The variability of the suspended sediment concentration in the surface layer in the Mezen Bay and the Mezen and Kuloy estuaries

Nikolay A. Demidenko

doi:10.1117/12.2691498

17 October 2023 The variability of the suspended sediment concentration in the surface layer in the Mezen Bay and the Mezen and Kuloy estuaries

Nikolay A. Demidenko

Author Affiliations +

Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 127804C (2023) https://doi.org/10.1117/12.2691498
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation

Abstract

The hydrological and geomorphological processes occurring in the Mezen Bay and the estuaries of Mezen and Kuloy are completely subject to the effects of the tidal wave. A high concentration of suspended sediments in comparison with the adjacent areas of the river and sea is observed in areas of reversible currents. The maximum value of spring tides in the estuaries of Mezen and Kuloy reaches 10 m, in the neap tides – 4.8 m. Turbidity of water in the surface layer varies within 0.1–1.5 kg/m³. The increase in turbidity is facilitated by wind wave on the offshore and intense abrasion of the banks in the estuaries. The processes of resuspension and transport of sediments in estuaries are manifested at different time scales, since there is a wide range of periodicity of the magnitude of the energy flux depending on the source and the reaction of sediments to the applied forces. The range of periods of flow velocity fluctuations and suspended sediment concentration in estuaries is quite wide: from fractions of a second to several years. The maximum and minimum periods of fluctuations in velocity and their energy differ by about 10⁸÷10¹⁰ times. The study of the hydrological regime was carried out within the Shirshov Institute of Oceanology № FMWE-2021-0006 and with the support of the Ministry of Education and Science of the Russian Federation (project No. 075-15-2021-934, UNU TU-134 "Optic").

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Nikolay A. Demidenko "The variability of the suspended sediment concentration in the surface layer in the Mezen Bay and the Mezen and Kuloy estuaries", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 127804C (17 October 2023); https://doi.org/10.1117/12.2691498

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