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Implementing an efficient beach erosion monitoring system for coastal management in Croatia

机译：在克罗地亚为海岸管理实施有效的海滩侵蚀监测系统

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摘要

This paper proposes a coastal erosion monitoring system for beach erosion management, which we demonstrate on natural and artificial pocket gravel beaches in Croatia. The approach uses low-cost Structure-from-Motion (SfM) photogrammetric imaging and multi -view stereo (MVS) to produce high -resolution 3D beach models for detecting morphological changes and erosion occurrence. Coastal state indicators, such as the shoreline position and subaerial beach volume, are derived from the 3D models and used to quantify changes between surveys. The method is illustrated through two case studies and, to our knowledge, these are the first repetitive measurements taken on the Croatian eastern Adriatic Coast (CEAC). In case of the natural Brse4 beach, beach rotation was found to be a response to natural forcing from waves of various incident directions. For the artificial Dugi Rat beach, which loses sediment every winter and is subsequently re-nourished every spring, monitoring showed that beach nourishment is of limited durability. Both case studies showed that the SfM-MVS technique is suitable for the rapid and frequent acquisition of 3D survey data, from which quantitative coastal indicators can be derived to inform future coastal management interventions. Significantly, this low-cost data acquisition has a great potential for regular beach management survey.
机译：本文提出了一种用于海滩侵蚀管理的海岸侵蚀监测系统，我们将在克罗地亚的天然和人工口袋砾石海滩上进行演示。该方法使用低成本的运动结构（SfM）摄影测量成像和多视图立体（MVS）来生成高分辨率3D海滩模型，以检测形态变化和侵蚀发生。海岸状态指标（例如海岸线位置和海底沙滩容量）是从3D模型得出的，用于量化两次调查之间的变化。通过两个案例研究说明了该方法，据我们所知，这是在克罗地亚东部亚得里亚海岸（CEAC）上进行的首次重复测量。在天然Brse4海滩的情况下，发现海滩旋转是对各种入射方向波的自然强迫的响应。对于人工的Dugi Rat海滩，该海滩每年冬天都会减少沉积物，然后在每个春季重新进行营养，监测表明，海滩营养的持久性有限。这两个案例研究均表明，SfM-MVS技术适用于快速且频繁地获取3D调查数据，可以从中得出定量的沿海指标来为将来的沿海管理干预提供依据。值得注意的是，这种低成本的数据采集具有定期进行海滩管理调查的巨大潜力。

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