Author(s): Wang Yanhong; Gao Lu

Linked Author(s):

Keywords: Artificial island; Erosion and deposition evolution; Sandy coast

Abstract: This study aimed to characterize the changes in erosion and deposition along the foreshore of Hongtang Bay before and after the construction of the offshore artificial island. The dynamic sediment environment near Hongtang Bay in Sanya was analyzed, and topography and remote sensing images were compared. The impacts of the artificial island's construction on the erosion and deposition of the sandy coastlines of Hongtang Bay, particularly in the unprotected areas surrounding the island, were investigated using multi-parameter observational data. The results indicated that weak tidal currents and wave action were the primary driving forces behind foreshore erosion and deposition in the project area. Changes in wave fields and sediment transport resulting from the construction of the offshore artificial island were identified as the main factors influencing the evolution of erosion and deposition. The impact of the artificial island on the coastal environment since its inception has primarily been confined to a sheltered area approximately 6 km on either side of the sandy coastline. Erosion and deposition processes are expected to cause the outer edges of certain parts of the artificial island, which are characterized by elevations and structures that do not meet design specifications, to shift to a level parallel to the typical wave crest line.

DOI: https://doi.org/10.64697/HIC2024_P610

Year: 2024