Geomorphological Evolution of Volcanic Cliffs in Coastal Areas: The Case of Maronti Bay (Ischia Island)

IF 2.4 Q2 GEOSCIENCES, MULTIDISCIPLINARY Geosciences (Switzerland) Pub Date : 2023-10-17 DOI:10.3390/geosciences13100313
Luigi Massaro, Giovanni Forte, Melania De Falco, Antonio Santo
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Abstract

The morphoevolution of coastal areas is due to the interactions of multiple continental and marine processes that define a highly dynamic environment. These processes can occur as rapid catastrophic events (e.g., landslides, storms, and coastal land use) or as slower continuous processes (i.e., wave, tidal, and current actions), creating a multi-hazard scenario. Maronti Bay (Ischia Island, Southern Italy) can be classified as a pocket beach that represents an important tourist and environmental area for the island, although it has been historically affected by slope instability, sea cliff recession, and coastal erosion. In this study, the historical morphoevolution of the shoreline was analysed by means of a dataset of aerial photographs and cartographic information available in the literature over a 25-year period. Furthermore, the role of cliff recession and its impact on the beach was also explored, as in recent years, the stability condition of the area was worsened by the occurrence of a remarkable landslide in 2019. The latter was reactivated following a cloudburst on the 26th of November 2022 that affected the whole Island and was analysed with the Dem of Difference technique. It provided an estimate of the mobilised volumes and showed how the erosion and deposition areas were distributed and modified by wave action. The insights from this research can be valuable in developing mitigation strategies and protective measures to safeguard the surrounding environment and ensure the safety of residents and tourists in this multi-hazard environment.
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沿海地区火山悬崖地貌演化:以马龙蒂湾(Ischia Island)为例
沿海地区的形态演变是由于多种大陆和海洋过程的相互作用,这些过程定义了一个高度动态的环境。这些过程可以作为快速的灾难性事件(例如,滑坡、风暴和沿海土地利用)发生,也可以作为较慢的连续过程(例如,波浪、潮汐和洋流的作用)发生,从而形成多灾害情景。马龙蒂湾(意大利南部伊斯基亚岛)可以被归类为一个口袋海滩,代表了该岛重要的旅游和环境区域,尽管它在历史上受到斜坡不稳定,海崖衰退和海岸侵蚀的影响。在这项研究中,海岸线的历史形态演变通过25年期间的航空照片和文献中可用的地图信息数据集进行了分析。此外,还探讨了悬崖衰退的作用及其对海滩的影响,因为近年来,该地区的稳定状况因2019年发生的一次显著滑坡而恶化。后者在2022年11月26日影响整个岛屿的一场暴雨后重新启动,并使用差分差分技术进行了分析。它提供了对活动体积的估计,并显示了侵蚀和沉积区域是如何分布的,以及波浪作用是如何改变的。这项研究的见解对于制定缓解战略和保护措施,以保护周围环境,确保居民和游客在这种多灾害环境中的安全,具有重要价值。
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来源期刊
Geosciences (Switzerland)
Geosciences (Switzerland) Earth and Planetary Sciences-Earth and Planetary Sciences (all)
CiteScore
5.30
自引率
7.40%
发文量
395
审稿时长
11 weeks
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