Abstract
Without taking inducing factors into consideration, this paper adopts a quantitative analysis of the bottom factors in the Three Gorges Reservoir area, studies the relationship between the bottom factors and the development of landslides, and then zones the area according to risk levels. The bottom factors adopted in this paper include lithological characters(U 1), gradient(U 2), slope form (U 3), difference of height(U 4), and slope orientation(U 5). In 4 650 km2 of the studied area, the areas of the very high., high, medium and low hazard degree area respectively were 57. 94 km2, 2 305. 15 km2, 1 241. 6 km2, 1 045. 31 km2. The methodological steps are ① inversion statistic analysis, ② the analysis of contribution ratio and weighing, ③ getting results via fuzzy evaluation of risk levels.
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Foundation item: Supported by the Key International Science and Technology Cooperation Projects of China (2004DFB01100)
Biography: QIAO Jianping (1953-), male, Professor, research direction: landslide hazard assessment, landslide mechanism and distribution rule.
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Jianping, Q., Axing, Z., Caiyan, W. et al. Bottom factors applied to the zoning study of the risk levels of landslides in the Three Gorges Reservoir area. Wuhan Univ. J. Nat. Sci. 11, 761–766 (2006). https://doi.org/10.1007/BF02830161
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DOI: https://doi.org/10.1007/BF02830161