Wind Wave Regime in the Area of Balaklava Bay

V. V. Fomin, A. A. Polozok*

Marine Hydrophysical Institute of RAS, Sevastopol, Russia

* e-mail: polozok.umi@gmail.com

Abstract

The wave regime of coastal waters is of great practical importance for the safety of navigation, design and operation of coastal infrastructure facilities. In this work the regime characteristics of wind waves in the area of Balaklava Bay (Crimea Peninsula) are studied on the basis of mathematical modeling. As the initial data we used the results of retrospective calculations of wind waves in the Black Sea for the period 1979–2019 with a discreteness of 1 hour, obtained using the spectral wave model SWAN on an unstructured mesh. The wind impact was determined using data from the atmospheric reanalyses of ERA-Interim and ERA5. Based on statistical processing of simulation results for the Balaklava Bay area, information was obtained on the frequency of wave elements, the duration of storm and calm situations and the extreme characteristics of waves. It was found that in most cases the significant wave height hs in the study area does not exceed 0.5 m, and the frequency of waves of height hs ≥ 2.5 m is ~ 1%. The wave of the south-west and south-south-west directions has the maximum frequency and intensity. For storms that are possible 1 time in 25 years the value hs exceeds 7 m. The longest storm situations occur in December – January. The minimum duration of storms is observed in August. During the 41-year period there was no statistically significant trend in changes wave heights, although there is a tendency to decrease the waves intensity (for 10 years the average annual values hs decrease by 3 cm).

Keywords

Black Sea, Balaklava Bay, wind waves, mathematical modeling, SWAN, statistical characteristics

Acknowledgments

The Balaklava Bay wave regime was studied under topic No. 0827-2018-0004 of the Marine Hydrophysical Institute of RAS. Mathematical modelling of the Black Sea wave climate for 1979–2019 was performed under project No. 18-05-80035 and funded by the Russian Foundation for Basic Research.

For citation

Fomin, V.V. and Polozok, A.A., 2020. Wind Wave Regime in the Area of Balaklava Bay. Ecological Safety of Coastal and Shelf Zones of Sea, (2), pp. 53–67. doi:10.22449/2413-5577-2020-1-53-67 (in Russian).

DOI

10.22449/2413-5577-2020-1-53-67

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