摘要
本文以四川省江油市为例,以区内152处崩塌点为数据样本,在对崩塌影响因素进行相关性分析的基础上,选取斜坡结构、工程地质岩组、地形坡度、高程、距断层距离、地震动峰值加速度、降雨量、距河流距离、距公路距离共9个崩塌影响因子,以地理信息系统(GIS)为平台,采用层次分析法和信息量模型等定性分析与定量计算相结合的方法,建立研究区崩塌易发性评价模型,并对各因子信息量值进行加权叠加,得到江油市崩塌易发性评价分区图。结果表明,崩塌高易发区面积占全市总面积的15.17%,中易发区占33.62%,低易发区占全市的46.23%,非易发区占全市总面积的4.98%。研究结果对江油市地质灾害危险范围预测及重点防治区域区划具有重要的指导意义。
This paper takes Jiangyou City,Sichuan Province as the study area and 152 collapse points as data samples,and selects a total of nine collapse influence factors,including slope structure,engineering geological rock group,topographicslope,elevation,distance from fault,peak ground acceleration,rainfall,distance from river and distance from highway.Basedon geographic information system(GIS),the evaluation model of the collapse susceptibility of the study area was established by combining qualitative analysis and quantitative calculation methods such as analytic hierarchy process(AHP) and information quantity model,and the weighted superposition of the information value of each factor was carried out to obtain the collapse susceptibility evaluation zoning map of Jiangyou City.The results showed that the area of the high-risk area accounted for 15.17% of the total area of the city,the medium-risk area accounted for 33.62%,the low-risk area accounted for 46.23%,and the non-risk area accounted for 4.98%.The results of this study have important guiding significance to the prediction of geological hazard scope and the zoning of key prevention areas in Jiangyou City.
作者
朱霞飞
文祎
ZHU Xia-fei;WEN Yi(Chengdu Surveying Geotechnical Research Institute Co,Ltd.of MCC,Chengdu,610023;Ziyang Airport Economic Zone Human Resource Management Center,Ziyang,641305)
出处
《四川地质学报》
2022年第4期701-708,共8页
Acta Geologica Sichuan
关键词
崩塌
影响因素
信息量模型
易发性评价
GIS
collapse
influencing factors
information content model
susceptibility evaluation
GIS
