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	Causes for continuous siltation of the lower Yellow River
	Shi C. X.
	2005
关键词	River aggradation upriver and downriver controls graded profile base level deltaic extension Yellow River mouth channel china adjustment sediment delta
英文摘要	Previous studies indicate that aggradation of a river channel is caused by upriver and/or downriver controls, but the evaluation of their relative importance is often difficult. A method is proposed to isolate the effect of the downriver control based on the slopes of the existing river profile, those of the graded profile estimated from the discharge-sediment relationship and slope reduction due to local base-level rise. The method was applied to the rapidly aggrading lower Yellow River. The downriver control in this case refers to the local base-level rise associated with deltaic extension during the period under discussion. The result shows that the main portion of siltation along the river is not caused by downriver control but by the slope difference between the existing and the graded profiles over a period within the last 700 years, assuming conditions of discharge and sediment load during the period from 1962 to 1985 are reflective of the long term. The marked slope difference between the existing and the graded profiles of the river is a result of changes in the river environment in the past several thousand years including the increase of sediment load, local base-level rise associated with river lengthening by deltaic growth, and relative sea-level rise due to tectonic subsidence of the coastal alluvial plain. (c) 2004 Elsevier B.V. All rights reserved.
出处	Geomorphology
卷	68
期	3-4
页	213-223
收录类别	SCI
语种	英语
ISSN号	0169-555X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23096]
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	Shi C. X.. Causes for continuous siltation of the lower Yellow River. 2005.

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