摘要
基于遥感(RS)和地理信息系统(GIS)技术,采用多层次分析(AHP)法,以北京密云水库上游部分库区为研究对象,根据库区实际情况,选取植被覆盖率、土壤类型、坡度、高程、降雨量、土地利用六种影响滑坡灾害发生的因素作为评价因子,对区域滑坡风险进行分析。同时,在ArcGIS的空间分析环境中运行权重叠加,将研究区域划分成无危险区、低危险区、中危险区、高危险区和极危险区。结果表明,研究区域内大部分地区比较稳定,最易发生滑坡的区域主要集中在密云水库东北部的河谷、山谷地带,呈零星状分布。
Based on RS(remote sensing) and GIS(geographic information system),landslide risk analysis in Miyun reservoir area,Beijing is studied by AHP(analytic hierarchy process) method.Six evaluation elements including vegetation coverage,soil type,slope grade,elevation,rainfall,and land use selected for landslide venture analysis.The study area is divided into five regions by weight overlay as follows,landslide hardly ever happening,landslide difficultly happening,landslide possibly happening,landslide easily happening,landslide extremely easily happening.The results show that: large part of research area is relatively steady;the landslide easily happening area are mainly in the river valley and mountain valley located at the northeast part of Miyun reservoir,which is dispersively distributed.
出处
《地理信息世界》
2012年第3期78-83,87,共7页
Geomatics World
