鄂西北区域滑坡形成影响因子及组控模型研究

Regional Landslide Formation Influence Factors and Group Control Model at the Northwest of Hubei

以鄂西北竹山县浅变质岩区267个滑坡为研究对象,在构建区域滑坡形成影响因子体系的基础上,运用综合贡献率统计方法,对滑坡形成的11个静态本底因子和3个动态诱发因子的敏感性要素进行了分析。采用量化赋值与主成分分析相结合的方法,得出各静态本底因子的影响权重以及6个主控因子;同时构建了基于主成分分析定权的滑坡形成影响综合评价模型。最后提出滑坡形成过程中基于地质因素的静态本底主控因子和基于环境因素的动态诱发因子的组控模型。为区域滑坡孕灾机理及滑坡风险分析等提供一定依据。

Taking the 267 landslides in the low-grade metamorphic rock district at the northwest of Hubei Zhushan as the research object,on the basis for the construction of regional landslide formation influence factors system,using the method of comprehensive contribution rate of statistical methods for landslide,the sensitivity factor of landslide formation with 11 static background factors and 3 dynamic inducing factors were analyzed. Using the method by combining with quantitative valuation and principal component analysis to get the weight of each static background factor and 6 main-control factors,at the same time a landslide formation influence comprehensive evaluation model which based on principal component analysis fixed weight was build. Finally a group control model based on the static background main controlling factors of geological factors and the dynamic inducing factors of environmental factors in the process of landslide rming were put forward. The basis for regional landslide formative mechanism and landslide risk analysis are toprovided.