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	Fluvial diversity in relation to valley setting in the source region of the Yangtze and Yellow Rivers
	Yu G. A. ; Liu L. ; Li Z. W. ; Li Y. F. ; Huang H. Q. ; Brierley G. ; Blue B. ; Wang Z. Y. ; Pan B. Z.
	2013
关键词	valley setting fluvial morphology river patterns spatial distribution source region of the Yangtze and Yellow Rivers riparian vegetation channel morphology alluvial rivers tibetan plateau single-thread evolution dynamics patterns classification adjustments
英文摘要	The spatial distribution of valley setting (laterally-unconfined, partly-confined, or confined) and fluvial morphology in the source region of the Yangtze and Yellow Rivers is contrasted and analyzed. The source region of the Yangtze River is divided into 3 broad sections (I, II and III) based on valley setting and channel gradient, with the upstream and downstream sections being characterized by confined (some reaches partly-confined) valleys, while the middle section is characterized with wide and shallow, laterally-unconfined valleys. Gorges are prominent in sections I and III, while braided channel patterns dominate section II. By contrast, the source region of the Yellow River is divided into 5 broad sections (sections I-V) based on valley characteristics and channel gradient. Sections I, II and IV are alluvial reaches with mainly laterally-unconfined (some short reaches partly-confined) valleys. Sections III and V are mainly confined or partly-confined. Greater morphological diversity is evident in the source region of the Yellow River relative to the upper Yangtze River. This includes braided, anabranching, anastomosing, meandering and straight alluvial patterns, with gorges in confined reaches. The macro-relief (elevation, gradient, aspect, valley alignment and confinement) of the region, linked directly to tectonic movement of the Qinghai-Tibet Plateau, tied to climatic, hydrologic and biotic considerations, are primary controls upon the patterns of river diversity in the region.
出处	Journal of Geographical Sciences
卷	23
期	5
页	817-832
收录类别	SCI
语种	英语
ISSN号	1009-637X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30081]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yu G. A.,Liu L.,Li Z. W.,et al. Fluvial diversity in relation to valley setting in the source region of the Yangtze and Yellow Rivers. 2013.

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