Watershed-scale evaluation for land-based nonpoint source nutrients management in the Bohai Sea Bay, China
Watershed-scale evaluation for land-based nonpoint source nutrients management in the Bohai Sea Bay, China
复制标题
DOI：
10.1016/j.ocecoaman.2012.10.018
复制
发表时间：
2013-01-01
影响因子：
4.6
通讯作者：
Huang, Yaling
中科院分区：
文献类型：
--
作者：
Huang, Jinliang;Li, Qingsheng;Huang, Yaling
采用流域尺度方法对渤海湾陆源非点源营养物质进行了评估，渤海湾在中国区域尺度上具有至关重要的生态和经济作用。本研究首先确定了面积约为67.6万平方公里的渤海湾流域边界。对13个沿海城市、7个主要流域和5个近岸海域的陆源非点源营养物质的负荷及来源进行了量化。13个沿海城市的陆源非点源总氮（TN）和总磷（TP）负荷仅占进入渤海的陆源非点源总氮和总磷负荷的16.9%和12.5%。强调陆海统筹来管理进入渤海的陆源非点源总氮和总磷负荷。对于陆源非点源总氮负荷管理，应规范土壤流失、畜禽养殖；对于陆源非点源总磷负荷管理，应控制土壤流失、畜禽养殖和化肥使用。确定了几个陆源非点源总氮和总磷负荷的关键源区，应针对这些区域采取减少营养物质的管理措施。本研究结果有助于从整体角度深入了解渤海湾陆源非点源污染导致的水质问题，从而为渤海的陆源管理提供科学支持。（C）2012爱思唯尔有限公司。保留所有权利。
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. (C) 2012 Elsevier Ltd. All rights reserved.