Risk assessment of landslide disasters in mountainous areas based on oblique photogrammetry
LE Qingyuan
ZHANG Xinjie
Abstract：In order to solve the problem of geological disasters in mountainous areas,this paper proposes to use UAV oblique photogrammetry technology to construct a three-dimensional real-world model of mountainous areas to achieve efficient identification and effective prevention and control of geological disasters.By analyzing the differences in texture,color and structural characteristics of rock mass in the 3D model,different types of disaster points such as collapses and landslides can be accurately identified.The analytic hierarchy process was used to evaluate eight influencing factors,including normalized vegetation index,strata,aspect,slope,slope height,strata,distance from river and distance from road.The results showed that the danger area could be divided into five grades:high,high,medium,low and low,accounting for 6.62%,25.36%,31.68%,25.32%and 11.58%,respectively.This method can identify and evaluate the disaster risk of collapse and landslide in mountainous areas at an early stage,and provide a reference for disaster prevention and control.
Keywords：oblique photogrammetrygeological hazards3D modelcollapselandslide
Publication Date：2025-07-31
Pages：3( 109-111 )