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《Science of Surveying and Mapping》 2011-03
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A hazard evaluation and risky assessment of Wenjiaba landslide based on RS

ZHANG Xue-feng①②,HE Zheng-wei①②③,XUE Dong-jian①②,ZHANG Dong-hui①②,LIU Yan-song①②(①State Key Laboratory of Geohazard Prevention & Geoenvironment Protection,Chengdu 610059,China;②Geosciences College,Chengdu University of Technology,Chengdu 610059,China;③Key Laboratory of Resource Environment and GIS in Beijing,Capital Normal University,Beijing 100037,China)  
This paper took the Wenjiaba landslide of Pingwu County as the research object,3 factors of the landslide formative conditions were analyzed: geological,geomorphic and hydrological conditions.Based on the theories of remote-sense geology and with the support of geological information,topographical maps,GPS data,and conducted a field survey,the interpretation keys were established.By interpreting the SPOT 5 images,the landslide boundary and landslide factors information were extracted,the volume was estimated and its development feature was analyzed.According to the interpretation result,5 features were chosen as the assessment factors: slope gradient,lithological character,seismic effect,hydrological conditions and rainfall amount of the landslide,making a risk evaluation by using AHP(analytic hierarchy process) method.Finally,taking the potential dangerous factors as the subject,a risk assessment was made,while risk management was mainly based on project control method.
【Fund】: 国家863重点项目(2007AA120306)
【CateGory Index】: P237;P642.22
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