STUDY ON THE APPLICATION OF AIRBORNE LIDAR IN SEISMIC ACTIVE FAULTS IN THE NORTHERN RIM OF QINLING MOUNTAIN AND THE PIEDMONT OF HUASHAN IN CHINA
- Aerial Photogrammetry and Remote Sensing Group Co., Ltd, Shaanxi, China
Keywords: Airborne LiDAR, High-precision DEM, Active fault, Microtopography, Data pre-processing, Data post-processing
Abstract. Seismic active faults are closely related to earthquake disasters. Active faults determine the location and magnitude of destructive earthquakes. Therefore, strengthening active fault investigation and research is one of the main ways to reduce earthquake disasters. Airborne LiDAR, as a measurement method that can quickly obtain large-area and high-precision DEM results, can not only obtain structural distribution features of large-scale study areas on a macro scale, and determine the location and trend of active faults, but also be used to identify microstructural landforms and take researches on fine geomorphic structural features. In this paper, based on the detailed introduction, analysis and summary of the technical schemes, data processing and application of the airborne LiDAR technique in the northern margin of the Qinling Mountains and the Huashan Piedmont Fault Zone, it was demonstrated on the basic methods and technical advantages in seismic active faults and geomorphological research work of the airborne LiDAR technology, and a new and efficient method for seismic fault study was provided.