Original scientific paper

Resonance in Ploče Harbor (Adriatic Sea)

Ivica Vilibić
Hrvoje Mihanović

Abstract

In this paper, we extract and validate high-frequency oscillations in the port of Ploče, based on sea level data from one year (March 2002-March 2003) measured at a tide gauge in the harbor.
Frequency was analyzed by applying stationary (spectral) and non-stationary (wavelet and filtering) analyses of the data to extract temporal characteristics of the fundamental seiches with a period of
30 min. Seiches are pertinent throughout the year, but their maximum amplitude doubles (up to 25 cm) during the summer. Modeling studies showed that seiches are primarily a result of incoming waves from the open sea, generated by resonant coupling with air pressure traveling waves. In contrast, direct wind forcing has a minor influence on seiche generation. Seiches endanger ferries
and small moored boats as well as large cargo ships in harbors where strong currents (greater than 50 cm s-1) appear during extreme events.

Keywords

harbor resonance; tide gauge; empirical analysis; numerical models

Hrčak ID:

85

URI

https://hrcak.srce.hr/85

Publication date:

1.12.2005.

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