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黄河源玛曲河段河型沿程变化及其原因
李志威; 王兆印; 余国安; 杜俊
Source Publication泥沙研究
ISSN0468-155X
2013
Issue3Pages:51-58
Keyword黄河源 河型多样性 沿程变化 网状河流 分汊河流 弯曲河流 辫状河流
Abstract黄河源玛曲河段是一段特殊的冲积平原河道,接连出现了网状河型、分汊河型、弯曲河型和辫状河型,在270km的流程里,冲积河型发生了4次河型沿程变化。通过遥感图像和野外调查相结合,描述玛曲河段河型多样性和河道的基本特征,分析河型沿程变化的原因。玛曲河段的冲积河道主要发生4次河型变化,即网状型-分汊型、网状型-弯曲型、弯曲型-辫状型和辫状型-弯曲型。网状型-分汊型变化的原因是地形限制,泥沙淤积形成沙洲和植被发育。网状型-弯曲型变化的原因是地形限制、河床比降由大变小、河岸物质组成沿程变细。弯曲型-辫状型变化的原因是白河入汇、河床比降变大。辫状型-弯曲型变化的主原因是下游峡谷段河床下切和黑河入汇。
Language中文
Indexed ByCSCD
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Document Type中文期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/28234
Collection历年回溯文献
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李志威,王兆印,余国安,等. 黄河源玛曲河段河型沿程变化及其原因. 2013.
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