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Experimental study on characteristics of trapping and regulating sediment with an open-type check dam in debris flow hazard mitigation
Sun Hao1,2; You Yong1; Liu Jin-feng1
2018
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume15Issue:9Pages:2001-2012
SubtypeArticle
Contribution Rank1
AbstractBeam dams are a highly effective and commonly used open-type check dam in debris-flow hazard mitigation. In this study, dimensional analysis was used to obtain empirical equations for quantitatively determining the sediment-trapping and flow-regulating characteristics of a beam dam. To determine the coefficients of the empirical equations, flume experiments were conducted to simulate the trapping and regulating processes. The flow pattern, trapping, and regulating characteristics were investigated when debris flows passed through a beam dam. Debris-flow bulk density and peak discharge, and sediment-trapping ratios, were measured directly and indirectly. The results showed that three blocking actions occurred, and that blockage-breaking considerably influenced the trapping and regulating performance of the beam dam. The relative opening size and the sediment concentration were the two main factors affecting the performance of the beam dam. The ratio of trapping sediment decreased with relative opening, and increased with sediment concentration as well as reducing ratio of bulk density and reducing ratio of peak discharge. The sediment concentration and relative opening were the leading factors influencing the trapping and regulating sediment of a beam dam, followed by flume gradient. The results showed that the calculated values obtained using empirical equations were in good agreement with the values derived from the experiments, and that the deviation was acceptable. Finally, taking Zechawa Gully as an example, using the empirical equations we designed the opening size of a beam dam aimed to trap sediment and regulate peak discharge of debris flow in the main gully.
KeywordDebris flow Beam dam Flume experiment Trapping and regulating
DOI10.1007/s11629-017-4619-1
Indexed BySCI
Language英语
Quartile4区
TOP
WOS IDWOS:000443996500012
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23879
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 Jin-feng. Experimental study on characteristics of trapping and regulating sediment with an open-type check dam in debris flow hazard mitigation[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(9):2001-2012.
APA Sun Hao,You Yong,&Liu Jin-feng.(2018).Experimental study on characteristics of trapping and regulating sediment with an open-type check dam in debris flow hazard mitigation.JOURNAL OF MOUNTAIN SCIENCE,15(9),2001-2012.
MLA Sun Hao,et al."Experimental study on characteristics of trapping and regulating sediment with an open-type check dam in debris flow hazard mitigation".JOURNAL OF MOUNTAIN SCIENCE 15.9(2018):2001-2012.
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