| 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 Publication | 5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment |
| Author of Source | R. Genevos ; D.L. Hamlion ; A. Prestinuizi |
| Pages | 211-217 |
| meeting | 5th International Conference on Debris-Flow Hazard Mitigation: Mechanics, Prediction, and Assessment |
| Conference Date | 2011 |
| Conference Place | Padua |
| Country | Italy |
| Publisher | American Society of Civil Engineers (ASCE) |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | Disaster management Engineering aspects Landslide dam Mitigation strategy Occurrence probability Response Secondary disasters Typhoon Morakot |
| DOI | 10.4408/IJEGE.2011-03.B-071 |
| ISBN | 9788895814469 |
| Indexed By | EI |
| Accession number | Accession number:20122315082168 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/24069 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Hu, Kaiheng |
| Affiliation | 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 |
| 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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| Characteristics and （477KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Application Full Text | ||
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