基于GIS的彭州市崩塌滑坡地质灾害地形因素分析

Analysis of Terrain Factors for Landslide Hazards and Collapse Hazards in Pengzhou Based on GIS

基于ArcGIS平台,利用DEM数据资料,选择位于四川西北部的彭州市作为研究区域,提取了区内高程、地形起伏等地形因子;统计了5.12震后区内39个滑坡点,58个崩塌点,建立了地形地貌与崩塌滑坡地质灾害之间的关系:这类地区对应的地貌类型主要是海拔高程较高的山坡地带。实验证明,利用GIS技术,结合数字地面模型,进行崩塌、滑坡等地质灾害的地形因子相关性分析,结果可靠,对防灾减灾具有重要的借鉴意义。

In this paper, we used GIS technologies and DEM data to analyze Pengzhou geological hazards based on ArcGIS platform. The study area was located in Pengzhou, northwest of Sichuan Province. Aided by ArcGIS, we figured out the terrain factors including elevation and Relief Amplitude, and then analyzed the relationship between landslides, collapse and the terrain factors. The main conclusions are as followed. Such region corresponds to the type of landscape is the hillside area of higher elevation. The results show that the use of GIS technology, combined with digital terrain model, correlation analysis of the digital terrain model of the terrain, landslides and other geological disasters factor , test analysis results are reliable, and have a certain reference to the disaster prevention and mitigation.