IMHE OpenIR  > 山地灾害与地表过程重点实验室
Characteristics and mechanism of debris-flow surges at Jiangjia Ravine
Language英语
Hu, Kaiheng1,2; Hu, Chaolang3; Li, Yong1,2; Peng, Cui1,2
2011
Source Publication5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
Author of SourceR. Genevos ; D.L. Hamlion ; A. Prestinuizi
Pages211-217
meeting5th International Conference on Debris-Flow Hazard Mitigation: Mechanics, Prediction, and Assessment
Conference Date2011
Conference PlacePadua
CountryItaly
PublisherAmerican Society of Civil Engineers (ASCE)
Contribution Rank1
AbstractDebris Flows in nature, for example at Jiangjia Ravine, were often observed moving in the form of intermittent surges which is considered as a kind of wave that is termed as roll wave in this paper. Spatial and temporal characteristics of the roll waves at Jiangjia, as well as their separation and superposition were described in details. First-arrived waves were observed to smooth rough bed at the gentle middle reach and produce a residual layer on which a sequent wave can move with steady profile and high velocity. The data measured by the Dongchuan Debris Flow Observation and Research Station shows the waves are not periodic and a kind of supercritical flow which only propagates downstream. Furthermore, it is observed that there are two kinds of wave profile, linear and non-linear, for the same debris-flow surge in Lagrange and Euler reference frames. A power relationship between the depthaveraged velocity and flow-depth of the surges is inferred from the different profile functions in the two frames. Finally, it was proposed that mass exchange between the residual layer and moving wave reduces frictional resistance and keeps the wave high-speed. © 2011 Casa Editrice Universita La Sapienza.
KeywordDisaster management Engineering aspects Landslide dam Mitigation strategy Occurrence probability Response Secondary disasters Typhoon Morakot
DOI10.4408/IJEGE.2011-03.B-071
ISBN9788895814469
Indexed ByEI
Accession numberAccession number:20122315082168
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24069
Collection山地灾害与地表过程重点实验室
Corresponding AuthorHu, Kaiheng
Affiliation1.Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, 610041, China;
2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China;
3.Department of Mathematics, Sichuan University, Chengdu, 610064, 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
Hu, Kaiheng,Hu, Chaolang,Li, Yong,et al. Characteristics and mechanism of debris-flow surges at Jiangjia Ravine[C]//R. Genevos, D.L. Hamlion, A. Prestinuizi:American Society of Civil Engineers (ASCE),2011:211-217.
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