The fate of phosphorus in sediments after the full operation of the Three Gorges Reservoir, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	The fate of phosphorus in sediments after the full operation of the Three Gorges Reservoir, China
	Wu, Yanhong1 ; Wang, Xiaoxiao 1,2; Zhou, Jun1 ; Bing, Haijian1 ; Sun, Hongyang1 ; Wang, Jipeng1,2
刊名	ENVIRONMENTAL POLLUTION
	2016-07-01
卷号	214 页码:282-289
关键词	Phosphorus Fractions Bioavailable Sediment Three Gorges Reservoir
ISSN号	0269-7491
通讯作者	Wu Yanhong
英文摘要	The hydro-dynamic conditions have been changed after the impoundment of Three Gorges Reservoir (TGR), which result in changes of phosphorus (P) distribution in sediments. To investigate the variation and storage of P in the surface sediments of the TGR, continuously and intermittently submerged sediment samples were collected from 14 sites in 2014, and P fractions were analyzed using a modified Hedley sequential extraction method. The results showed that the concentrations of total P (TP) (904 +/- 105 mg/kg) in the sediments did not exhibit an apparent spatial trend. A decreasing trend of bioavailable P (Bio-P) concentration in the continuously submerged sediment (177 +/- 29 mg/kg) was observed from Fuling to Zigui, while an opposite trend appeared in the intermittently submerged sediment (139 +/- 49 mg/kg) from Jiangjin to Zigui. The water depth and sediment grain size had important implications for the variation of the Bio-P in the sediments along the TGR. After the full operation of the TGR, the concentration of TP in the intermittently submerged sediment from Fengjie to Zigui was significantly higher in 2014 compared with that in 2009. The continuously submerged sediment is a major P pool of the TGR with an annual Bio-P deposition flux of 2.14 x 10(4) t/a, of which 87% was retained in the reaches from Fuling to Zigui. Considering the slow release of P from the sediment (0.16-2.75 t/a), the sediment has been a P "sink" since the full operation of the TGR in 2010. (C) 2016 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	WATER-LEVEL FLUCTUATION ; LAKE-SEDIMENTS ; YANGTZE-RIVER ; NUTRIENT ; FRACTIONS ; RELEASE ; SPECIATION ; RETENTION ; SURFACE ; ZONE
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S0269749116302950
语种	英语
WOS记录号	WOS:000378448600032
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/15118]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yanhong,Wang, Xiaoxiao,Zhou, Jun,et al. The fate of phosphorus in sediments after the full operation of the Three Gorges Reservoir, China[J]. ENVIRONMENTAL POLLUTION,2016,214:282-289.
APA	Wu, Yanhong,Wang, Xiaoxiao,Zhou, Jun,Bing, Haijian,Sun, Hongyang,&Wang, Jipeng.(2016).The fate of phosphorus in sediments after the full operation of the Three Gorges Reservoir, China.ENVIRONMENTAL POLLUTION,214,282-289.
MLA	Wu, Yanhong,et al."The fate of phosphorus in sediments after the full operation of the Three Gorges Reservoir, China".ENVIRONMENTAL POLLUTION 214(2016):282-289.