Fluvial diversity in relation to valley setting in the source region of the Yangtze and Yellow Rivers
Fluvial diversity in relation to valley setting in the source region of the Yangtze and Yellow Rivers
复制标题
长江、黄河源区河流多样性与河谷环境的关系
DOI：
10.1007/s11442-013-1046-2
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发表时间：
2013-08
影响因子：
4.9
通讯作者：
Pan Baozhu
中科院分区：
文献类型：
--
作者：
Yu Guo-an;Liu Le;Li Zhiwei;Li Yanfu;Huang Heqing;Brierley, Gary;Blue, Brendon;Wang Zhaoyin;Pan Baozhu
对比分析了江河源区横向无约束、半封闭、封闭等河谷形态与河流形态的空间分布特征。长江源区根据河谷位置和河道坡度可分为Ⅰ、Ⅱ、Ⅲ 3大断面，上、下游断面以封闭（部分河段为半封闭）河谷为特征，中段以宽浅、横向无封闭河谷为特征。第一和第三部分主要是峡谷，而第二部分主要是辫状河道。根据黄河源区的河谷特征和河道坡度，将黄河源区划分为5大断面（Ⅰ ~ Ⅴ断面）。I、II和IV段为冲积河段，主要为侧向无约束（部分短河段为部分约束）河谷。第三、五段主要为封闭或半封闭。黄河源区的形态多样性明显高于长江上游。这包括辫状、分支、交错、曲流和直线冲积模式，在狭窄河段有峡谷。该地区的宏观地形（海拔、坡度、纵横向、河谷走向和限制）与青藏高原的构造运动直接相关，与气候、水文和生物因素有关，是该地区河流多样性格局的主要控制因素。
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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影响因子：
4.9
作者：
P. Lonsdale;J. Hawkins
通讯作者：
P. Lonsdale;J. Hawkins
DOI：
10.1029/00eo00337
发表时间：
2000-09
期刊：
Eos, Transactions American Geophysical Union
影响因子：
--
作者：
E. Keller
通讯作者：
E. Keller
DOI：
--
发表时间：
2006
期刊：
Geology in China
影响因子：
--
作者：
Wang Cheng-sha;Li Yong
通讯作者：
Wang Cheng-sha;Li Yong
影响因子：
3.3
作者：
Micheli, ER;Kirchner, JW
通讯作者：
Kirchner, JW
影响因子：
3.3
作者：
A. Simon;A. Collison
通讯作者：
A. Simon;A. Collison