IMHE OpenIR  > 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, Xiaoxiao1,2; Zhou, Jun1; Bing, Haijian1; Sun, Hongyang1; Wang, Jipeng1,2
Corresponding AuthorWu Yanhong
2016
Source PublicationENVIRONMENTAL POLLUTION
ISSN0269-7491
EISSN1873-6424
Volume214Pages:282-289
SubtypeArticle
AbstractThe 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.
KeywordPhosphorus Fractions Bioavailable Sediment Three Gorges Reservoir
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.envpol.2016.04.029
URL查看原文
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordWATER-LEVEL FLUCTUATION ; LAKE-SEDIMENTS ; YANGTZE-RIVER ; NUTRIENT ; FRACTIONS ; RELEASE ; SPECIATION ; RETENTION ; SURFACE ; ZONE
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000378448600032
Funding OrganizationScience and Technology Service Network Initiative of the Chinese Academy of Sciences(KFJ-EW-STS-008) ; Chinese Academy of Sciences (CAS "Light of West China" Program)
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Cited Times:54[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/15118
Collection山地表生过程与生态调控重点实验室
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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