Sediment Delivery across Multiple Spatio-temporal Scales in an Agriculture Watershed of the Chinese Loess Plateau

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2015 > Vol12 No.5

	Sediment Delivery across Multiple Spatio-temporal Scales in an Agriculture Watershed of the Chinese Loess Plateau
	ZHENG Ming-guo; LI Run-kui; HE Ji-jun; CUI Ming
刊名	Journal of Mountain Science
	2015-09
卷号	12 期号:5 页码:1241-1253
关键词	Sediment delivery ratio Spatial scale Soil erosion Sediment yield Loess Plateau
ISSN号	1672-6316
通讯作者	CUI Ming
英文摘要	There is a consensus that sediment delivery ratio in the Chinese Loess Plateau is close to 1 at the inter-annual timescale. However, little information is available about the sediment delivery at finer timescales. We evaluated the sediment delivery from plots to watersheds at the event or intra-annual, annual, and inter-annual timescales within the Wudinghe river basin, a 30,261 km2 basin in the Loess Plateau. We calculated the ratio of sediment output to sediment input and presented the temporal change of the channel morphology to determine whether sediment deposition occurs. Although a single flood event frequently has a sediment yield exceeding 10,000 t km-2, sediment deposition rarely occurs except during some small runoff events (sediment yield< 5000 t km-2) or dry years (sediment yield< 10,000 t km-2) when moving from slopes up to the main channels of the Wudinghe River. This observation suggests a sediment delivery ratio close to 1 even at the event or intra-annual and the annual timescales, but not necessarily at the inter-annual timescale. Such a high sediment delivery ratio can be related to hyper-concentrated flows, which have very strong sediment transport capacity even at low flow strength. Because hyper-concentrated flows are well-developed in the whole Loess Plateau, a sediment delivery ratio close to 1 below the inter-annual timescale possibly remains true for other rivers in the Loess Plateau.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/10892]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2015_Vol12 No.5
推荐引用方式 GB/T 7714	ZHENG Ming-guo,LI Run-kui,HE Ji-jun,et al. Sediment Delivery across Multiple Spatio-temporal Scales in an Agriculture Watershed of the Chinese Loess Plateau[J]. Journal of Mountain Science,2015,12(5):1241-1253.
APA	ZHENG Ming-guo,LI Run-kui,HE Ji-jun,&CUI Ming.(2015).Sediment Delivery across Multiple Spatio-temporal Scales in an Agriculture Watershed of the Chinese Loess Plateau.Journal of Mountain Science,12(5),1241-1253.
MLA	ZHENG Ming-guo,et al."Sediment Delivery across Multiple Spatio-temporal Scales in an Agriculture Watershed of the Chinese Loess Plateau".Journal of Mountain Science 12.5(2015):1241-1253.