The Fractal Characteristics of the Watershed in the Landslides Area Based on Variational Method

Abstract

The fractal dimensions and their spatia1 Variation characteristics of 17 sub-watersheds in the study area from Badong county to Zigui county in TGP reservoir region were calcu1ated and analyzed based on the digital elevation model(DEM), the fundamental principle of Variational method and the functions of ArcGIS windows analysis. The results indicate that the topography of the sub-watersheds have obvious fractal features and that there are more landslides in the sub-watersheds with fractal dimension values ranging from 2.17 to 2.25, and there are some landslides in the sub-watersheds with fractal dimension values ranging from 2.40 to 2.53, and there are relatively few landslides in the sub-watersheds less than 2.17 and 2.25-2.40. The results show that fractal values of topography are closely related to the occurrence of the landslides.