摘要
对辽河流域河流水系进行分段,计算河段的蜿蜒度,分析各子流域东辽河、西辽河、浑太河、辽河干流及其支流的河段蜿蜒特征,对4个子流域之间的河段蜿蜒度进行了差异显著性分析;并研究了河段蜿蜒度与地貌、河流等级、坡降的关系,结果表明:(1)辽河流域共有3158个河段,河段蜿蜒度范围为1—4.2;(2)各子流域低度蜿蜒河段占流域总河段数的70%左右,辽河干流属于高度蜿蜒河段,大多数源头河流、西辽河中下游以及辽河干流东部的招苏台河、清河、柴河的上游属于低度蜿蜒河段,东辽河和浑太河河流从源头山地区流向平原地区后河流逐渐蜿蜒;(3)东辽河、西辽河和浑太河3个子流域之间河段蜿蜒度差异不显著,辽河干流及支流河段蜿蜒度显著高于其他3个子流域;(4)不同地貌类型间河段蜿蜒度差异极显著,河段蜿蜒度与河流等级成正相关关系,河段蜿蜒度与坡降成负相关关系。
Reach sinuosity was calculated based on the segmented reaches in Liaohe River system, and characteristics of reach sinuosity in the whole basin and sub-basins of East Liaohe River, West Liaohe River, Huntai River and main Liaohe River were studied. Reach sinuosity among sub-basins was compared by the significance analysis of difference, and the relationship between reach sinuosity and fluvial landforms, stream order and river slope. The results indicate that Liaohe River has 3158 reaches, and the reach sinuosity ranges from 1 to 4.2. Low sinuosity accounts for 70% of total reaches, and main Liaohe River belongs to high-sinuosity reach, and most of the head reaches belong to low sinuosity reach. The East Liaohe River, Huntai River get sinuous gradually from head streams to plain rivers. The middle and lower sections of West Liaohe River and the east of main Liaohe River belong to low-sinuosity reach. There are no significant differences among the East Liaohe River, West Liaohe River and Huntai River, but obvious differences to the main Liaohe River. There are significant differences of the reach sinuosity among fluvial landforms. And reach sinuosity is positively correlated to stream order, but negatively corrected to river slope.
出处
《生态科学》
CSCD
北大核心
2014年第3期495-501,共7页
Ecological Science
基金
国家水体污染控制与治理科技重大专项课题"流域水生态保护目标制定技术研究"(2012ZX07501-001-02)
关键词
辽河
蜿蜒度
河流地貌
河流等级
坡降
Liaohe River
sinuosity
fluvial landforms
stream order
river slope
