山区脆弱环境下公路选线的危险度区划

山区公路灾害的频繁发生，严重威胁着线路行车和人民生命财产安全，并严重制约着山区经济可持续发展，因此，作好山区环境脆弱区段公路的选线工作尤为重要。本文以公路环境脆弱的迫隆藏布流域为例，在分析研究了影响山区公路灾害发生发育的因素的基础上，从防灾减灾及改善公路工程对生态环境影响的角度出发，采用GIS的信息处理和空间分析方法，实现了基于山区环境脆弱区段公路选线的危险度区划。

Highway Alignment of Risk Zoning Under Vulnerable Environment

Abstract In the mountain areas, road disasters occurred frequently which threat the safety of the road and the people＇ s lives and property. Moreover, the development of society and econo- my is also restricted. Therefore alignment of mountain road is especially important in hazardous mountain areas. In this paper, taking the road disaster-prone Polongzangbu River Basin for instance, the risk zon- ing of road alignment in mountain disaster-prone section was achieved by using GIS information process- ing and spatial analysis based on the analysis of the factors which impact the development of disasters of mountain roads from the perspectives of prevention and mitigation of disasters and improvement of road engineering to the impacts of entironment.