| dc.description.abstract | This study aims to investigate the impact of Guantang liquefied natural gas (LNG) seaport on hydrodynamic at the coastal area in Taoyuan city. The LNG seaport, which is located at offshore area and connected to land by a trestle bridge, is proposed for the Guantang Industrial Area along the coast in Taoyuan. With the new structure on coastal area, the flow and wave fields in adjacent sea may evolve differently and result in change of sediment transport and nearshore morphology. To understand the impact of LNG seaport on nearshore current and wave fields, this study uses an unstructured-grid numerical 2D model (Delft3D FM) to analyze the change of the flow and wave fields. First, the capabilities of Delft3D FM in simulating the depth-averaged flow and wave fields around coastal area is confirmed via comparing with observed data from ADCP. Thus, we can understand the spatial variability of flow and wave fields around the coastal area with the tide, wind and wave. Then, scenario models, including original case (without LNG seaport) and LNG seaport case in both summer and winter season, are set up to discuss the impact caused by LNG seaport. As for model results, both significant wave height and bed shear stress reduce in the sheltered area of LNG seaport. The trumpet-shaped LNG seaport, which has larger opening at western side, results in the spatial variations of velocity, wave height and bed shear stress. For example, current may accelerate in eastern side since the narrow gaps under trestle bridge, and slowdown in western side due to the wide opening. Beside the spatial variations, during different tidal phases or different seasons, the impact resulted from the asymmetric of LNG seaport also manifests itself in various changes of the flow direction or velocity, wave height and bed shear stress. | en_US |