摘要
我国川气东送管道(川渝段)多穿越山区,地形高低起伏较大、复杂,地貌形态多样,且地质灾害突出。为了对管道沿线地质灾害进行预警预报,本文以ArcGIS为平台,借助其强大的空间分析功能,以滑坡为例,运用模糊逻辑法建模,并通过模糊综合运算得到了不同的Gamma值对应的概率值,选取Gamma值为0.9时的滑坡后验概率分布图进行统计分区,并对后验概率值进行重分类,最终得到危险性等级分别为高、中、低的滑坡危险性分区图,以为保证川气东送天然气管道的安全运营提供决策支持。
Sichuan-east gas pipeline(Sichuan-Chongqing section)passes through mountains where the terrain is complex,the topography is diverse and geological hazards take place frequently.For the purpose of warning and forecasting the geological hazards along the pipeline,this paper takes landslides in the study area as an example,applies fuzzy logic method based on ArcGIS to modeling and calculates landslide probability values with different gamma values.Then the paper calculates the posterior probability values when gamma is 0.9and reclassifies the posterior probability values.Finally,the paper obtains the zoing map of landslide risk evaluation for the study area with high,medium and low risk levels.The research could provide decision support for the safety operation of Sichuan-east gas pipeline.
出处
《安全与环境工程》
CAS
北大核心
2013年第6期38-42,48,共6页
Safety and Environmental Engineering
基金
国家重点基础研究发展计划(973计划)重大项目(2011CB710601)
