干旱区生态环境知识资源中心(Arid): Variations in Channel Centerline Migration Rate and Intensity of a Braided Reach in the Lower Yellow River

Arid

DOI	10.3390/rs13091680
	Variations in Channel Centerline Migration Rate and Intensity of a Braided Reach in the Lower Yellow River
	Xia, Junqiang; Wang, Yingzhen; Zhou, Meirong; Deng, Shanshan; Li, Zhiwei; Wang, Zenghui
通讯作者	Xia, JQ (corresponding author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:9
英文摘要	The Yellow River (YR) covers three climatic zones including arid region, semi-arid region and temperate monsoon region, with frequent appearance of flow intermittence in the Lower Yellow River (LYR) before 1999. Channel migration occurs frequently in braided rivers, which is a major focus of study in geomorphology and river dynamics. The braided reach in the LYR is featured by a complexly spatio-temporal variation in channel migration parameters owing to the varying condition of flow and sediment. It is crucial to investigate the migration characteristics of channel centerline for the sake of fully understanding channel evolution. A detailed calculation procedure is proposed to quantify migration rates and intensities of channel centerline at section- and reach-scales, using the measurements of remote sensing images and cross-sectional topography. Migration rates and intensities of channel centerline at section- and reach-scales from 1986 to 2016 were calculated, with the characteristics and key factors to control the migration intensity of channel centerline being identified quantitatively. Calculated results indicate that: (i) the mean probability of centerline migrating toward the left side was approximately equal to the probability of rightward migration from a long-term sequence; (ii) the mean reach-scale migration rate of channel centerline was reduced from 410 m/yr in 1986-1999 to 185 m/yr in 1999-2016, with a reduction of 55% owing to the Xiaolangdi Reservoir operation in 1999, and the mean reach-scale migration intensity of channel centerline was decreased from 0.28 to 0.16 m/(yr center dot m), with a reduction of 43%; (iii) the incoming flow-sediment regime was a dominant factor affecting the degree of channel migration, although the channel boundary conditions could influence the intensity of channel migration; and (iv) the reach-scale migration intensity of channel centerline can be written as a power function of the previous two-year average incoming sediment coefficient or fluvial erosion intensity, and the reach-scale migration intensities of channel centerline calculated using the proposed relations are generally in close agreement with the measurements over the period of 30 years.
英文关键词	channel centerline migration rate migration intensity braided reach Lower Yellow River
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000650737200001
WOS关键词	SEDIMENT RATING CURVES ; FLUVIAL PROCESSES ; YANGTZE-RIVER ; GEOMETRY ; WATER ; WIDTH ; ADJUSTMENTS ; SIMULATION ; FLOODPLAIN ; MORPHOLOGY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351516
作者单位	[Xia, Junqiang; Wang, Yingzhen; Zhou, Meirong; Deng, Shanshan; Li, Zhiwei; Wang, Zenghui] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China; [Wang, Zenghui] Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xia, Junqiang,Wang, Yingzhen,Zhou, Meirong,et al. Variations in Channel Centerline Migration Rate and Intensity of a Braided Reach in the Lower Yellow River[J]. 西北农林科技大学,2021,13(9).
APA	Xia, Junqiang,Wang, Yingzhen,Zhou, Meirong,Deng, Shanshan,Li, Zhiwei,&Wang, Zenghui.(2021).Variations in Channel Centerline Migration Rate and Intensity of a Braided Reach in the Lower Yellow River.REMOTE SENSING,13(9).
MLA	Xia, Junqiang,et al."Variations in Channel Centerline Migration Rate and Intensity of a Braided Reach in the Lower Yellow River".REMOTE SENSING 13.9(2021).