IMHE OpenIR  > 山地灾害与地表过程重点实验室
Disaster characteristics and optimal design of drainage canal of debris flow following Wenchuan earthquake in Weigou Gully in Beichuan County, Sichuan Province, China
Language英语
You, Yong; Liu, Jinfeng; Chen, Xingzhang
2011
Source Publication5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
Author of SourceR. Genevos ; D.L. Hamlion ; A. Prestinuizi
Pages805-811
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
AbstractThe Weigou Gully, a branch of Pingtong River, is located in Guixi Township, Beichuan County. The area was seriously affected by the Wenchuan earthquake and its aftermath. Debris flows occurred on September 24, 2008, July 14, 2009, and September 10, 2009, threatening the safety of the inhabitants and their property. Debris flows in Weigou Gully were mainly supplied by landslides triggered by the earthquake. The debris flows had characteristics of high frequency, high bulk density and coarse particle size. Following the earthquake, the frequency of debris flows increased. Based on the analysis of the disaster characteristics, the optimal cross-section design method for the "trapezoid-v" shaped debris flow drainage canal of the Weigou Gully is discussed. The depths (h1and h2) of the cross-section of the "trapezoid-v" shaped drainage canal and the optimal cross-section parameters using these two measurements are defined. In addition, several formulas for calculating the cross-section measurements are deduced under optimal hydraulic conditions when discharge (Q), debris grain composition (D50and D10) and longitudinal ratio (I) are known. Finally, the optimal dimensions for the cross-section of the Weigou Gully debris flow canal are determined. © 2011 Casa Editrice Universita La Sapienza.
KeywordDebris flows Field investigation Hazard characteristics Hazard process Meigu county Meteorological station Sichuan province Triggering factors
DOI10.4408/IJEGE.2011-03.B-077
ISBN9788895814469
Indexed ByEI
Accession numberAccession number:20122315082229
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24061
Collection山地灾害与地表过程重点实验室
Corresponding AuthorYou, Yong
AffiliationYou, Yong(1.2);Liu, Jinfeng(1,2);Chen, Xingzhang
Recommended Citation
GB/T 7714
You, Yong,Liu, Jinfeng,Chen, Xingzhang. Disaster characteristics and optimal design of drainage canal of debris flow following Wenchuan earthquake in Weigou Gully in Beichuan County, Sichuan Province, China[C]//R. Genevos, D.L. Hamlion, A. Prestinuizi:American Society of Civil Engineers (ASCE),2011:805-811.
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