Abstract
In Nagoya Port, large ships navigating in the main channel generate significant ship waves, which cause unexpected ship motions of berthing ships. Rollover accident of a small ship due to ship waves happened in the past, so that safety measures against the ship waves have been investigated.
In this study, findings contributing to future safety measures are summarized according to field observation data on wave agitation in the channel and numerical simulation on ship waves. Ship waves affectted by natural conditions in the navigation channel are summarized, as well.
As a result, the relationship between wave heights of ship waves and ship speed is identified, in which ship waves depend predominantly on the ship type and the navigation condition of entering and outgoing the port. By applying the relationship, estimated formulas on wave height of each ship conditions are proposed. In the course of the study, it is confirmed that the propagating ship waves are affected by tide level and bathymetry, which create remarkably amplified point of wave height appearing in different area. The constant direction current due to Kiso River out flow is confirmed to affect also ship waves, in which ship waves generated by entering and outgoing ships are different in wave height.
