[MTT47-P05] Estimating Eruptive Volumes of Mud Volcano Southwestern Taiwan by Using UAV and SfM-MVS Photogrammetry
Keywords:UAS, GNSS, digital surface modeling, control survey
Since the sporadic eruption make different for rapid survey by using traditional methods, we take advantage of unmanned aerial vehicles (UAV) to design a survey network specifically. Therefore, we estimate the eruptive volumes of recent eruptions for the Wandan mud volcano by using aerial images taken from UAV, and 3D models derived from the structure-from-motion (SfM) photogrammetry technique. We use RTK-GPS and leveling for horizontal and vertical measurements of ground control point, respectively. We use the SfM software to generate DSMs, point clouds, and orthophotos with cm-level accuracy. We estimate the eruptive volume by subtracting the pre-eruption DSM from the post-eruption DSM. Our results show that for the event on 15 May, 2018, the eruptive area is 12,761 m2 and the volume is 13,106.3625 ±13.0105m3.