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Experimental study on blocking and self-cleaning behaviors of beam dam in debris flow hazard mitigation
Sun, Hao1,2; You, Yong1; Liu, Jinfeng1
Corresponding AuthorYou, Yong(yyong@imde.ac.cn)
2018
Source PublicationINTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
ISSN1001-6279
Volume33Issue:4Pages:395-405
SubtypeArticle
AbstractBlocking is one of the important features when a beam dam intercepts debris flow, while self-cleaning is another when managing suspended debris flow. Both features determine the debris flow control benefits of beam dam but the latter often is not considered in practical engineering design. In this paper, a series of specially designed flume experiments were done to simulate blocking and self-cleaning processes. The blocking ratio and deposition features were measured to contrast the blocking and self-cleaning performance before and after artificial self-cleaning. The experimental results reveal that the beam dam net opening, particle diameter of sediment, sediment concentration, and gradient of the channel are the main factors affecting blocking performance. A new criterion of blocking performance of beam dams that considers the interaction of multiple factors and can provide guidance to practical project design is proposed. For all three types of blocking, sediment deposited upstream of a beam dam can be effectively transported downstream by erosion from post-debris-flow floods, Self-cleaning performance is most efficient for temporary blocking, followed by partial-blocking, and total-blocking. The efficiency of self-cleaning largely depends on the change of the sediment deposit due to erosion. Finally, a discussion is given for the optimal design of an open-type check dam and the feasibility of synergistic effects of self-cleaning in combination with artificial cleaning. Some supporting artificial silt-cleaning should be implemented in practice. A beam dam will, thus, have more storage capacity with which to control the next debris flow event. (C) 2018 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.
KeywordDebris flow Beam dam Critical blocking criterion Self-cleaning Flume experiment
DOI10.1016/j.ijsrc.2018.04.004
Indexed BySCI
Language英语
Quartile4区
Funding ProjectNational Natural Science Foundation of China[41772343] ; West Light Foundation (Class A) of the CAS ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS[SDS-135-1701]
TOP
WOS Research AreaEnvironmental Sciences & Ecology ; Water Resources
WOS SubjectEnvironmental Sciences ; Water Resources
WOS IDWOS:000448207900003
Funding OrganizationNational Natural Science Foundation of China ; West Light Foundation (Class A) of the CAS ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS
PublisherIRTCES
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24359
Collection山地灾害与地表过程重点实验室
Corresponding AuthorYou, Yong
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Sun, Hao,You, Yong,Liu, Jinfeng. Experimental study on blocking and self-cleaning behaviors of beam dam in debris flow hazard mitigation[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2018,33(4):395-405.
APA Sun, Hao,You, Yong,&Liu, Jinfeng.(2018).Experimental study on blocking and self-cleaning behaviors of beam dam in debris flow hazard mitigation.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,33(4),395-405.
MLA Sun, Hao,et al."Experimental study on blocking and self-cleaning behaviors of beam dam in debris flow hazard mitigation".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 33.4(2018):395-405.
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