IMHE OpenIR  > 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
Corresponding AuthorCUI Ming
2015-09
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume12Issue:5Pages:1241-1253
Subtype期刊论文
AbstractThere 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.
KeywordSediment Delivery Ratio Spatial Scale Soil Erosion Sediment Yield Loess Plateau
DOI10.1007/s11629-014-3187-x
Indexed BySCI
Language英语
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10892
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.5
Recommended Citation
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.
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