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Characteristics and mechanism of debris-flow surges at Jiangjia Ravine
语种英语
Hu, Kaiheng1,2; Hu, Chaolang3; Li, Yong1,2; Peng, Cui1,2
2011
会议录名5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
会议录编者/会议主办者R. Genevos ; D.L. Hamlion ; A. Prestinuizi
页码211-217
会议名称5th International Conference on Debris-Flow Hazard Mitigation: Mechanics, Prediction, and Assessment
会议日期2011
会议地点Padua
会议举办国Italy
出版者American Society of Civil Engineers (ASCE)
产权排序1
摘要Debris 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.
关键词Disaster management Engineering aspects Landslide dam Mitigation strategy Occurrence probability Response Secondary disasters Typhoon Morakot
DOI10.4408/IJEGE.2011-03.B-071
ISBN号9788895814469
收录类别EI
EI收藏号Accession number:20122315082168
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文献类型会议论文
条目标识符http://ir.imde.ac.cn/handle/131551/24069
专题山地灾害与地表过程重点实验室
通讯作者Hu, Kaiheng
作者单位1.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
第一作者单位中国科学院水利部成都山地灾害与环境研究所
通讯作者单位中国科学院水利部成都山地灾害与环境研究所
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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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