Nan

This study calculates the downtime of different schedules for the sea area where the new project in the Taichung Port reclamation area is located and simulates the phenomenon of strong wind and sudden siltation that may occur during the construction. In addition, the stability of the caisson temporary storage area and the work area on the south of the Taichung Harbor channel was also assessed to ensure safety during the construction.The open sea wave conditions are calculated by the wind field in the western Pacific field, and then the open sea wave conditions are advanced to the local model of the Taichung Port to calculate the wave distribution in the entire Taichung Port. Finally, the wave height time series of each feature point in the sea area is calculated through the conversion matrix, and the time statistics are carried out according to the wave standard, and the statistical results of different construction operation stages, each month, and winter and summer are obtained.At each construction stage, among which stage 0, the topography of the sea area changes significantly. The slope terrain on the southwest side of the location where the caissons are scheduled to be deployed in Phase 0 can be significantly silted up to more than 3 meters within three days. When the wind and wave conditions are more severe, the same situation occurs on the north side of the location where the caissons are scheduled to be deployed. After the first stage of construction, the scheduled location of the caissons and the amount of erosion near the newly built seawall are relatively moderate, and the terrain change in the short-term 3-day simulation is less than 1m.When the open sea waves approach the exit of the caisson work area, there is no wave height exceeding 0.1m inside the work area, which means the calmness of the work area is very good.