FIELD MEASUREMENTS AND NUMERICAL MODELING OF HARBOR OSCILLATIONS DURING STORM WAVES

W.M. Jeong, J.W. Chae, W.S. Park, K.T. Jung

Abstract


A series of simultaneous field measurements for long and short-period waves under storm and calm wave conditions were made to understand harbor resonances in a partially enclosed harbor. During storm condition the frequency spectra show peaks of considerable magnitude around the wave period of 1 ~ 5 minutes, which are bounded long waves and their harmonics. They are strongly related with storm waves but longer period (free long) waves are not in the harbor. Numerical tests were also carried out by using the hybrid element model including entrance separation losses in a simple rectangular harbor to validate the model for a mostly constricted entrance case. Further the model was used to simulate the long period oscillation in Muko harbor. Comparisons were made between field data and numerical results to discuss the effect of storm waves on the long period oscillations. Tests demonstrate the effect of input parameters on model results and proper choice of them are stressed.

Keywords


field measurement; numerical model; harbor; harbor oscillation; storm waves

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