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Watershed-scale evaluation for land-based nonpoint source nutrients management in the Bohai Sea Bay, China

机译：渤海湾陆上非点源养分管理的流域规模评价

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摘要

A watershed-scale approach was used to evaluate the land-based nonpoint source nutrients in the Bohai Sea Bay, which plays a vital ecological and economic role on regional scale in China. This study firstly defined the watershed boundary of the Bohai Sea Bay with an area of approximately 676,000 sq km. Loads and source apportionment of land-based nonpoint source nutrients from the 13 coastal cities, seven major watersheds, and five sub-sea areas were quantified. The land-based nonpoint source total nitrogen (TN) and total phosphorus (TP) loads from the 13 coastal cities contributed only 16.9% and 12.5% of the total land-based nonpoint source TN and TP loads entering the Bohai Sea. Land-sea integration was highlighted for managing land-based nonpoint source TN and TP loads entering the Bohai Sea. Soil losses, livestock and poultry breeding should be regulated for land-based nonpoint source TN load management while soil losses, livestock and fertilizer use should be controlled for land-based nonpoint source TP load management. Several critical source areas for land-based nonpoint source TN and TP loads were identified where management measures to reduce nutrient should be directed. The findings of this study would be helpful in gaining insights into water quality issues derived from land-based nonpoint source pollution in the BSBW from a holistic perspective, thereby providing scientific support for land-based management in the Bohai Sea.
机译：运用分水岭规模的方法来评估渤海湾陆基非点源养分，这在中国区域尺度上起着至关重要的生态和经济作用。这项研究首先确定了渤海湾的分水岭边界，面积约676,000平方公里。对来自13个沿海城市，7个主要流域和5个海底区域的陆面非点源养分的负荷和源分配进行了量化。来自13个沿海城市的陆基非点源总氮（TN）和总磷（TP）负荷仅占进入渤海的陆基非点源TN和TP总负荷的16.9％和12.5％。强调了陆海一体化，以管理进入渤海的陆基非点源TN和TP负荷。对于陆基非点源TN负荷管理，应规范水土流失，畜禽养殖业，而对陆基非点源TP负荷管理应控制土壤损失，畜牧和肥料使用。确定了陆上非点源TN和TP负荷的几个关键源区域，应在这些区域内采取减少养分的管理措施。这项研究的结果将有助于从整体角度深入了解水生生物多样性公约中陆地非面源污染引起的水质问题，从而为渤海陆地管理提供科学支持。

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  • 来源
    《Ocean & coastal management》 |2013年第1期|314-325|共12页
  • 作者

    Jinliang Huang; Qingsheng Li; Ling Huang; Zhifeng Zhang; Jingli Mu; Yaling Huang;

  • 作者单位

    Coastal and Ocean Management Institute, Xiamen University, Xiamen 361005, China,College of the Environment and Ecology, Xiamen University, Xiamen 361005, China;

    College of the Environment and Ecology, Xiamen University, Xiamen 361005, China;

    College of the Environment and Ecology, Xiamen University, Xiamen 361005, China;

    National Marine Environmental Monitoring Center, Dalian 116021, China;

    National Marine Environmental Monitoring Center, Dalian 116021, China;

    College of the Environment and Ecology, Xiamen University, Xiamen 361005, China;

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