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Spatio-Temporal Patterns and Impacts of Sediment Variations in Downstream of the Three Gorges Dam on the Yangtze River, China
Chen, Jilong1,2,3,4; Fang, Xinrui1; Wen, Zhaofei1; Chen, Qiao1,2; Ma, Maohua1; Huang, Yuanyang1; Wu, Shengjun1; Yang, Liang Emlyn5,6
Corresponding AuthorYang, Liang Emlyn(lyang@gshdl.uni-kiel.de)
2018-11-01
Source PublicationSUSTAINABILITY
ISSN2071-1050
Volume10Issue:11Pages:4093
SubtypeArticle
Contribution Rank6
AbstractSpanning the Yangtze River of China, the Three Gorges Dam (TGD) has received considerable concern worldwide with its potential impacts on the downstream side of the dam. This work investigated the spatio-temporal variations of suspended sediment concentration (SSC) at the downstream section of Yichang-to-Chenglingji from 2002 to 2015. A random forest model was developed to estimate SSC using MODIS ground reflectance products, and the spatio-temporal distributions of SSC were retrieved with this model to investigate the characteristics of water-silt variation. Our results revealed that, relatively, SSC before 2003 was evenly distributed in the downstream Yangtze River, while this spatial distribution pattern changed ce 2003 when the dam started storing water. Temporally, the SSC demonstrated a W-shaped curve of seasonal variation as one peak occurred in September and two troughs in March and November, and showed a significantly decreasing trend after three-stage impoundment. After official operation of the TGD in 2009, the SSC was reduced by over 40% than before 2003. Spatially, the most significant changes occurred in the upper Jingjiang section, where the SSC dropped by 45%. During all stages of impoundment, the water impoundment to 135 m in 2003 had the most significant impact on suspended sediment. The decreased SSC has led to emerging risks of bank failure, aggravated erosion of water front and aggressive down-cutting erosion along the downstream of the dam, as well as other ecological and environmental issues that require urgent attention by the government.
Keywordsuspended sediment concentration Three Gorges Dam riverbank collapse impoundment
DOI10.3390/su10114093
Indexed BySCI
WOS KeywordCHANGJIANG RIVER ; RESERVOIR ; WATER ; TRANSPORT ; PROJECT ; IMAGERY ; LAKE ; LOAD ; VARIABILITY ; DEPOSITION
Language英语
Funding ProjectYouth Innovation Promotion Association, Chinese Academy of Sciences[2018417] ; National Natural Science Foundation of China[41501096] ; National Natural Science Foundation of China[31601211] ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province[SZDKFJJ20160605]
WOS Research AreaScience & Technology - Other Topics ; Environmental Sciences & Ecology
WOS SubjectGREEN & SUSTAINABLE SCIENCE & TECHNOLOGY ; Environmental Sciences ; Environmental Studies
WOS IDWOS:000451531700267
Funding OrganizationYouth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province
PublisherMDPI
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24748
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorYang, Liang Emlyn
Affiliation1.Chongqing Inst Green & Intelligent Technol, Chongqing 401122, Peoples R China;
2.Chinese Acad Sci, Key Lab Water Environm Reservoir Watershed, Chongqing 401122, Peoples R China;
3.Inst Geol & Geophys, Key Lab Petr Resources Gansu Prov, Lanzhou 730099, Gansu, Peoples R China;
4.Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou 730099, Gansu, Peoples R China;
5.Christian Albrechts Univ Kiel, Grad Sch Human Dev Landscapes, D-24118 Kiel, Germany;
6.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China
Corresponding 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
Chen, Jilong,Fang, Xinrui,Wen, Zhaofei,et al. Spatio-Temporal Patterns and Impacts of Sediment Variations in Downstream of the Three Gorges Dam on the Yangtze River, China[J]. SUSTAINABILITY,2018,10(11):4093.
APA Chen, Jilong.,Fang, Xinrui.,Wen, Zhaofei.,Chen, Qiao.,Ma, Maohua.,...&Yang, Liang Emlyn.(2018).Spatio-Temporal Patterns and Impacts of Sediment Variations in Downstream of the Three Gorges Dam on the Yangtze River, China.SUSTAINABILITY,10(11),4093.
MLA Chen, Jilong,et al."Spatio-Temporal Patterns and Impacts of Sediment Variations in Downstream of the Three Gorges Dam on the Yangtze River, China".SUSTAINABILITY 10.11(2018):4093.
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