基于GIS技术的区域性滑坡发生概率分析

SPATIAL PROBALITITY ANALYSIS OF LANDSLIDES BASED ON GIS TECHNOLOGY

在MAPGIS平台基础上,针对边坡空间失稳破坏的特征,采用GIS空间数据分析功能,探讨了三峡库区奉节段(三蹬子—王家河)主要滑坡的稳定状况,利用MAPGIS系统对其进行了边坡失稳的确定性系数(CF)计算,并进行滑坡因子敏感性分析,确定了各因子中对应于滑坡发生的最不利数值区间,得出在现有资料条件下,该区段滑坡发生的敏感条件为坡度和边坡所处位置高程的结论。

Spatial stability of slope is important in many engineering problems. Research on the susceptible factors of landslides is needed for the estimation of slope stability. In this research, the GIS technology is useful and important to analyze the spatial probability of landslide occurrence. In this paper GIS is used to study the spatial features of landslides along the bank of Fengjie district in the Three Gorges region. The susceptibility of landslide triggering factors is analyzed by means of the slope certainty factors (CF). The results show that the presented method is useful to study spatial distribution and occurrence of landslides in future.