地质与资源2025，Vol.34Issue(3)：361-370,394,11.DOI:10.13686/j.cnki.dzyzy.2025.03.010
基于变形区识别的山区乡镇地质灾害易发性评价优化方法
Optimization of geological hazard susceptibility assessment in mountainous townships based on identification of deformation zones
摘要
Abstract
The Renzong Subdistrict in Xi'an City is a typical mountainous township characterized by complex geology,frequent human engineering activities,and recurrent landslide and collapse disasters.To reasonably predict the spatial distribution characteristics of geohazards in mountainous townships,this paper selects Renzong as the study area for the optimization methods of geohazard susceptibility assessment in mountainous townships.Based on the large-scale geohazard survey and analysis of disaster-pregnant conditions,taking grid cells as the evaluation units,nine impact factors,including slope gradient,slope height,slope aspect,slope type,engineering rock group,slope structure,distance from roads,slope cutting degree,and vegetation coverage,are selected for geohazard susceptibility assessment in the study area with composite index method.Besides,the deformation zones and geohazard sites identified by field survey are rasterized and quantified to optimize the evaluation results of composite index method,with validation by ROC curves.The results show that the evaluation precision has increased from 81.7％to 92.4％,effectively enhancing the accuracy of geohazard susceptibility assessment for townships.The method provides a scientific basis for geohazard prevention and mitigation.关键词
地质灾害/易发性评价/综合指数法/变形区识别/山区乡镇Key words
geological hazard/susceptibility assessment/composite index method/identification of deformation zone/mountainous township分类
天文与地球科学引用本文复制引用
强林,王鲜,郝业,李博文,胡鹏,韩秀清,杨伟光..基于变形区识别的山区乡镇地质灾害易发性评价优化方法[J].地质与资源,2025,34(3):361-370,394,11.基金项目
陕西省自然资源厅项目"陕西省西安市临潼区仁宗街道1/1万地质灾害风险调查评价"(陕自然资勘发[2022]13号). （陕自然资勘发[2022]13号）
