Dynamics of Accumulative Coast under the Influence of Transverse Hydraulic Structure

Yu. N. Goryachkin, D. I. Lazorenko✉, V. V. Fomin

Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation

✉ e-mail: d.lazorenko.dntmm@gmail.com

Abstract

Purpose. The study is purposed at determining modern dynamics of the Lake Sasyk bay-bar (Crimean Peninsula) and the impact of the local seawater intake upon the coastal zone based on long-term in situ observations, satellite data and mathematical modeling. The study was conducted in view of the proposed construction of transverse hydraulic structures.

Methods and Results. Regular (2007–2014) and occasional in situ observations of the coastline dynamics at the Lake Sasyk bay-bar were used. The maximum inter-annual oscillations in the coastline locations are shown to be 5.8 m in the sections to the southeast from the transverse structure (seawater intake) and 3.4–7.2 m – in the sections to the northwest. Seasonal variability is significantly higher: the maximum range is 14.6 m in the sections to the southeast, and in those to the northwest – 26.7 m. The wave climate was investigated. The wave reanalysis data for 1979–2022 have shown that the southwestern direction of waves approaching the coast with a frequency exceeding 30% is most probable. The highest waves also come from this direction. The extreme values of wave characteristics which can occur once in n years were obtained. The mean long-term values of storm numbers in the area under study are given depending on their duration. Application of the GenCade integrated lithodynamic model permitted to obtain the estimates of changes in the coastline position in this area on the interannual scales.

Conclusions. The model calculations made it possible to reproduce the main features and trends in changes of the beach width in the area of the structure obtained due to in situ observations. The mean annual sediment flows in the area under study are directed clockwise (to the southeast) that is conditioned by the coastline orientation and the wave climate features. Difference between the mean annual sediment rates at the area boundaries is negligible – less than 4% of the multi-year average. This fact indicates insignificant impact of the structure upon the sediment total transfer to the southeast.

Keywords

Black Sea, Lake Sasyk, bay-bar, water intake, lithodynamics, mathematical modeling, wave climate, GenCade

Acknowledgements

The study was carried out within the framework of the theme of state assignment of FSBSI FRC MHI FNNN 2024-0016.

Original russian text

Original Russian Text © Yu. N. Goryachkin, D. I. Lazorenko, V. V. Fomin, 2024, published in MORSKOY GIDROFIZICHESKIY ZHURNAL, Vol. 40, Iss. 4, pp. 534–555 (2024)

For citation

Goryachkin, Yu.N., Lazorenko, D.I. and Fomin, V.V., 2024. Dynamics of Accumulative Coast under the Influence of Transverse Hydraulic Structure. Physical Oceanography, 31(4), pp. 486-506.

References

  1. Fomin, V.V. and Goryachkin, Yu.N., 2022. Accounting for the Local Wave and Morphodynamic Processes in Coastal Hydraulic Engineering. Physical Oceanography, 29(3), pp. 271-290. https://doi.org/10.22449/1573-160X-2022-3-271-290
  2. Shuisky, Yu.D., 2005. Basical Peculiarities of Morphology and Dynamic of the Western Crimea Peninsula Coast. In: MHI, 2005. Ecological Safety of Coastal and Shelf Zones and Comprehensive Use of Shelf Resources. Sevastopol: ECOSI-Gidrofizika. Iss. 13, pp. 62-72 (in Russian).
  3. Shuyskiy, Yu.D. and Karasyev, L.M., 1983. Eol Processes on Coastal Accumulative Forms in the West Crimea. Izvestiya VGO, 115(6), pp. 503-508 (in Russian).
  4. Vykhovanets, G.V., 2003. [Aeolian Process on the Sea Shore]. Odessa: Astroprint, 368 p. (in Russian).
  5. Goryachkin, Yu.N. and Dolotov, V.V., 2019. Sea Coasts of Crimea. Sevastopol: Kolorit Co. Ltd., 256 p. (in Russian).
  6. Subetto, D.A., Sapelko, T.V., Stolba, V.F., Kuznetsov, D.D., Ludikova, A.V. and Neustrueva, I.Yu., 2023. Paleolimnology of Lakes of Western Crimea. Doklady Earth Sciences, 510(1), pp. 329-334. https://doi.org/10.1134/S1028334X23600184
  7. Udovik, V.F. and Goryachkin, Yu.N., 2013. Interannual Variability of Alongshore Sediment Flux in the Coastal Zone of Western Crimea. In: MHI, 2013. Ecological Safety of Coastal and Shelf Zones and Comprehensive Use of Shelf Resources. Sevastopol: MHI. Iss. 27, pp. 363-368 (in Russian).
  8. Divinsky, B.V., Fomin, V.V., Kosyan, R.D. and Ratner, Yu.D., 2020. Extreme Wind Waves in the Black Sea. Oceanologia, 62(1), pp. 23-30. https://doi.org/10.1016/j.oceano.2019.06.003
  9. Amarouche, K. and Akpınar, A., 2021. Increasing Trend on Storm Wave Intensity in the Western Mediterranean. Climate, 9(1), 11. https://doi.org/10.3390/cli9010011
  10. Leont’yev, I.O. and Akivis, T.M., 2020. The Effect of a Groin Field on a Sandy Beach. Oceanology, 60(3), pp. 412-420. https://doi.org/10.1134/S0001437020030042
  11. Lazorenko, D.I., Kharitonova, L.V. and Fomin, V.V., 2016. Calculation of Changes Beach Shoreline Yevpatoriya Coast under the Influence Wind Waves. Ecological Safety of Coastal and Shelf Zones of Sea, (1), pp. 31-38 (in Russian).
  12. Gurov, K.I., Udovik, V.F. and Fomin, V.V., 2019. Modeling of the Coastal Zone Relief and Granulometric Composition Changes of Sediments in the Region of the Bogaily Lake Bay-Bar (the Western Crimea) during Storm. Physical Oceanography, 26(2), pp. 170-180. https://doi.org/10.22449/1573-160X-2019-2-170-180

Download the article (PDF)