Verification of Infragravity Waves Generated at Harbor Entrance by Using a Boussinesq Model

摘要

Infragravity waves observed inside a harbor may consist of free wavesnot only propagated from offshore but also generated (released) atharbor entrance due to reduction of wave groups by diffraction andbreaking. In this study, numerical simulations of both wind andinfragravity wave transformations from offshore to harbor inside areconducted by using Boussinesq-type wave transformation models. Incase that the remained free waves are not dominant in the wave field,the infragravity waves generated at harbor entrance can be reproducedin calculation of wave transformation for wind waves with consideringnonlinear wave-wave interaction in their wave groups.