摘要
地质灾害影响因子合理选取及因子优化分级是准确评价地质灾害易发性的关键。文章收集了吉安市地质灾害详细调查资料,全面掌握了区域滑坡灾害发展现状与影响因素。通过分析,最终选定高程、坡度、坡向、岩性、道路、降水6个因子,并对各因子进行了合理优化分级。利用ArcGIS空间分析功能构建各类因子信息量模型,依据各因子信息量进行空间叠加分析,计算多因素综合信息量。最后按照自然断点法对研究区进行滑坡易发性分区,共划分为高易发区、中易发区、低易发区、不易发区4个等级,分别占总面积比例:8.27%、20.42%、45.52%、25.79%。研究结果可为吉安市滑坡灾害的预防和治理提供科学依据,有助于提高区域防灾减灾能力。
The rational selection and the optimized grading of the influencing factors for geological hazards are crucial to accurately evaluate the geological disaster susceptibility.This study collected detailed investigation data on geological hazards in Ji'an City,comprehensively grasping the current development status and influencing factors of regional landslide disasters.Six factors including elevation,slope,aspect,rock type,road,and precipitation were finally selected through analysis,and these factors were reasonably optimized and graded.Using the spatial analysis function of ArcGIS to construct information quantity models for various factors,and then conducting the spatial superposition analysis according to the information quantity of each factor to calculate the comprehensive information quantity of multi-factors.Finally,the landslide susceptibility zoning of the study area was carried out according to the Natural Breaks Classification method:high,moderate,low,and very low susceptibility zones,accounting for 8.27%,20.42%,45.52%,and 25.79%of the total area,respectively.The research results can provide scientific basis for the prevention and control of landslide disasters in Ji'an City,which is helpful to improve the regional disaster prevention and reduction.
作者
兰盈盈
江嘉豪
林鼎
LAN Yingying;JIANG Jiahao;LIN Ding(School of Hydraulic Engineering,Jiangxi University of Water Resources and Electric Power,Nanchang Jiangxi,330099,China;Dongguan Water Resources Survey and Design Institute Co.Ltd.,Dongguan Guangdong,523000,China)
出处
《江西水利科技》
2025年第4期260-264,共5页
Jiangxi Hydraulic Science & Technology
关键词
滑坡灾害
易发性评价
ARCGIS
信息量模型
Landslide disaster
Susceptibility evaluation
ArcGIS
Information volume model
