摘要
根据京山县1∶5万地质灾害详细调查资料,选取衡量崩滑流地质灾害发育现状和影响其发生、发展的7个影响因子,采用层次分析法计算各单因子的权重,并基于ArcGIS技术,将各因子进行信息提取得到各因子图层后,再对图层进行加权叠加分析,分别以网格和小流域为评价单元对京山县的崩塌、滑坡、泥石流、不稳定斜坡等地质灾害进行易发性分区,对比分析两种评价单元的分区结果。通过对比,小流域评价单元比网格单元更适合地质灾害易发性分区。
According to the detailed survery data of 1∶50000 geological disasters in Jingshan County,seven factors affecting the development of geological disasters and the occurrence and development of geological disasters are sclected.The weights of each single factor are calculated by AHP,and based on ArcGIS,the technology extracts the factors to obtain the factor layers,and then performs weighted overlay analysis on the layers.The grids and small watersheds are used as evaluation units to geological disasters such as collapse,landslide,debris flow and unstable slopes in Jingshan County.The results of the two evaluation units are compared and analyzed.By comparison,the small watershed evaluation unit is more suitable for the geological disaster susceptibility zoning than the grid unit.
作者
侯轶攀
杨宜军
王鹏来
Hou Yipan;Yang Yijun;Wang Penglai(Hubei Institute of Hydrogeology and Engineering Geology,Jingzhou,Hubei 434020)
出处
《资源环境与工程》
2019年第S01期36-42,共7页
Resources Environment & Engineering
关键词
层次分析法
ARCGIS
小流域
地质灾害易发性分区
analytic hierarchy process
ArcGIS
small watershed
geological disaster-prone partition
