IMHE OpenIR  > 山地灾害与地表过程重点实验室
Influence of debris flow on channel evolution
Language英语
Liu, Jiankang1,2,3; Cheng, Zunlan1,2; Zhang, Xiaogang1,2; Cheng, Si4
2011
Source Publication5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
Author of SourceR. Genevos ; D.L. Hamlion ; A. Prestinuizi
Pages231-236
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
AbstractAffected 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.
KeywordAccumulation rates Debris flow fan Fixed point observations Genesis and evolution Jiangjia Gully Lithological features Transverse profile Transverse section
DOI10.4408/IJEGE.2011-03.B-033
ISBN9788895814469
Indexed ByEI
Accession numberAccession number:20122315082170
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24063
Collection山地灾害与地表过程重点实验室
Corresponding AuthorLiu, Jiankang
Affiliation1.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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