IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.4
Debris Flow Susceptibility Assessment Using a Probabilistic Approach: A Case Study in the Longchi Area; Sichuan Province; China
CHANG Ming; TANG Chuan; ZHANG Dan-dan; MA Guo-chao
Corresponding AuthorTANG Chuan
2014-07
Source PublicationJournal of Mountain Science
Volume11Issue:4Pages:1001-1014
AbstractThe Longchi area with the city of Dujiangyan; in the Sichuan province of China; is composed of Permian stone and diorites and Triassic sandstones and mudstones intercalated with slates. An abundance of loose co-seismic materials were present on the slopes after the May 12; 2008 Wenchuan earthquake; which in later years served as source material for rainfall-induced debris flows or shallow landslides. A total of 48 debris flows; all triggered by heavy rainfall on 13th August 2010; are described in this paper. Field investigation; supported by remote sensing image interpretation; was conducted to interpret the co-seismic landslides in the debris flow gullies. Specific characteristics of the study area such as slope; aspect; elevation; channel gradient; lithology; and gully density were selected for the evaluation of debris flow susceptibility. A score was given to all the debris flow gullies based on the probability of debris flow occurrence for the selected factors. In order to get the contribution of the different factors; principal component analyses were applied. A comprehensive score was obtained for the 48 debris flow gullies which enabled us to make a susceptibility map for debris flows with three classes. Twenty-two gullies have a high susceptibility; twenty gullies show a moderate susceptibility and six gullies have a low susceptibility for debris flows.
KeywordDebris Flow Landslide Probability Susceptibility Assessment Grey Correlation
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7003
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.4
Corresponding AuthorTANG Chuan
Recommended Citation
GB/T 7714
CHANG Ming,TANG Chuan,ZHANG Dan-dan,et al. Debris Flow Susceptibility Assessment Using a Probabilistic Approach: A Case Study in the Longchi Area; Sichuan Province; China[J]. Journal of Mountain Science,2014,11(4):1001-1014.
APA CHANG Ming,TANG Chuan,ZHANG Dan-dan,&MA Guo-chao.(2014).Debris Flow Susceptibility Assessment Using a Probabilistic Approach: A Case Study in the Longchi Area; Sichuan Province; China.Journal of Mountain Science,11(4),1001-1014.
MLA CHANG Ming,et al."Debris Flow Susceptibility Assessment Using a Probabilistic Approach: A Case Study in the Longchi Area; Sichuan Province; China".Journal of Mountain Science 11.4(2014):1001-1014.
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