贡献率法确定三峡库区滑坡发育环境本底因子  

Determination of landslide development topography factors in Three Gorges Reservoir area by using contributing rate method

作　　者：乔建平[1] 杨宗佶[1] 

机构地区：[1]中国科学院.水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《自然灾害学报》2008年第5期47-51,共5页Journal of Natural Disasters

基　　金：国家"十一五"重点攻关项目(2006BAC04B05)

摘　　要：滑坡发育环境本底因子的定量化求解是滑坡成因研究的重要课题。在传统方法的基础上,采用贡献率法,即因子贡献率=因子贡献指数/因子贡献指数总数×100%,并通过GIS技术定量统计了三峡主要滑坡段(云阳—巫山)的滑坡与环境本底因子的区域相关关系,得到岩性、坡度、坡形、高差、坡向5个主要因子的贡献量,并评价了各个因子对滑坡发育的贡献程度。The quantitative determination of environmental background factors of landslide growth is an important aspect in landslide development research. This paper uses contributing rate method,i, e. contributing rate of factors is egual to contributing rate index/total contributing rate × 100%. Based on GIS technology, the regional correlation between the landslide in lnain landslide segment of Three Gorges and the environmental background factors were detennined statistically, and the values of contributing rate of 5 primary factors, i. e. stratum, gradient, slope shape, relative height of slope and aspect of slope were obtained and the contributing rate range of each factors landslide growth were evaluated.

关 键 词：贡献率 三峡水库 滑坡 因子 

分 类 号：P642.22[天文地球—工程地质学]