干旱区生态环境知识资源中心(Arid): Experimental study on the effect of bottomless structure in front of a bottom outlet on a sediment flushing cone

Arid

DOI	10.1016/j.ijsrc.2020.11.002
	Experimental study on the effect of bottomless structure in front of a bottom outlet on a sediment flushing cone
	Haghjouei, Hadi; Rahimpour, Majid; Qaderi, Kourosh; Kantoush, Sameh A.
通讯作者	Rahimpour, M (corresponding author), Shahid Bahonar Univ Kerman, Dept Water Engn, Kerman, Iran.
来源期刊	INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
ISSN	1001-6279
出版年	2021
卷号	36 期号:3 页码:335-347
英文摘要	One of the main problems in reservoirs is sedimentation which reduces the operating life of dams if a proper plan and analysis method are not in place. The techniques to manage sediment in reservoirs include several sustainable management techniques that route sediment through or around the reservoir. One of the main economical methods in arid and semi-arid regions is pressurized flushing using moderate drawdown of the water level of the reservoir to evacuate sediment deposited behind dams. In the current study, the effect of a new structure called a dendritic bottomless extended (DBE) outlet structure at three angles of 30 degrees, 45 degrees, and 60 degrees on pressurized flushing efficiency was investigated. Consequently, 45 experiments were designed for three discharge rates (Q(o)), three sediment levels (H-s), four types of structure, and a no-structure condition (reference test). The results indicated that the DBE structure with a 30 degrees angle between the branches, a sedimentary dimensionless index of H-s/D-o = 4:59, and a flow dimensionless index of Q(o)/root gD(o)(5) = 1.43 (where g is the acceleration of gravity and D-o is the diameter of the bottom outlet) lead to 10-fold increase in the sediment flushing cone dimensions and sediment removal efficiency compared to the results of the reference test. Finally, according to a statistical analysis of the results, a dimensionless equation for calculating the sediment flushing cone dimensions was developed for the tested sediment characteristics. (C) 2020 International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. Published by Elsevier B.V. All rights reserved.
英文关键词	Reservoir Sediment removal efficiency Sediment flushing cone Bottom outlet Dendritic bottomless extended structure
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000606819500001
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347964
作者单位	[Haghjouei, Hadi; Rahimpour, Majid; Qaderi, Kourosh] Shahid Bahonar Univ Kerman, Dept Water Engn, Kerman, Iran; [Kantoush, Sameh A.] Kyoto Univ, Disaster Prevent Res Inst, Kyoto, Japan
推荐引用方式 GB/T 7714	Haghjouei, Hadi,Rahimpour, Majid,Qaderi, Kourosh,et al. Experimental study on the effect of bottomless structure in front of a bottom outlet on a sediment flushing cone[J],2021,36(3):335-347.
APA	Haghjouei, Hadi,Rahimpour, Majid,Qaderi, Kourosh,&Kantoush, Sameh A..(2021).Experimental study on the effect of bottomless structure in front of a bottom outlet on a sediment flushing cone.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,36(3),335-347.
MLA	Haghjouei, Hadi,et al."Experimental study on the effect of bottomless structure in front of a bottom outlet on a sediment flushing cone".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 36.3(2021):335-347.