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Directional Extreme Value Models in Wave Energy Applications
Open AccessArticle

Offshore-to-Nearshore Transformation of Wave Conditions and Directional Extremes with Application to Port Resonances in the Bay of Sitia-Crete

1
School of Naval Architecture & Marine Engineering, National Technical University of Athens, 15773 Zografos, Athens, Greece
2
Institute of Oceanography, Hellenic Centre for Marine Research, 19013 Anavyssos, Greece
3
Department of Naval Architecture, School of Engineering, University of West Attica, 12243 Egaleo, Greece
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(3), 280; https://doi.org/10.3390/atmos11030280
Received: 16 January 2020 / Revised: 27 February 2020 / Accepted: 10 March 2020 / Published: 12 March 2020
(This article belongs to the Special Issue Waves and Wave Climate Analysis and Modeling)
For coastal engineering studies and the efficient design of ports and harbors, reliable information concerning wave conditions in nearshore and coastal sites is needed. In the absence of long-term wave data at the site of interest, this becomes possible by using offshore data, which are usually available in the nearby geographical area, in addition to bathymetric and coastline information concerning the nearshore area and the local site. The latter are used in conjunction with a suitable wave model, which calculates the offshore-to-nearshore transformation of wave conditions and incorporates the relevant shallow-water phenomena. In the present work, the above methodology is applied to calculate the nearshore wave conditions in the Bay of Sitia, Crete, by applying the Simulating WAves Nearshore (SWAN) model. The interesting feature of the Bay of Sitia is its vulnerability due to strong erosion, which downgrades the touristic value of the beach. Furthermore, nearshore wave data offer valuable information concerning further coastal and port engineering studies. In this context, results from directional extreme value analysis of the nearshore wave conditions in the Sitia Bay are derived and used to investigate resonances in the enclosed marina of the Sitia port, by taking into account the depth variations inside the basin. To this end, a novel method was developed based on the modified mild-slope equation, in conjunction with the Finite Element Model, for the solution of the nonlinear eigenvalue problem. View Full-Text
Keywords: offshore-to-nearshore wave transformation; nearshore wave climate; directional extreme wave data; port resonances offshore-to-nearshore wave transformation; nearshore wave climate; directional extreme wave data; port resonances
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Karathanasi, F.; Karperaki, A.; Gerostathis, T.; Belibassakis, K. Offshore-to-Nearshore Transformation of Wave Conditions and Directional Extremes with Application to Port Resonances in the Bay of Sitia-Crete. Atmosphere 2020, 11, 280.

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