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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
2018-11-01
发表期刊SUSTAINABILITY
ISSN2071-1050
卷号10期号:11页码:17
摘要Spanning 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.
关键词suspended sediment concentration Three Gorges Dam riverbank collapse impoundment
DOI10.3390/su10114093
资助者Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province
关键词[WOS]CHANGJIANG RIVER ; RESERVOIR ; WATER ; TRANSPORT ; PROJECT ; IMAGERY ; LAKE ; LOAD ; VARIABILITY ; DEPOSITION
语种英语
资助项目Youth 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]
资助者Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province ; Open Fund Key Laboratory of Petroleum Resources of Gansu Province
WOS研究方向Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS类目GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY ; Environmental Sciences ; Environmental Studies
WOS记录号WOS:000451531700267
出版者MDPI
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90306
专题兰州油气中心
通讯作者Yang, Liang Emlyn
作者单位1.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
推荐引用方式
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):17.
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),17.
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):17.
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