The barotropic simulation of coastal current in Soc Trang derived from a hydraulic model in curvilinear coordinates

Tóm tắt

The coastal current plays a vital role in the transportation of sediment near the shoreline, significantly impacting the distribution of sediment grain sizes and shoreline transformations. This study focuses on examining the near-shore coastal current along the Soc Trang Province coast in Vietnam, considering the combined influences of waves, winds, and tides by utilizing a model in curvilinear coordinate system. Rigorous calibration and validation of the model are conducted using data obtained from measurement stations, revealing a consistent correlation between the observed data and simulated results. The direction of the coastal current, governed by the interplay of waves and winds, exhibits variation according to the monsoon season. During the northeast monsoon, the flow velocity is notably influenced, surpassing the impact of the southwest monsoon. In the northeast monsoon season, the tidal currents from the northeast to southwest align with the wave-induced current, resulting in an amplified coastal current during both spring tide (3-5%) and neap tide (2-5%). Conversely, in the southwest monsoon season, the tidal currents and wave-induced current move in opposing directions, leading to a reduction in coastal current velocities during high tide (3-4%) and low tide (3-4.5%). On the other hand, the impact of wind-induced current is negligible due to the small and low-lying nature of these areas, thereby minimizing the influence of wind on the overall flow dynamics.