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The characteristics of genesis and evolution of debris flow fans based on fixed point observation
语种英语
Zhang, Jinshan1,2; Shen, Xingju3,4
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283-292
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The Liziao Gully and Huajiaopo Gully are 2 tributaries of Jiangjia Gully in its middle reaches, a well-known gully for its debris flows of high frequency. The two gullies are extremely similar in features of their drainage basins, including high frequency of debris flows and rapid formulation of debris flow fans. During field studies, process of movement and accumulation of debris flow fan are observed, and sampling and analysis of debris flows with different features are conducted. Terrain of debris flow fans and their longitudinal and transverse profiles are measured prior to and post rainy season each year. By analyzing evolution process, planar features, longitudinal and transverse section, accumulation rate and other parameters of debris fans in the 2 tributary gullies during 2006-2008, following conclusions are obtained: (1) Influenced by geological and lithological features in its drainage basin, Huajiaopo Gully is larger in unit weight and grain size of its debris flow, and its accumulation fan is formulated in Mound-shape. Whereas debris flow in Liziao Gully is smaller in unit weight and grain size, with debris flows moving on the fan and its accumulation is in a linguiform. Further evolution of debris flow fans is finished with Mound-shaped accumulation and channel shifting. (2) In case of accumulation in main channel, debris flow fans in tributary gullies are formed by aggradation and aggradation height is uniformly distributed at upper and lower parts of the fan. (3) Slopes of debris flow fans on both longitudinal and transverse sections are largely determined by fluidic properties of debris flows. The greater the unit weight is, the larger the slope of debris flows on both longitudinal and transverse sections is. © 2011 Casa Editrice Universita La Sapienza.
关键词Debris flows Discharge estimation Flow depth Jiangjia Gully Reliable methods Surge
DOI10.4408/IJEGE.2011-03.B-102
ISBN号9788895814469
收录类别EI
EI收藏号Accession number:20122315082176
引用统计
文献类型会议论文
条目标识符http://ir.imde.ac.cn/handle/131551/24064
专题山地灾害与地表过程重点实验室
通讯作者Zhang, Jinshan
作者单位1.Key Laboratory of Mountain Hazard and Surface Processes, Chinese Academy of Sciences, Sichuan Chengdu 610041, China;
2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Ministry of Water Conservancy, Sichuan Chengdu 610041, China;
3.Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;
4.College of Tourism and History and Culture, Southwest University for Nationalities, Sichuan Chengdu 610041, 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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Zhang, Jinshan,Shen, Xingju. The characteristics of genesis and evolution of debris flow fans based on fixed point observation[C]//R. Genevos, D.L. Hamlion, A. Prestinuizi:American Society of Civil Engineers (ASCE),2011:283-292.
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