摘要
在云安区1∶5万地质灾害详细调查的基础上,选取了地灾隐患点密度、坡度、高程、岩土类型、断裂密度、降雨及人类活动等7个评价因子,建立了各评价因子的ArcGIS空间数据库,通过对各评价因子分级量化及归一化处理后加权叠加,将云安区划分为高易发区、中易发区、低易发区及不易发区,分区结果能够很好的匹配野外调查结果,为云安区政府管理部门进行防灾减灾工作提供了可靠的科学依据。
Based on the detailed investigation of 1∶50000 geological hazards in Yun’an District,seven evaluation factors,such as density,slope,elevation,rock and soil type,fracture density,rainfall and human activities,were selected,and the ArcGIS spatial database of each evaluation factor was established.The Yun’an District was divided into four regions:high,middle,low susceptible zones and unsusceptible zone by the weighted superposition of each evaluation factor after classification,quantification and normalization of the evaluation factors.The results of this susceptibility division match well with those of field surveys.It provides a reliable scientific basis for the government management departments of Yun’an District to carry out disaster prevention and mitigation work.
作者
赵魁
ZHAO Kui(Chemical Geological Exploration Institute of Guangdong,Guangzhou 510800,China)
出处
《地质灾害与环境保护》
2020年第4期38-42,共5页
Journal of Geological Hazards and Environment Preservation
基金
广东省地质灾害详细调查项目(445323-201708-324002-0002)。
关键词
地质灾害
易发分区
ArcGIS空间分析
量化分级
geological hazard
susceptibility zoning
ArcGIS spatial analysis
quantification and classification
