Combined effects of multiple large-scale hydraulic engineering on water stages in the middle Yangtze River

doi:10.1016/j.geomorph.2017.09.034

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	Combined effects of multiple large-scale hydraulic engineering on water stages in the middle Yangtze River
	Han, Jianqiao 1,2; Sun, Zhaohua 1,2; Li, Yitian 2; Yan, Yunping 3; Sun, ZH (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China.
刊名	GEOMORPHOLOGY
	2017
卷号	298 页码:31-40
关键词	Yangtze River Water Stages Hydraulic Engineering Specific-gauge Analysis
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2017.09.034
文献子类	Article
英文摘要	Investigation 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.
学科主题	Physical Geography ; Geology
URL标识	查看原文
出版地	AMSTERDAM
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000415771900003
资助机构	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] ; 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] ; 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] ; 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]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7880]
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Sun, ZH (reprint author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China.
作者单位	1.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
推荐引用方式 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.