广西滑坡灾害的空间分布特征及其影响因子研究

Research on the Spatial Distribution Characteristics and Influence Factors of Landslide Disasters in Guangxi

基于广西地质灾害信息系统中的历史滑坡灾害点数据,利用空间自相关方法分析了广西滑坡地质灾害的空间分布特征,并运用地理探测器探究了广西滑坡地质灾害空间分布特征及其影响因子的关系。结果表明:①广西滑坡地质灾害集中分布在东部地区,且危险性明显高于西部地区;②降雨对广西滑坡灾害空间分异的解释力最强,高程、地形起伏度、岩性、断裂与人类活动也具有一定的解释力;③各因子之间交互作用对滑坡灾害的空间分异性影响表现为双因子增强与非线性增强,大部分因子之间交互作用的结果为非线性增强,其中岩性与降雨交互作用的解释力最大(q=0.1840)。研究结果可为广西滑坡地质灾害的防治工作提供参考。

Based on the historical landslide disaster point data in Guangxi geological disaster information system,we used spatial autocorrelation method to analyze the spatial distribution characteristics of Guangxi landslide geological disasters,and explored the relationship between spatial distribution characteristics and influence factors of landslide geological hazards in Guangxi by means of GeoDetector.The research results show that①the landslide geological disasters in Guangxi are concentrated in the eastern region,and the risk of landslide geological disasters in the eastern region is obviously higher than that in the western region.②Rainfall has the closest relation to the spatial specificity of landslide disasters in Guangxi.Elevation,topographic fluctuation,lithology,fracture and human activity factors also have a certain relation.③The interaction influence between various factors on the spatial specificity of landslide disasters in the study area is manifested by the two-factor enhancement and nonlinear enhancement.Most of the interactions between the factors resulted in a nonlinear enhancement.Among them,the interaction between lithology and rainfall has the greatest influence(q=0.1840).The research results can provide a reference for the prevention and control of landslide geological disasters in Guangxi.