| Influence of debris flow on channel evolution | |
| Language | 英语 |
Liu, Jiankang1,2,3; Cheng, Zunlan1,2 ; Zhang, Xiaogang1,2; Cheng, Si4
| |
| 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 | 231-236 |
| 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 | Affected by the active plate motion, the upper Minjiang River develops more than 21 debris flow valleys. After the Wenchuan earthquake on May 12, 2008, the geohazards occur more frequently and seriously because of the increased debris source, and 9 debris flows blocked the mainstream. Based on the characteristics of debris-flow dams, model tests have been accomplished. Given the junction angle of 90°, influence of debris flow on channel evolution is discussed for different flow density, and discharge ratio and momentum ratio between debris flow and the mainstream water flow. The results show that there is a linear relationship between momentum ratio RM(ratio between momentum for flow in tributary and mainstream) and shrink ratio 5 (index defined to describe the magnitude of channel shrink after inflow of debris) of mainstream, and also an exponential relationship between the ultimate average width Bm(index defined to describe the average width of river channel after dam failure) of mainstream and the coefficient of velocity variation Fv(ratio between velocity for flow in mainstream after dam failure and before its formation). © 2011 Casa Editrice Universita La Sapienza. |
| Keyword | Accumulation rates Debris flow fan Fixed point observations Genesis and evolution Jiangjia Gully Lithological features Transverse profile Transverse section |
| DOI | 10.4408/IJEGE.2011-03.B-033 |
| ISBN | 9788895814469 |
| Indexed By | EI |
| Accession number | Accession number:20122315082170 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/24063 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Liu, Jiankang |
| Affiliation | 1.Key Lab. of Mountain Hazards and Surface Processes, Chinese Academy of Sciences, Chengdu 610041, China; 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 3.Graduated University of Chinese Academy of Science, Beijing 100049, China; 4.China University of Geosciences(Beijing), Beijing 100083, 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 | Liu, Jiankang,Cheng, Zunlan,Zhang, Xiaogang,et al. Influence of debris flow on channel evolution[C]//R. Genevos, D.L. Hamlion, A. Prestinuizi:American Society of Civil Engineers (ASCE),2011:231-236. |
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| File Name/Size | DocType | Version | Access | License | ||
| Influence of debris （377KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Application Full Text | ||
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