摘要
为提高贵州省三都县地质灾害的防灾减灾能力,通过资料收集、地质灾害调查、数理统计、GIS空间分析等手段,查明了研究区滑坡数量及特征,研究了滑坡与地质构造、工程地质岩组、斜坡结构、坡度、坡形和人类工程活动等孕灾因子的关系,总结该县滑坡发育特征与分布规律.结果表明:研究区共发育滑坡57处,多发育在坡度20°～30°范围内,相对高差主要在20～40 m之间,坡形以凸形坡为主.在地质构造方面,丰乐断层、大河断层、烂土断层影响较大,该区域发育地质灾害共35处.软质岩组、顺向坡结构的斜坡区与河流两侧地质灾害数量也较多.按照地质环境差异和滑坡分布规律进行孕灾地质条件复杂、中等和一般分区,研究成果可为地质环境条件相似的地区在风险防控方面提供参考.
Abstract
This work aims to improve the disaster prevention and reduction capabilities of geological disasters in Sandu County of Guizhou Province. Through data collection,geological disaster investigation,mathematical statistics and GIS spatial analysis,the number and characteristics of landslides in this area were identified,the relationship between landslides and geological structures,engineering geological rock formations,slope structures,slopes,slope shapes,and human engineering activities was analyzed,and the development characteristics and distribution patterns of landslides in the county were summarized. Results show that this area includes a total of 57 landslides,mostly within the slope range of 20°～30°,with a relative height difference of 20～40 m,and the slope shape is mainly convex. In terms of geological structures,the Fengle fault,Dahe fault,and Lantu fault exert a significant impact,with a total of 35 geological hazards in this area. Geological hazards were also developed in the slope areas of soft rock formations,along slope structures,and on both sides of rivers. According to the differences in geological environment and the distribution patterns of landslides,the zoning of disaster prone geological conditions can be classified into complex,moderate,and general ones. This research can provide reference for risk prevention and control in areas with similar geological environment conditions.
基金项目
贵州省科学技术厅项目(黔科合支撑[2023]一般127)
维普
万方数据