基于GIS及聚类分析法的抚顺地区地质灾害综合评价

Comprehensive evaluation of geological hazard in Fushun area based on GIS and clustering analysis

采用GIS手段建立研究区地质灾害的多影响因素空间数据库,确定本区域引发地质灾害的因素评价体系。运用GIS技术空间数据分析方法,结合评价分级准则,对地质灾害影响因素进行处理,采用聚类分析法初步确定4类地质灾害聚类区。Ⅰ类区为抚顺市区工程活动主导因素型地质灾害区;Ⅱ类区为沟谷盆地及其边缘工程活动诱发因素型地质灾害区;Ⅲ类区为北部及中部丘陵工程活动微弱因素型地质灾害区;Ⅳ类区为南部低山丘陵自然因素主导型地质灾害区。

The multi-factor spatial database of geological hazards in the studied area has been established by means of GIS,and determined the factor evaluation system which led to geological hazards.According to the evaluation and classification criteria,the authors dealt with the influence factors of geological hazards using spatial data analysis method of GIS,and determined four geological hazard cluster areas using clustering analysis.The Grade area Ⅰ was engineering activities dominant factor type,and mainly distributed in urban district of Fushun.The Grade area Ⅱ was engineering activities induced factor type,and distributed in valley basin and marginal area.The Grade area Ⅲ was engineering activities weak factor type,and distributed in northern and central hills.The Grade area Ⅳ was natural factor dominant type,and distributed in southern mountain.