摘要
地质灾害风险评价是地质灾害防治的基础性工作,目前常用的方法主要为层次分析法。通过ArcGIS软件,以斜坡为单元,选取多个评价因子,对罗田县城关镇进行地质灾害易发性评价、危险性评价及易损性评价,最后经过叠加进行风险评价及区划。结果显示,极高风险区呈条带状分布于中部人类工程活动强的区域,且随着降雨工况的增加,极高风险区面积逐渐增加,威胁对象及威胁资产也逐渐增加。
Geological disaster risk assessment is the basic work of geological disaster prevention and control,and the most commonly used method is the analytic hierarchy process.Using ArcGIS software,taking the slope as a unit and selecting multiple evaluation factors,evaluation of the susceptibility,risk and vulnerability of geological disasters is conducted in Chengguan Town,Luotian County.Risk evaluation and zoning through superposition are carried out.The results show that the extremely high-risk areas are distributed in stripes in the central area with strong human engineering activities,and with the increase of rainfall conditions,the area of extremely high-risk areas gradually increases while risk objects and risk assets also increase accordingly.
作者
谭伟
田巍
刘钢一
周佑平
TAN Wei;TIAN Wei;LIU Gangyi;ZHOU Youping(Hubei Geological Environment Station,Wuhan 430034,Hubei,China)
出处
《城市地质》
2022年第3期299-310,共12页
Urban Geology
关键词
层次分析法
地质灾害
风险评价
analytic hierarchy process
geological hazard
risk assessment
