Analysis and assessment of landslide hazards in Wangcang County
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Abstract:
The landslide is the one of main geological disasters in Wangcang County of Sichuan Province. The occurrence of land2 slide in this county is primarily controlled by the factors such as lithology, topography. and precipitation. Based on 90 historical landslides in Wangcang County, a grey assessment system was developed using entropy thesis to analyze the distribution law of landslides and determine the zonation of landslide risk in Wangcang County. The results showed that the high occurrence of landslide is mainly located in the areas where the landscape type is medium mountain of tectonic erosion, the slope range is from 15 b to 60b, the precipitation is rich, or the stratum is the loose deposit. Additionally, 39 unstable slopes were used to verify the assessment accuracy, which suggested that the grey system based on the entropy thesis can provide reliable landslide risk as2 sessment.
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