，该地区侵蚀非常明显，并对水质产生负面影响。 Mässingsboån 流域以农业为主，受纳的 Brunnsjön 湖遭受富营养化。建立了地方示范区，并与当地个人联系以激励行动，并提供为期两年的地方补贴。为减少湖泊磷负荷而确定和/或实施的措施分为：（1）提高土壤肥力并最大限度地减少水土流失； (2) 河流处或河流中的措施； (3) 湖内措施； (4)单户污水处理系统的改进。事实证明，提高团聚体稳定性的土壤管理可以显着减少土壤侵蚀和颗粒结合磷的损失。此外，高土壤肥力通常与良好的团聚稳定性相关。在溪流和湖泊中进行的当地实验不太成功，需要进行更多研究。经计算，在不引起过度富营养化的情况下，注入湖泊的水的最大磷浓度与耕地背景磷浓度（0.05mgl−1）相似。
A study of erosion and phosphorus problems was carried out in central Sweden in an area with very visible erosion and negative offsite effects on water quality. The Mässingsboån catchment is dominated by agriculture and the recipient Lake Brunnsjön suffers from eutrophication. Local demonstration areas were established and local personal contacts to motivate action and local subsidies were financed for 2 years. Measures identified and/or implemented to reduce phosphorous load on the lake were grouped into: (1) improved soil fertility and minimising of soil erosion; (2) measures at or in the stream; (3) measures in the lake itself; (4) improvements of single household wastewater treatment systems. Soil management that improved aggregate stability was demonstrated to significantly reduce soil erosion and loss of particulate-bound phosphorus. In addition, high soil fertility was generally associated with good aggregate stability. Local experiments in the stream and in the lake were less successful and more research is needed. Maximum phosphorus concentration for water loading the lake without causing excessive eutrophication was calculated to be similar to the background phosphorus concentration from arable land (0.05mgl−1).