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Combined effects of multiple large-scale hydraulic engineering on water stages in the middle Yangtze River
Han, Jianqiao1,2; Sun, Zhaohua1,2; Li, Yitian2; Yan, Yunping3; Sun, ZH (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China.
SubtypeArticle
2017
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
description.correspondentemailzhsun@whu.edu.cn
Volume298Pages:31-40
AbstractInvestigation of water stages influenced by human projects provides better understanding of riverine geomorphological processes and river management. Based on hydrological data collected over similar to 60 years, an extreme stage-extreme discharge analysis and a specific-gauge analysis were performed to research the individual and combined effects of multiple engineering projects on a long-term time series of water stages in the middle Yangtze River. Conclusions are as follows. (1) In accordance with the operation years of the Jingjiang cutoff (CF), the Gezhouba Dam (GD), and the Three Gorges Dam (TGD), the time series (1955-2012) was divided into periods of P1 (1955-1970), P2 (1971-1980), P3 (1981-2002), and P4 (2003-2012). Water stage changes during P1-P2, P2-P3, and P3-P4 are varied because of the differences in the types and scales of these projects. The stage decreased at Shashi and increased at Luoshan owing to the operation of the CF. Additionally, after the GD was constructed, the low-flow stage decreased in the upstream reach of Chenglingji and increased in its downstream reach, whereas the flood stage merely decreased at Yichang. Moreover, the TGD resulted in an overall decrease in low-flow stages and a limited increase in flood stages because of the differential adjustments of river geometry and resistance between the low-flow channel and flood channel. (2) Although differences existed in the scouring mechanisms between streamwise erosion associated with dams and headward erosion associated with cutoffs, particular bed textures in the gravel reach led to a similar adjustment that stage reduction at Shashi was the greatest of all stations, which caused the flow slope and sediment transport capacity to decrease in the sandy reach. (3) These engineering projects caused changes in average low-flow and flood stages that varied between Yichang (-1.58 and -0.08 m respectively), Shashi (-3.54 and -0.12 m), and Luoshan (1.15 and 0.97 m) from P1 to P4. However, less influence was observed at Hankou owing to its remote location and the short impoundment time of the TGD. (4) Potentially detrimental decreases in low-flow stages and increases in flood stages should be monitored and managed in the future. Our results are of practical significance for river management and the evaluation of the influences of large-scale anthropogenic activities on the hydrological regimes of large rivers. (C) 2017 Elsevier B.V. All rights reserved.
KeywordYangtze River Water Stages Hydraulic Engineering Specific-gauge Analysis
Subject AreaPhysical Geography ; Geology
DOI10.1016/j.geomorph.2017.09.034
URL查看原文
Indexed BySCI
Publication PlaceAMSTERDAM
Language英语
WOS IDWOS:000415771900003
PublisherELSEVIER SCIENCE BV
Funding OrganizationNational Science Foundation of China [51579185, 51339001]; Doctoral Foundation of Northwest AF University [2452015337]; Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ4011] ; National Science Foundation of China [51579185, 51339001]; Doctoral Foundation of Northwest AF University [2452015337]; Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ4011]
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7880
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorSun, ZH (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China
2.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China
3.Minist Transport, Key Lab Engn Sediment, Tianjin Res Inst Water Transport Engn, Tianjin, Peoples R China
Recommended Citation
GB/T 7714
Han, Jianqiao,Sun, Zhaohua,Li, Yitian,et al. Combined effects of multiple large-scale hydraulic engineering on water stages in the middle Yangtze River[J]. GEOMORPHOLOGY,2017,298:31-40.
APA Han, Jianqiao,Sun, Zhaohua,Li, Yitian,Yan, Yunping,&Sun, ZH .(2017).Combined effects of multiple large-scale hydraulic engineering on water stages in the middle Yangtze River.GEOMORPHOLOGY,298,31-40.
MLA Han, Jianqiao,et al."Combined effects of multiple large-scale hydraulic engineering on water stages in the middle Yangtze River".GEOMORPHOLOGY 298(2017):31-40.
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