基于因子分析法的白水河滑坡影响因素分析

Analysis of Landslide Influencing Factors Based on Factor Analysis

滑坡位移受众多因素影响,找出主要影响因素对于认识滑坡诱发机理、演化过程具有重要意义。以白水河滑坡为研究对象,依据2009—2011年位移监测资料,选取当月降雨量、前两月降雨量、当月库水位最高值、当月库水位平均值等4个影响因素作为变量进行因子分析,得到了反映白水河滑坡位移与外界诱因的两个主要因子和因子载荷矩阵,进而按年度分析了影响白水河滑坡位移的主要因素。综合分析4个影响因素在因子Ⅰ上的载荷量,得出各因素对白水河滑坡位移影响从大到小顺序为前两月降雨量>当月降雨量>月库水位最高值>月库水位平均值。

The landslide displacement, which is affected by many factors, so, it has great significance to find out the factors which play the main role for the landslide dynamic evolution and inducing mechanism. This paper took the Baishuihe landslide as an example, combined with the displacement monitoring data and selected the rainfall of current month, cumulative rainfall of anterior two months, the maximum reservoir level of current month and the average reservoir level as influencing factors for analysis. According to the analysis, two main factors and rotated component matrix were extracted. And the main influencing factors for the landslide displacement of every year were found out. Through the comprehensive analysis of the factor loadings in the four factors, we can get the influencing degree order for the Baishuihe landslide displacement evolution as follows:cumulative rainfall of anterior two months > rainfall of current month > maximum reservoir level of current month > the average reservoir level.