Features of the water structure in the mouth sections of the Crimean rivers Belbek and Kacha in low water

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  • Authors: P. D. Lomakin1, A. I. Chepyzhenko1, M. A. Popov2
  • Affiliations:
    1. Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation
    2. A. O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Sevastopol, Russian Federation
  • Issue: Vol. 10 No. 3 (2025)
  • Section: Problems of aquatic ecosystems pollution and marine radiochemoecology
  • Pages: 82–89
  • Keywords: temperature, salinity, total suspended matter, dissolved organic matter, marginal filter, Crimea
  • DOI: 10.21072/eco.2025.10.3.08
  • UDC: 556.1(282.247.342/.343.05)
  • Published: 2025-11-21
  • Views: 0 Downloads: 0
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Lomakin P. D., Chepyzhenko A. I., Popov M. A. Features of the water structure in the mouth sections of the Crimean rivers Belbek and Kacha in low water. Biodiversity and Sustainable Development, 2025, vol. 10, no. 3, pp. 82-89. https://doi.org/10.21072/eco.2025.10.3.08

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Abstract

Based on the data from two expeditions conducted by the Marine Hydrophysical Institute in 2019 and 2020, the structural features of the temperature, salinity, total suspended matter and colored dissolved organic matter concentration fields in the estuary areas of the Crimean Belbek and Kacha rivers during low water are analyzed. It is shown that the structure of the thermohaline field was typical for the warm half-year and did not contain any signs of anthropogenic load. In the salinity field at the mouths of the rivers under study, slightly desalinated runoff lenses were found. In the fields of concentration of total suspended matter and concentration of colored dissolved organic matter, a significant anthropogenic component is revealed, determined by the influence of wastewater from the village of Lyubimovka and the flow of the studied rivers. In the estuary area of both rivers, approximately 200 m wide and 2–5 m deep, which can be considered a component of the natural marginal filter, a frontal distribution of the concentration of total suspended matter and the concentration of colored dissolved organic matter is observed. Approximately 50 % of the total suspended matter settled in this barrier zone, and about 20 % of the colored dissolved organic matter was retained from the content of these substances in the immediate vicinity of the mouths of the Belbek and Kacha rivers.

Keywords: temperature, salinity, total suspended matter, dissolved organic matter, marginal filter, Crimea

Authors

P. D. Lomakin

D. Sc., professor, lead researcher

Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation
A. I. Chepyzhenko

PhD, senior researcher

Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation
M. A. Popov

PhD, senior researcher

A. O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Sevastopol, Russian Federation

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Funding

Работа выполнена в рамках государственного задания ФИЦ МГИ по темам FNNN-2024-0016 «Исследование пространственно-временной изменчивости океанологических процессов в береговой, прибрежной и шельфовой зонах Черного моря под воздействием природных и антропогенных факторов на основе контактных измерений и математического моделирования» и FNNN-2024-0012 «Анализ, диагноз и оперативный прогноз состояния гидрофизических и гидрохимических полей морских акваторий на основе математического моделирования с использованием данных дистанционных и контактных методов измерений», а также в рамках государственного задания ФИЦ ИнБЮМ по теме «Комплексное исследование механизмов функционирования морских биотехнологических комплексов с целью получения биологически активных веществ из гидробионтов» (2024–2026 гг.), регистрационный номер 124022400152-1.

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