四川省普格县滑坡孕灾环境因子敏感性分析  

Sensitivity Analysis of Hazard-brewing Environmental Factors of Landslides in Puge County of Sichuan Province

作　　者：王文坡 韩爱果[1] 任光明[1] 杨磊[3] 黄文芳 WANG Wen-po;HAN Ai-guo;REN Guang-ming;YANG Lei;HUANG Wen-fang(State Key Laboratory of Geohazard Prevention and Environment Protection,Chengdu Univerisity of Technology,Chendu 610059,China;Guizhou Zhengye Engineering Technology Investment Co.,Ltd., Guiyang 550005,China;Remote Sensing Center,Sichuan Grological Survey,Chengdu 610081,China;Economic Research Institute,State Grid Sichuan Electric Power Company(Chengdu Chengdian ElectricPower Engineering Design Co.,Ltd.),Chengdu 610041,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]贵州正业工程技术投资有限公司,贵阳550005 [3]四川省地质调查院遥感中心,成都610081 [4]国网四川省电力公司经济技术研究院(成都城电电力工程设计有限公司),成都610041

出　　处：《长江科学院院报》2018年第9期63-67,97,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家电网公司科技资助项目(SGSCJY00JHJS2016000)

摘　　要：四川西部是我国地质灾害高易发区。为了对滑坡孕灾环境因子的敏感性进行定量分析,以普格县境内分布的滑坡为例,基于变维分形理论、Arc GIS平台,借助累积和变换次数和分维值研究区内小、中、大型滑坡孕灾环境因子的敏感性,并引入分维值方差这一概念来度量分维值的离散程度。主要成果与结论为:(1)坡度、断裂和公路等因子对滑坡发育的影响较大,河流和起伏度等因子对滑坡发育的影响较小;(2)中型滑坡的孕灾环境因子分维值方差最大,小型滑坡次之,大型滑坡最小;(3)分维值为滑坡对孕灾环境因子的敏感性提供了定量的分析,而分维值方差为滑坡对各个孕灾环境因子敏感性程度的离散性进行了度量;(4)变维分形理论为滑坡灾害危险性评价中的孕灾环境因子权重提供了分形学依据。The west of Sichuan Proince is highly prone to geological disasters.In an attempt to quantify the sensitivity of landslide-brewing environmental factors(including fault,petrofabric,river,slope gradient,land relief,road,and elevation),the discrete degree of fractal dimension values of the abovementioned factors are measured by calculating the variance of fractal dimension values in association with ArcGIS.Landslide in Puge County of Sichuan Province are taken as research objective.The main results are concluded as follows:(1)Slope gradient,fault,and road have large impact on the development of landslide,while river and land relief has small influence on landslide development;(2)The variance of fractal dimension value of medium-sized landslide is the largest,followed by that of small landslide and large-scale landslide;(3)The sensitivity of landslide to hazard-brewing factors can be quantified by fractal dimension values,and the dicrete degree of the sensitivity can be measured by variance of fractal dimension values;(4)The variable dimension fractal theory provide a basis for obtaining the weights of hazard-brewing environmental factors in landslide risk assessment.

关 键 词：滑坡 变维分形理论 孕灾环境因子 敏感性分析 分维值 分维值方差 四川普格县 

分 类 号：P642.2[天文地球—工程地质学]