Tracking Nitrogen Sources, Transformation, and Transport at a Basin Scale with Complex Plain River Networks

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Tracking Nitrogen Sources, Transformation, and Transport at a Basin Scale with Complex Plain River Networks
	Shi, Wenqing; Yi, Qitao; Chen, Quwen; Hu, Liuming
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2017-05-16
卷号	51 期号:10 页码:5396-5403
英文摘要	This research developed an innovative approach to reveal nitrogen sources, transformation, and transport in large and complex river networks in the Taihu Lake basin using measurement of dual stable isotopes of nitrate. The spatial patterns of delta N-15 corresponded to the urbanization level, and the nitrogen cycle was associated with the hydrological regime at the basin level. During the high flow season of summer, nonpoint sources from fertilizer/soils and atmospheric deposition constituted the highest proportion of the total nitrogen load. The point sources from sewage/manure, with high ammonium concentrations and high delta N-15 and delta O-18 contents in the form of nitrate, accounted for the largest inputs among all sources during the low flow season of winter. Hot spot areas with heavy point source pollution were identified, and the pollutant transport routes were revealed. Nitrification widely during the warm seasons, with decreased delta O-18 values; whereas great potential for denitrification existed during the low flow seasons of autumn and spring. The study showed that point source reduction could have effects over the short-term; however, long-term efforts to substantially control agriculture nonpoint sources are essential to eutrophication alleviation for the receiving lake, which clarifies the relationship between point and nonpoint source control.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39562]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Shi, Wenqing,Yi, Qitao,Chen, Quwen,et al. Tracking Nitrogen Sources, Transformation, and Transport at a Basin Scale with Complex Plain River Networks[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017,51(10):5396-5403.
APA	Shi, Wenqing,Yi, Qitao,Chen, Quwen,&Hu, Liuming.(2017).Tracking Nitrogen Sources, Transformation, and Transport at a Basin Scale with Complex Plain River Networks.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(10),5396-5403.
MLA	Shi, Wenqing,et al."Tracking Nitrogen Sources, Transformation, and Transport at a Basin Scale with Complex Plain River Networks".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.10(2017):5396-5403.