Mathematical simulation of the Ay-Todor bay wave regime

https://doi.org/10.35595/2414-9179-2021-3-27-16-31

View or download the article (Rus)

About the Authors

Lyudmila V. Kharitonova

Marine Hydrophysical Institute of RAS,
2 Kapitanskaya str., Sevastopol, 299011, Russian Federation;
E-mail: l.kharitonova@mhi-ras.ru

Dmitrii V. Alekseev

Marine Hydrophysical Institute of RAS,
2 Kapitanskaya str., Sevastopol, 299011, Russian Federation;
E-mail: d.alekseev@mhi-ras.ru

Vladimir V. Fomin

Marine Hydrophysical Institute of RAS,
2 Kapitanskaya str., Sevastopol, 299011, Russian Federation;
E-mail: v.fomin@ukr.net

Abstract

Investigation of wave regime of coastal water areas is practically important for safe shipping, constructing and using of coastal infrastructure objects. At the present paper statistical characteristics and space distribution of parameters of wind waves in the Ay-Todor Bay region placed on the Crimea South Coast of the Black Sea are obtained on the basis of mathematical simulation. Analysis of the wind wave parameters for the year diapason of 1979–2017 has shown that waves running from the east and having 0.5 m heights and 3.0–3.5 s mean periods are the most repeatable. The most durable storms are formed by waves coming from East–South-South-West sector in the period from December to January. The multiannual calm duration is equal to ~11 days. Estimation of extremal characteristics (height, period and length) of wind waves of different probability, which possible one time in a year, 5, 10, 25, 50 and 100 years are made. For the storm probable one time in 25 years the mean wave height near the boundary of the Ay-Todor Bay is equal to 4.5 m. For this storm the wave height of 1% probability reaches 9.6 m. For the directions of winds of 4 % regime probability which causes the most dangerous waves calculations of wave characteristics with high space resolution (~1.5 m) are carried out by using of SWAN model and nested grid technology. Fields of significant wave height, mean wave length, bottom wave orbital velocities and space distribution of wave breaking zones are analyzed. It is found that most intensive waves are generated by wind having south-east, east and south directions. Maximal bottom orbital velocities of wave current reaches of 2.5–3.5 m/s and occurs along the coast till 10 m depth. Model calculation of wave currents by using of SWASH model allowed obtained presence in the coastal zone near beach of local cyclonic eddy, which transport suspended sediments along its south edge from beach towards the sea.

Keywords

wind wave and current, mathematical simulation, statistical characteristics, the Ay-Todor Bay of Crimea, the Black Sea, SWAN, SWASH.

References

  1. Booij N., Ris R.C., Holthuijsen L.H., A third-generation wave model for coastal regions. Model description and validation. Journal of Geophysical Research, 1999. V. 104 (4). P. 7649–7666. https://doi.org/10.1029/98JC02622.
  2. Divinskii B., Fomin V., Kosyan R. and Lazorenko D., 2019. Maximum Waves in the Black Sea. In: MEDCOAST Foundation, 2019. Proceedings of the Fourteenth International MEDCOAST Congress on Coastal and Marine Sciences, Engineering, Management and Conservation MEDCOAST 2019 (Marmaris, Turkey, 22–26 October 2019). Mugla, 2019. Turkey: MEDCOAST Foundation. V. 2. P. 799–810.
  3. Divinsky B.V. and Kosyan R.D., 2018. Wave Climate of the Coastal Zone of the Crimean Peninsula. Physical Oceanography, [e-journal]. V. 25 (2). P. 93–101. DOI: 10.22449/1573-160X-2018-2-93-101.
  4. Divinsky B.V., Fomin V.V., Kosyan R.D. and Ratner Y.D., 2020. Extreme Wind Waves in the Black Sea. Oceanologia, 62 (1). P. 23–30. https://doi.org/10.1016/j.oceano.2019.06.003.
  5. Efimov V.V., Komarovskaya O.I. Atlas of extreme wind waves of the Black Sea. Sevastopol: MGI NASU. 2009. 59 p. (in Russian).
  6. Goryashkin Yu.N. and Repetin L.N. Storm Wind and Wave Regime Near the Black Sea Coast of Crimea. In: MHI, 2009. Ecological Safety of Coastal and Shelf Zones and Comprehensive Use of Shelf Resources. Sevastopol: MHI, 2009. Iss. 19. P. 56–69 (in Russian).
  7. Krylov Yu.M. Spectral Methods for Investigation and Calculation of Wind Waves. Leningrad: Gidrometeoizdat, 1966. 258 p. (in Russian).
  8. Lopatoukhin L.J., Rozhkov V.A., Ryabinin V.E., Swail V.R, Boukhanovsky A.V., Degtyarev A.B. Estimation of extreme wind wave heights. World Meteorological Organisa-tion. JCOMM Technical Report WMO/TD. No. 1041. 2000.
  9. Polonsky A.B., Fomin V.V. and Garmashov A.V. Characteristics of Wind Waves of the Black Sea. Reports of the National Academy of Sciences of Ukraine, (8). 2011. P. 108–112.
  10. Repetin L.N., Belokopytov V.N., Lipchenko M.M. Winds and waves in the coastal zone of the southwestern part of Crimea. Environmental safety of coastal and shelf zones and integrated use of shelf resources. Sevastopol: ECOSI-Hydrophysics, 2003. Issue 9. P. 13–28 (in Russian).
  11. Zenkovich V.P. Shores of the Black and Azov seas. Moscow, Geografgiz: 1958. 374 p. (in Russian).

For citation: Kharitonova L.V., Alekseev D.V., Fomin V.V. Mathematical simulation of the Ay-Todor bay wave regime InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: MSU, Faculty of Geography, 2021. V. 27. Part 3. P. 16–31. DOI: 10.35595/2414-9179-2021-3-27-16-31 (In Russian)