QQ客服 官方微博 反馈留言

	COMPLEX RESPONSE OF CHANNEL FILL-SCOUR BEHAVIOR TO RESERVOIR CONSTRUCTION: AN EXAMPLE OF THE UPPER YELLOW RIVER, CHINA
	Xu J. X.
	2013
关键词	upper Yellow River reservoir construction channel scour and fill complex response adjustment downstream upstream reservoirs flow regulation dams
英文摘要	The influence of a reservoir on downstream hydrological regime and channel adjustment depends on the operational mode of the reservoir. The Liujiaxia and Longyangxia Reservoirs were completed in 1968 and 1985, respectively, both above Lanzhou. The former controls most suspended sediment supply from the drainage area above Lanzhou station, and the latter controls most runoff generated from the same area; the former has relatively small storage capacity and is used for interseasonal regulation of river flow, and the latter has much larger storage capacity and is used for multiannual regulation of river flow. Thus, the former changes sediment regime greatly, whereas the latter changes flow regime significantly. Of the runoff of the upper Yellow River, more than 95% comes from the drainage area above Lanzhou and less than 5% from below Lanzhou; of the sediment supply, 46% comes from the drainage area above Lanzhou and 56% from below Lanzhou, which cannot be regulated by the two reservoirs. Influenced by these factors, channel fill-scour behaviour after the reservoir construction exhibited a complex response, which can be separated as two stages. The response at the first stage was dominated by the Liujiaxia Reservoir and at the second by the Longyangxia Reservoir. The first stage of response can be generalized as follows: completion of the Liujiaxia Reservoirlarge quantity of sediment trappeddownstream channel scoursediment trapping attenuating due to the decrease of storage capacitychannel scour declining. The second stage of response can be generalized as follows: completion of the Longyangxia Reservoirsignificant reduction of high-flow season flowdownstream river flow incapable of carrying sediment supplied below the damdownstream channel sedimentation enhanced. The changes induced by the two reservoirs occurred successively, and a cycle of complex response occurred during the river channel adjustment. Copyright (c) 2012 John Wiley & Sons, Ltd.
出处	River Research and Applications
卷	29
期	5
页	593-607
收录类别	SCI
语种	英语
ISSN号	1535-1459
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30137]
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	Xu J. X.. COMPLEX RESPONSE OF CHANNEL FILL-SCOUR BEHAVIOR TO RESERVOIR CONSTRUCTION: AN EXAMPLE OF THE UPPER YELLOW RIVER, CHINA. 2013.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。