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	Scale effect on sediment yield from sloping surfaces to basins in hilly loess region on the Loess Plateau in China
	Fang H. Y. ; Chen H. ; Cai Q. G. ; Li Q. Y.
	2007
关键词	hilly loess region Loess Plateau mean annual specific sediment yield drainage area flow shear force drainage density soil-erosion gully erosion yellow-river catchment flux
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 km(2) on the Loess Plateau, the relationship between mean annual specific sediment yield (Y-s) 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 km(2) in area corresponding to the whole slope surface, and the second peak value appears at 96.1 km(2) stop in area. The non-linear variation in the Y-s-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 Omega.
出处	Environmental Geology
卷	52
期	4
页	753-760
收录类别	SCI
语种	英语
ISSN号	0943-0105
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24052]
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	Fang H. Y.,Chen H.,Cai Q. G.,et al. Scale effect on sediment yield from sloping surfaces to basins in hilly loess region on the Loess Plateau in China. 2007.

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