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本文通过全面分析历史因素(点密度、面密度和体密度)、基本环境因素(工程地质岩组、地形坡度、地质构造、斜坡结构、高程和河流水系)以及诱发因素(降雨、地震烈度和人类活动)对地质灾害易发程度的影响,并最终建立了大比例尺(1:50000～1:5000)地滑坡灾害易发性评价指标体系。通过采用信息量模型方法,以ARCGIS为平台,针对工程区的滑坡易发程度进行了研究分析,并最终得到了该区滑坡灾害易发程度信息,包括其滑坡灾害易发分区图及相关统计信息,结果表明:研究区中滑坡灾害高易发性区面积为0.582km~2,中等易发性区面积12.16km~2,低易发性区面积120.69km~2,极低易发性区面积78.47km~2,分别占总面积0.27%、5.74%、57%、37%,评价结果与当地实际情况有较好的一致性。
In this paper, a comprehensive analysis of historical factors (point density, areal density and bulk density), basic environmental factors (engineering geology, topography, geological structure, slope structure, elevation and river system) and predisposing factors Activities) on the vulnerability of geological disasters, and finally established a large scale (1: 50000 ~ 1: 5000) landslide hazard susceptibility evaluation index system. By using the information model method and ARCGIS as a platform, the degree of landslide susceptibility in the project area is studied and analyzed, and finally the information of the degree of vulnerability of the landslide hazard in the area is obtained, including the landslide hazard prone area map and related statistics The results show that the area of high-prone landslide hazard in the study area is 0.582km ~ 2, the area of moderately prone area is 12.16km ~ 2, the area of low susceptibility is 120.69km ~ 2, and the area of very low susceptibility is 78.47km ~ 2, accounting for 0.27%, 5.74%, 57% and 37% of the total area respectively. The evaluation results are in good agreement with the actual situation in the area.