Debris flows in Meigu county of Sichuan (SW China): Geomorphology and hazards
语种英语
Liu, Xilin1; Zhang, Dan2
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705-713
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2
摘要A torrential rainstorm on June 1, 2005 in Meigu county of Sichuan province, SW China, resulted in the generation of debris flows from two drainage basins. Map (1:50000 scale) of topography and depositing materials, coupled with the data from meteorological station and field investigation, are used to evaluate the geomorphology and hazard characteristics of debris flows. The return period of debris flows is 20 years and its magnitude is small-moderate scale. Rainstorm and hail with short duration and high intensity in the upper reaches of drainage basins are the triggering factor for debris flows. Unstable side slope in low-middle reaches and a large number of scattered materials in channels provide source materials for debris flows. Grain-size curves of debris flows are multiple peaks. The high clay content, boulder piling up boulder, mud crack show that the debris flows are viscous. Debris flows occurred abruptly, 9 local residents were killed or missed, 8 were injured and great property was lost © 2011 Casa Editrice Universita La Sapienza.
关键词Channel evolution Coefficient of velocity Debris flows Discharge ratio Junction angles Linear relationships Model tests Wenchuan Earthquake
DOI10.4408/IJEGE.2011-03.B-027
ISBN号9788895814469
收录类别EI
EI收藏号Accession number:20122315082219
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文献类型会议论文
条目标识符http://ir.imde.ac.cn/handle/131551/24062
专题山地表生过程与生态调控重点实验室
通讯作者Liu, Xilin
作者单位1.School of Geography and Planning, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China;
2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
第一作者单位School of Geography and Planning, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China
通讯作者单位School of Geography and Planning, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China
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Liu, Xilin,Zhang, Dan. Debris flows in Meigu county of Sichuan (SW China): Geomorphology and hazards[C]//R. Genevos, D.L. Hamlion, A. Prestinuizi:American Society of Civil Engineers (ASCE),2011:705-713.
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