长江科学院院报2018，Vol.35Issue(5)：41-46,51,7.DOI:10.11988/ckyyb.20170418
宣汉地区降雨型滑坡空间发育规律及敏感性分析
Spatial Development Law and Sensitivity Analysis of Rainfall-induced Landslide in Xuanhan County
摘要
Abstract
Xuanhan County is a region with well-developed geological hazard in Dazhou,Sichuan Province.To study the distribution and stability of landslides in this region,we analyzed the sensitivity of hazard-inducing factors close-ly related to landslide distribution and stability, inclusive of slope gradient, elevation, slope direction, lithology, water system and traffic road,in association with GIS technology and certainty factor based on field survey. Results conclude that landslide is mostly affected in 1) elevation between 400-1 000 m,mainly at 400-600 m;2) slope gradient between 5°-25°,mainly at 5°-15°;3) 800 m from water and road buffer zones, especially 400 m from road buffer zone. Furthermore,we adopted the susceptibility coefficient ratio and the susceptibility index to further analyze the influence of the factors on the distribution and stability of landslide. Result shows that slope gradient factor plays an important role in the stability of rainfall-induced landslide,but its influence on landslide distribution is weaker than that of traffic road factor.关键词
降雨型滑坡/宣汉地区/致灾因子/确定性系数/敏感性分析/影响程度Key words
rainfall-induced landslide/Xuanhan county/disaster factors/certainty factor/sensibility analysis/in-fluence degree分类
天文与地球科学引用本文复制引用
邵山,汤明高,聂兵其,李云杰,王飞龙,杨何..宣汉地区降雨型滑坡空间发育规律及敏感性分析[J].长江科学院院报,2018,35(5):41-46,51,7.基金项目
国家重点基础研究发展计划项目(2013CB733202) （2013CB733202）
国家自然科学基金创新研究群体项目(41521002) （41521002）
