This study aimed to research the morphological changes around the coastline adjacent to the Hsinchu Fishery Port, one of the 13 hot spots of massive morphological changes in Taiwan announced by the Ministry of the Interior, Taiwan. The trend of coastal change could be understood via the sediment transport analysis from field topographic surveys; however, the range of the affected area in question was unclear because of the lack of the topographic survey data. To compensate the drawback, we employed a numerical model such as MIKE 21, which can simulate the circumstances concerning whether there is a coastal structure or an estuarine sediment. All the possible scenarios thereof have been compared and discussed. The range of the area under impact was identified extending for 4.8km from the north of the Hsinchu Fishery Port and for 7.3 km from the south of the port, 12.1 km in total.
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