Unoccupied Aircraft Systems (UASs) Reveal the Morphological Changes at Stromboli Volcano (Italy) before, between, and after the 3 July and 28 August 2019 Paroxysmal Eruptions
Unoccupied Aircraft Systems (UASs) Reveal the Morphological Changes at Stromboli Volcano (Italy) before, between, and after the 3 July and 28 August 2019 Paroxysmal Eruptions
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DOI：
10.3390/rs13152870
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发表时间：
2021-08-01
期刊：
影响因子：
5
通讯作者：
Taddeucci, Jacopo
中科院分区：
文献类型：
--
作者：
Civico, Riccardo;Ricci, Tullio;Taddeucci, Jacopo
2019年7月和8月，两次突发性喷发极大地改变了斯特龙博利火山（意大利）活动喷口所在的火山口台地的形态。在这里，我们记录这些形态的变化，通过使用2259 UAS派生的照片从八个调查和结构从运动（SfM）摄影测量技术，导致三维点云，orthomosaics，和数字表面模型（DSM）的分辨率范围从8.1到12.4厘米/像素。我们专注于火山特征的形态演变和体积变化的火山口阶地和下部斜坡（Sciara del Fuoco）的上部。我们确定了火山口阶地和熔岩场的变化，喷口转移到47米和火山灰沉积物的积累。与两次阵发性喷发（2019年5月至9月）相关的最大海拔变化范围分别为熔岩场和N火山口区域的+41.4至-26.4米。整个2018年9月至2020年6月，调查区域的总体积变化为+447，335 m（3）。尽管斯特龙博利火山是世界上研究得最好的火山之一，但这项研究的UAS摄影测量产品提供了对整个山顶区域前所未有的高时空分辨率观测，当时火山活动使得经典的实地检查和直升机飞越过于危险。无人机系统的应用是火山灾害评估和支持参与火山监测和平民保护行动的决策者的一个有效和不断发展的工具。
In July and August 2019, two paroxysmal eruptions dramatically changed the morphology of the crater terrace that hosts the active vents of Stromboli volcano (Italy). Here, we document these morphological changes, by using 2259 UAS-derived photographs from eight surveys and Structure-from-Motion (SfM) photogrammetric techniques, resulting in 3D point clouds, orthomosaics, and digital surface models (DSMs) with resolution ranging from 8.1 to 12.4 cm/pixel. We focus on the morphological evolution of volcanic features and volume changes in the crater terrace and the upper part of the underlying slope (Sciara del Fuoco). We identify both crater terrace and lava field variations, with vents shifting up to 47 m and the accumulation of tephra deposits. The maximum elevation changes related to the two paroxysmal eruptions (in between May and September 2019) range from +41.4 to -26.4 m at the lava field and N crater area, respectively. Throughout September 2018-June 2020, the total volume change in the surveyed area was +447,335 m(3). Despite Stromboli being one of the best-studied volcanoes worldwide, the UAS-based photogrammetry products of this study provide unprecedented high spatiotemporal resolution observations of its entire summit area, in a period when volcanic activity made the classic field inspections and helicopter overflights too risky. Routinely applied UAS operations represent an effective and evolving tool for volcanic hazard assessment and to support decision-makers involved in volcanic surveillance and civil protection operations.