Monitoring of Benggang erosion based on UAV photogrammetry technology

Abstract

Abstract The benggang is seriously harmful for its tremendous amount of erosion. At present, the traditional methods in monitoring benggang gully are limit to some extent. The UAV photogrammetry technology combined with GIS spatial analysis was adopted to study the benggang in Bailu Village, Gan County, Jiangxi Province, South China. We measured some parameters and comparing the data of benggang at different times. ArcGIS was used to analyse the spatial and temporal distribution characteristics of benggang erosion. The results show that UAV photogrammetry technology has the advantages of high accuracy, high- speed and no damage to the surface ground, it can calculate the point cloud, reconstruct the benggang landform in three dimensions, and generate surface model DEM, which can provides an alternative for the study of benggang erosion monitoring.