Abstract
Understanding the history and current status of geological hazards through advance geological surveys is of great significance for ultimately achieving identification and early warning of potential disasters. Currently, traditional manual ground survey methods struggle to detect and investigate major geological hazards and hidden dangers in complex mountainous areas characterized by dense vegetation cover or steep terrain. In contrast, aerial remote sensing, as a multifunctional comprehensive detection technology, can efficiently acquire the development, distribution characteristics, and spatiotemporal evolution patterns of geological hazards due to its unique field-of-view angle and independence from ground condition constraints. First, this paper summarizes the types and development trends of commonly used aerial remote sensing platforms in the field of geological hazards, and analyzes the advantages of information processing technologies for different payload sensors and the main geological hazard problems they address. Second, it reviews the key research achievements of aerial remote sensing technology in five application stages of geological hazards: basic topographic mapping, early identification, investigation and evaluation, medium- to long-term monitoring, and emergency response, and discusses the requirements, advantages, and disadvantages of various technical methods at different stages. Finally, it summarizes the deficiencies in the application research of aerial remote sensing technology in the field of geological hazards, and clarifies future development trends and recommendations.
Full Text
Application of Aerial Remote Sensing in Geological Hazards: Current Status and Prospects
DONG Xiujun¹, DENG Bo¹, YUAN Feiyun², FU Xia², ZHANG Wenju², JU Yuanzhen¹, REN Xiaohu³
¹ State Key Laboratory of Geo-hazard Prevention and Geo-environmental Protection, Chengdu University of Technology, Chengdu 610059
² Sichuan Tibetan Area Expressway Co. Ltd, Chengdu 610041
³ Chongqing Institute of Geology and Mineral Resources, Chongqing 401120
Abstract
Understanding the history and current status of geological hazards through comprehensive surveys is crucial for ultimately achieving potential disaster identification and early warning. At present, traditional manual ground-based investigation methods struggle to detect and characterize major geological hazards and hidden dangers in complex mountainous regions characterized by dense vegetation cover or steep terrain. Aerial remote sensing, as a multifunctional and comprehensive detection technology, can efficiently acquire the developmental distribution characteristics and spatiotemporal evolution patterns of geological hazards due to its unique field-of-view angles and independence from ground conditions.
This paper first summarizes the types and development trends of commonly used aerial remote sensing platforms in the field of geological hazards, and analyzes the information processing advantages of different payload sensors as well as the primary geological hazard problems they address. Second, it reviews key research achievements of aerial remote sensing technology across five application stages: basic topographic mapping, early identification, investigation and evaluation, medium- and long-term monitoring, and emergency response, while discussing the technical method requirements, advantages, and limitations of various approaches at different stages. Finally, the paper concludes by summarizing the deficiencies in current application research of aerial remote sensing technology in geological hazard management and elucidates future development trends and recommendations.
Keywords: Geological hazards; Aerial remote sensing; Airborne LiDAR; UAV; Photogrammetry