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<p>Mediterranean coasts are suffering of major changes due to natural processes such as climate change, sea currents and swells; as well as anthropogenic activities such as building construction on beach dunes and dams. The Cap Bon Peninsula coasts, northeastern Tunisia, show these morphological changes. During the period 1992–2024, the rates of coastline fluctuations are calculated using the Digital Coastal Analysis System (DSAS) from satellite images. The results show eroded areas, especially along the coasts of Nabeul and Hammamet touristic pole (− 2.07&#xa0;m/year to − 2.11&#xa0;m/year). An X-ray mineralogical and a particle size analysis of surface sediments showed that the beaches are bordered by medium and coarser sand with predominantly quartz compositions (&gt; 98%) and carbonate biogenic depletion. This dynamic is be associated with turbidity changes in marine waters along the shoreline. In order to investigate this relationship, turbidity index maps are created from spatial data over the same period. The most important turbidity indices are mainly situated on the coasts, testifying to a significant contribution of suspended solids from the land. Coastal erosion and sewage plumes are their main sources. These results show that the study area is subject to several processes (hydrodynamic, sedimentary and anthropogenic) that may explain the significant retreat of the coastline and the urgency to take measures to mitigate their effect throughout Tunisian northeast coasts.</p>

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Monitoring of coastal change using remote sensing and geographic information system, natural and anthropogenic impacts, Cap Bon Peninsula Tunisia

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Safa Ktari,
  • Feyda Srarfi,
  • Salah Bouden,
  • Abdelaziz Sbei,
  • Asma Maarouf,
  • Ammar Mlayah

摘要

Mediterranean coasts are suffering of major changes due to natural processes such as climate change, sea currents and swells; as well as anthropogenic activities such as building construction on beach dunes and dams. The Cap Bon Peninsula coasts, northeastern Tunisia, show these morphological changes. During the period 1992–2024, the rates of coastline fluctuations are calculated using the Digital Coastal Analysis System (DSAS) from satellite images. The results show eroded areas, especially along the coasts of Nabeul and Hammamet touristic pole (− 2.07 m/year to − 2.11 m/year). An X-ray mineralogical and a particle size analysis of surface sediments showed that the beaches are bordered by medium and coarser sand with predominantly quartz compositions (> 98%) and carbonate biogenic depletion. This dynamic is be associated with turbidity changes in marine waters along the shoreline. In order to investigate this relationship, turbidity index maps are created from spatial data over the same period. The most important turbidity indices are mainly situated on the coasts, testifying to a significant contribution of suspended solids from the land. Coastal erosion and sewage plumes are their main sources. These results show that the study area is subject to several processes (hydrodynamic, sedimentary and anthropogenic) that may explain the significant retreat of the coastline and the urgency to take measures to mitigate their effect throughout Tunisian northeast coasts.