基于分形理论的滑坡空间分布特征研究

Characteristics of Landslide Spatial Distribution Based on Fractal Theory

以"汶川地震"极端事件为时间分段点,基于ArcGIS网格法定量分析汶川地震重灾区滑坡空间分布的分形分维特征,得出汶川地震重灾区滑坡在震前和震后均具有分形特征。研究表明,汶川地震重灾区滑坡点的空间分布具有统计意义上的自相似结构,无特征尺度。基于分形理论的汶川地震重灾区滑坡空间分布特征分析为进一步研究滑坡的敏感性、危险性及滑坡风险预警奠定了重要的理论基础和前提。

By taking Wenchuan Earthquake as the segmentation point,and based on ArcGIS grid-based method,fractal dimension characteristics of the landslides spatial distribution in the study area are quantitatively analyzed. The results confirm the fractal characteristics of landslide in the study area before and after the earthquake. Research shows that： the landslide point spatial distribution of Wenchuan Earthquake heavy disaster area is of selfsimilar structure and of none characteristic scale. The landslide distribution characteristics analysis on Wenchuan Earthquake heavy area based on fractal theory provides an important foundation and prerequisite for the further study of landslide sensitivity,landslide hazard and landslide risk warning.