Scale effect on sediment yield from sloping surfaces to basins in hilly loess region on the Loess Plateau in China

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	Scale effect on sediment yield from sloping surfaces to basins in hilly loess region on the Loess Plateau in China
	Cai Qiangguo; Fang Haiyan
	2007
关键词	Catchments Drainage Plastic flow Runoff Shear stress Slope protection
英文摘要	Based on data from two runoff plots and ten stations in hilly loess region Dalihe drainage basin ranging in area from 0.0006 to 3983 km² on the Loess Plateau, the relationship between mean annual specific sediment yield (Ys) and drainage area (A) is studied, which is different from those for many other drainage areas of the world, neither at the scale of whole basin nor at local scale on the Loess Plateau. With increasing drainage area, the mean annual specific sediment yield experiences two peak values: the first peak value appears at 0.00408 km² in area corresponding to the whole slope surface, and the second peak value appears at 96.1 km² in area. The non-linear variation in the Ys-A can be explained as follows: the first peak value can be explained by the abrupt increase in slope gradient and flow shear stress resulting in highly increased sediment concentration and specific sediment yield. And the second peak value can be explained by the combined influence of flow shear stress and drainage density, represented by dimensionless variable Ω. © 2006 Springer-Verlag.
出处	Environmental Geology
卷	52 期:4 页:753-760
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24944]
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	Cai Qiangguo,Fang Haiyan. Scale effect on sediment yield from sloping surfaces to basins in hilly loess region on the Loess Plateau in China. 2007.