WAVE FORCE AT THE PORT OF YOKOHAMA DUE TO TYPHOON FAXAI IN 2019

Abstract

 Typhoon Faxai in 2019 made landfall in the Kanto region with one of the strongest forces in recorded history. The post-event survey reported a characteristic damage situation. It reported that the severe damage was limited to the area around the port of Yokohama despite the fact that strong winds blew over the entire bay. In this study, we focused on the cause of the coastal damage concentrated in Yokohama Port and the generation mechanism of the external wave force that caused it. It is shown that swell from outside the bay tends to concentrate in the area around Yokohama Port. In addition, when the typhoon hit the area, the swell developed due to strong winds. The wave statistics using wave height and wavelength can clearly characterize the external force of waves off Yokohama Port.