摄影测量学
地理信息学
山崩
变更检测
悬崖
地质学
点云
海岸侵蚀
腐蚀
由运动产生的结构
遥感
人类住区
地貌学
正射影像
自然地理学
地理
考古
工程类
运动(物理)
古生物学
人工智能
机械工程
计算机科学
作者
Giuseppe Esposito,Riccardo Salvini,Fabio Matano,Marco Sacchi,M. Danzi,Renato Somma,Claudia Troise
摘要
Abstract Monitoring of geomorphic changes affecting sea cliffs poses a difficult challenge from a logistical point of view. Nevertheless, this activity is fundamental for the evaluation of cliff recession rates and the assessment of risk conditions affecting coastal settlements. Innovative geomatics techniques provide a valid contribution to detect cliff topographic modifications induced by erosion or landslide processes. This study presents a photogrammetric approach based on structure from motion (SfM) aimed at monitoring the geomorphic evolution of a coastal landslide that displaced about 40 000 m 3 of material in southern Italy. The landslide was monitored for more than two years, comparing multitemporal 3D point clouds derived from SfM. The results of change detection analysis allowed quantifying the volumes of rocks and unconsolidated sediments mobilised by erosion processes after the main failure, and developing a sediment budget. The study highlighted the high erodibility of collapsed material, as well as the suitability of the adopted techniques for 3D change detection analyses.
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