Abstract：We take the typical surface rupture caused by the Luhuo M7.9 earthquake in 1973 as an example. Based on the UAV SfM method, we obtain high resolution and high precision topographic and geomorphic data in the region. We extract the quantitative parameters of dislocation by LaDiCaoz and introduce the relevant technical process in detail. The results show that: 1) The horizontal dislocation and vertical dislocation of typical ridge dislocations in Luho Zhajiao village area measured by LaDiCaoz are 6.3(+0.5/－0.7) m and 0.4(+0.1/－0.1) m. The analysis shows that the amount of horizontal dislocation is the cumulative result of 3 strong earthquakes at least. 2) UAV SfM method can obtain high resolution and high precision topographic and geomorphic data in a small area efficiently, conveniently and at a low cost. The data quality can satisfy the fine structure study of active faults and quantitative parameter extraction, which has a broad application prospect in the high altitude of western Sichuan. 3) Using LaDiCaoz for dislocation extraction can further reduce the error of measurement results caused by human factors, and the reliability of dislocation results can be verified, realizing the semi-automatic extraction of active fault dislocation.
LIAO Cheng,Liang Mingjian,Zhou Wenying et al. Quantitative Parameter Extraction of Seismic Surface Rupture Based on SfM Method and LaDiCaoz: Take the Typical Surface Rupture in Luho Zhajiao Village Area as an Example[J]. jgg, 2024, 44(2): 183-188.