摘要
基于ArcGIS空间分析,对四川省雅安市进行地质灾害危险性评价,选取高程、坡度、坡向、年均降雨量、土地利用类型、断层距离、道路距离和水系距离作为地质灾害危险性区划因子,应用信息量模型分别对滑坡、崩塌和泥石流进行危险性评价,进而采用栅格最大值法实现综合地质灾害风险评价,将雅安市的地质灾害危险区划分为极低、低、中、高和极高危险区。结果表明:研究区内极高危险区主要分布在道路和水系两侧沿线,极低危险区主要位于人类工程活动少的区域;极高危险区和高危险区面积占比14.9%,灾害率为69.1%,灾害点空间分布与危险等级呈正相关性,表明雅安市灾害危险性区划较为合理,研究成果将为该地区地质灾害风险评价提供良好的依据。
Based on ArcGIS spatial analysis,a geological hazard risk assessment was conducted in Ya'an City,Sichuan Province.Elevation,slope,aspect,average annual rainfall,land use type,distance from faults,distance from roads,and distance from water systems were selected as the geological hazard zoning factors for Ya'an City.Information quantity models were used to evaluate the hazards of landslides,collapses,and mudslides,Furthermore,the grid maximum method is used to achieve comprehensive geological hazard risk assessment,and the geological hazard risk areas in Ya'an City are divided into extremely low,low,medium,high,and extremely high-risk areas.The research results indicate that the extremely high-risk areas in the study area are mainly distributed along both sides of roads and water systems,while the extremely low-risk areas are mainly located in areas with low human engineering activities;The area of extremely high risk areas and high-risk areas accounts for 14.9%,with a disaster rate of 69.1%.The spatial distribution of disaster points is positively correlated with the risk level,and the verification results indicate that the disaster risk zoning in Ya'an City is relatively reasonable,and the research results will provide a good basis for geological disaster risk assessment in the region.
作者
吴亚平
周学云
孙英耀
曾普
WU Yaping;ZHOU Xueyun;SUN Yingyao;ZENC Pu(Ya'an Meteorological Bureau,Ya'an 625000,China;Ya'an Natural Resources and Planning Bureau,Ya'an 625000,China)
出处
《成都信息工程大学学报》
2025年第2期251-256,共6页
Journal of Chengdu University of Information Technology
关键词
信息量模型
危险性评价
地质灾害
雅安市
information quantity model
hazard assessment
geological hazards
Ya'an city
作者简介
通信作者:周学云.E-mail:42333700@qq.com。
