IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2013  > Vol10 No.2
Risk assessment of highways affected by debris flows in Wenchuan earthquake area
Cui Peng1; Xiang Ling-zhi2; Zou Qiang1,3,4
Corresponding AuthorCUI Peng
AbstractSince the Wenchuan earthquake in China on May 12(th), 2008, highways in earthquake-affected areas have been frequently interrupted by debris flows. We analyzed the hazard effect modes and damage processes along highways and developed three key indexes, scale of debris flows, deposits on highways and river blockage, to describe quantitatively the highway disasters. By combining the empirical methods and the actual terrain conditions, we proposed new methods to determine the value of hazard indexes. In addition, we used the economic value and resistance of highway as vulnerability assessment indexes, then determined the specific subindexes for the subgrade, bridges and culverts, and developed a way for the quantified vulnerability zoning. Moreover, we proposed the assessment and mapping methods for highway risk. The risk is described into 5 grades: extremely low risk, low risk, middle risk, high risk and extremely high risk. We applied these methods in a case study carried out on provincial highway S303 from Yingxiu Town to Wolong Town, in Wenchuan County. Analysis of debris flow risk for the whole highway, showed that the total length of highway in extremely low risk area was 28.26 km, 4.83 km in low risk area, 8.0 km in middle risk area, 3.65 km in high risk area, and 3.06 km in extremely high risk area. The assessment results are consistent with the field survey data which reflected the disaster situation. This risk method can be used objectively to evaluate the debris-flow risk along highways, and is useful for highway reconstruction in mountainous areas suffering from active debris flows.
KeywordDebris Flow Highway Disaster Hazard Analysis Vulnerability Analysis Risk Analysis Wenchuan Earthquake
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000317352800001
Funding OrganizationNational Natural Science Foundation of China (NSFC)(41030742) ; National Basic Research Program of China (973 Program)(2011CB409902)
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2013_Vol10 No.2
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China
2.Chongqing Jiaotong Univ, Chongqing, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
4.Southwest Univ Sci & Technol, Coll Environm & Resource, Chongqing, Peoples R China
First 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
Cui Peng,Xiang Ling-zhi,Zou Qiang. Risk assessment of highways affected by debris flows in Wenchuan earthquake area[J]. JOURNAL OF MOUNTAIN SCIENCE,2013,10(2):173-189.
APA Cui Peng,Xiang Ling-zhi,&Zou Qiang.(2013).Risk assessment of highways affected by debris flows in Wenchuan earthquake area.JOURNAL OF MOUNTAIN SCIENCE,10(2),173-189.
MLA Cui Peng,et al."Risk assessment of highways affected by debris flows in Wenchuan earthquake area".JOURNAL OF MOUNTAIN SCIENCE 10.2(2013):173-189.
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