Fluvial diversity in relation to valley setting in the source region of the Yangtze and Yellow Rivers
查看参考文献59篇
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文摘
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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. |
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来源
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Journal of Geographical Sciences
,2013,23(5):817-832 【核心库】
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DOI
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10.1007/s11442-013-1046-2
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关键词
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valley setting
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fluvial morphology
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river patterns
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spatial distribution
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source region of the Yangtze and Yellow Rivers
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地址
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1.
Institute of Geographic Sciences and Natural Resources Research, CAS, Key Laboratory of Water Cycle and Related Land Surface Processes, CAS, Beijing, 100101
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Tsinghua University, State Key Laboratory of Hydroscience and Engineering, Beijing, 100084
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School of Environment, University of Auckland, New Zealand, Auckland, 92019
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Changjiang River Scientific Research Institute, Wuhan, 430010
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1009-637X |
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学科
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自然地理学 |
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基金
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国家自然科学基金
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International Science & Technology Cooperation Program of China
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文献收藏号
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CSCD:5021273
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