Study of Changes in Coastal Sediment Transport Patterns after the 2018 Earthquake and Their Implications for Boat Mooring Facilities in Palu Bay
DOI:
https://doi.org/10.52722/antvrd93Keywords:
Sediment Transport, Hydrodynamics, Shoreline Change, Palu Bay, AccretionAbstract
The 2018 earthquake and tsunami in Palu Bay caused significant changes in seabed morphology that potentially affect hydrodynamic conditions and sediment transport processes in the coastal area. This study aims to analyze the changes in sediment transport patterns after the disaster and their implications for coastal conditions and boat mooring facilities along Talise Beach, Palu Bay. The research was conducted using numerical modeling of hydrodynamics and sediment transport to obtain the distribution of current velocity, seabed elevation changes (bed level change), and shoreline changes. The simulation results show that the current velocity in the study area ranges from 0.002 to 0.018 m/s. The variation of bed level change values indicates the occurrence of erosion and sedimentation processes at several observation points. The shoreline change simulation results also indicate the dominance of accretion along Talise Beach, suggesting sediment accumulation in the coastal zone. This condition may contribute positively to shoreline stability but may also cause gradual shoaling in shallow waters around local fishing boat mooring areas. In addition to bathymetric changes caused by the tsunami, sediment transport dynamics in the study area are also influenced by coastal protection structures such as revetments, which modify wave energy distribution and sediment deposition patterns.
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