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Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China
Huang, Wenmin1,2; Bi, Yonghong1; Hu, Zhengyu1; Zhu, Kongxian1,3; Zhao, Wei1,3; Yuan, Xigong1,3
2015-10-01
Source PublicationECOLOGICAL ENGINEERING
ISSN0925-8574
Volume83Issue:1Pages:28-32
Abstract

Damming has exerted far-reaching and profound impacts on ecological functions in river ecosystems. However, the "damming effects" on greenhouse gases (GHG) emissions from tributaries of reservoirs in subtropical region were largely overlooked. In this study, we assessed the GHG fluxes (CH4, CO2 and N2O) from air-water interface and the related factors in Xiangxi River of Three Gorges Reservoir (TGR) region over one year. The annual average fluxes of CH4, CO2 and N2O from Xiangxi River were 0.13 +/- 0.11 mg m(-2) h(-1), 16.01 +/- 23.21 mg m(-2) h(-1) and 21.57 +/- 12.75 mg m(-2) h(-1), respectively, which were significantly lower than those from tropical rivers or lakes. The GHG fluxes showed strong seasonal dynamics: CH4 was consistently released to the atmosphere and was more in summer than the other seasons. CO2 was absorbed from the atmosphere in spring, but was emitted the most in winter. N2O flux was higher in cold season than in warm season. Additionally, CH4 emission showed obvious spatial variations that decreased gradually from shallow to deep water-level areas. Correlation analysis demonstrated that CH4 emission was negatively correlated with water depth and air-water temperature difference, and positively with air temperature. CO2 flux was negatively related to chlorophyll a (Chl. a) and N2O flux was negatively correlated with dissolved oxygen (DO). The present study will deepen our understanding of Three Gorges Dam (TGD) construction impacts on GHG emissions in the tributaries, and help us to better estimate GHG emissions for TGR. (C) 2015 Elsevier B.V. All rights reserved.

SubtypeArticle
KeywordXiangxi River Ch4 Co2 N2o Spatio-temporal Variation Three Gorges Reservoir
DOI10.1016/j.ecoleng.2015.04.088
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Technology
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Engineering
WOS SubjectEcology ; Engineering, Environmental ; Environmental Sciences
WOS IDWOS:000360812000005
WOS KeywordNITROUS-OXIDE N2O ; CARBON-DIOXIDE ; GREENHOUSE GASES ; HYDROELECTRIC RESERVOIR ; METHANE ; LAKE ; CO2 ; MITIGATION ; SYSTEM ; FLUXES
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/27193
Collection藻类生物学及应用研究中心_期刊论文
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Huang, Wenmin,Bi, Yonghong,Hu, Zhengyu,et al. Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China[J]. ECOLOGICAL ENGINEERING,2015,83(1):28-32.
APA Huang, Wenmin,Bi, Yonghong,Hu, Zhengyu,Zhu, Kongxian,Zhao, Wei,&Yuan, Xigong.(2015).Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China.ECOLOGICAL ENGINEERING,83(1),28-32.
MLA Huang, Wenmin,et al."Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China".ECOLOGICAL ENGINEERING 83.1(2015):28-32.
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