摘要
在惠州市惠城区,选取坡度、坡形、地形起伏度、地质构造、岩土体类型、植被覆盖、土地利用类型7种评价因子,以127处已发地质灾害点作为样本进行建模,采用ArcGIS10.8算出已发灾害点在各因子类别所占的比例,运用信息量法公式算出各因子的信息量值,并将各评价因子的权重与其对应信息量进行叠加,得到区内每个栅格单元的地质灾害易发性评价数值,将易发性评价栅格数值进行重分类,经统计分析后将惠城区地质灾害易发性划分为中易发、低易发、非易发3种等级。评价结果能够为惠州市惠城区地质灾害预测及防治提供地质依据。
In Huicheng District,Huizhou City,7 evaluation factors including slope,slope shape,relief degree,geological structure,rock-soil type,vegetation cover and land use type were selected,taking 127 geological disaster spots as samples,ArcGIS 10.8 was used to calculate the proportion of disaster spots in each factor category,and the information value of each factor was calculated by using the formula of information quantity method,the weights of each evaluation factor are superimposed on the corresponding information,and the numerical results of the geological disasters vulnerability evaluation for each grid unit in the whole region are obtained,and the grid values of the vulnerability evaluation are reclassified.Based on the principle of similarity,the vulnerability of geological disasters in Huicheng District is divided into three grades:medium-risk,low-risk and non-risk.The evaluation results can provide a geological basis for the prediction and prevention of geological disasters in Huicheng District,Huizhou City.
作者
王金秋
WANG Jinqiu(Guangdong Institute of Nuclear Industry Geological Survey,Guangzhou 510800,Guangdong,China)
出处
《资源信息与工程》
2024年第5期96-101,共6页
Resource Information and Engineering
基金
广东省惠州市惠城区地质灾害风险调查评价(1:5万)项目(441301-2022-01335)。
关键词
信息量法
地质灾害
易发程度
评价因子
惠州市惠城区
information quantity method
geological disasters
susceptibility
evaluation factors
Huicheng District,Huizhou City
