In this paper we mapped co-seismic landslides and potential source materials for generating debris flows in 145 catchments based on high resolution satellite images in Wenchuan County. Slope, aspect, lithology, peak ground acceleration, distance to drainage, distance to faults were used as factors for debris flow susceptibility analysis. Probabilistic mathematic method, spatial analysis, analytic hierarchy process, and weight analysis were applied to generate a debris flow susceptibility map. Our result indicates that 60, 43, and 42 catchments were highly, moderately, and lowly susceptible to debris flow respectively. The results offer reference for the debris flow research and mitigation planning of the area in the future.
Key words
debris flow /
analytic hierarchy process (AHP) /
probabilistic approach /
susceptibility /
Wenchuan county /
GIS
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References
WANG W N,NAKAMURA H,TSUCHIYA S,et al.Distributions of Landslides Triggered by the Chi-Chi Earthquake in Central Taiwan on September 21,1999[J].Journal of the Japan Landslide Society,2002,38( 4): 318-326.
李树德,任秀生,岳升阳,等.地震与泥石流活动.水土保持研究,2001,8(2):26-28.
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.
LI Wei-le,HUANG Run-qiu,TANG Chuan,et al.Co-seismic Landslide Inventory and Susceptibility Mapping in the 2008 Wenchuan Earthquake Disaster Area,China[J]. Journal of Mountain Science,2013,10(3):339-354.
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