基于GIS的东莞市斜坡地质灾害易发性评价

Evaluation of Susceptibility of Slope Geological Disastersin Dongguan City

近年来,东莞市斜坡地质灾害呈易发多发态势。通过收集以往地质灾害研究成果,整理野外调查数据,分析东莞市斜坡地质灾害发育的影响因素,选取并采用层次分析法来确定影响因素的权重,运用地质灾害综合指数法,计算出各评价单元的易发程度指数。最终利用GIS的空间分析功能得到东莞市斜坡地质灾害易发程度评价成果,划分出斜坡地质灾害高、中和低易发区,为东莞市开展地质灾害防治工作提供科学依据。

In recent years,slope geological disasters in Dongguan City have been prone to multiple occurrences.This paper collects past research results of slope geological disasters,collates field survey data,analyzes the influencing factors of the development of slope geological disasters in Dongguan City,selects and uses AHP to determine the weights of influencing factors,and uses the comprehensive index method of slope geological disasters to calculate proneness index of the evaluation units.In the end,the spatial analysis function of GIS is used to obtain the evaluation results of the degree of slope geological disasters proneness in Dongguan City,and the high,medium and low prone areas of slope geological disasters are classified to provide a scientific basis for the prevention and control of slope geological disasters in Dongguan City.