Dynamics of Nutrients Concentration in the Chernaya River Waters (Crimean Peninsula) in 2015–2020

M. A. Myslina✉, A. V. Varenik, D. V. Tarasevich

Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation

✉ e-mail: myslina@mhi-ras.ru

Abstract

Purpose. The study is purposed at assessing the intra- and inter-annual dynamics of nutrients concentration (compounds of inorganic nitrogen, phosphorus and silicon) in the Chernaya River waters.

Methods and Results. The quarterly monitoring data on the water hydrochemical characteristics in the lower reaches of the Chernaya River and in the Chernorechenskoe reservoir obtained by Marine Hydrophysical Institute of RAS in 2015–2020 were used. The data obtained made it possible to study the distribution of inorganic nitrogen, phosphorus and silicon compound concentrations in the Chernaya River waters during the period under study, as well as its seasonal and interannual changes. As compared to 2010–2014, the ammonia nitrogen levels in 2015–2020 increased on average by 2.7 times. The mean long-term inorganic nitrogen outflow with the Chernaya River waters was 32.46 t/year in 2010–2014 and 27.8 t/year in 2015–2020, phosphorus and silicon – 0.23 and 57.93 t/year in 2010–2014 and 0.18 and 62.21 t/year in 2015–2020, respectively.

Conclusions. An increase in concentrations of all the nutrients under consideration was observed at the stations located near the villages in the Baydar Valley and hence, most susceptible to the anthropogenic impact, as well as in the area of water outlet of the Sevagrosoyuz agricultural firm, that can testify to the inflow of mineral fertilizers to the river waters. Recently the content of nutrients inorganic forms in the Chernaya River waters has increased as compared to the period before 2014, indicating the discussed over the past decade necessity in constructing a sewerage and wastewater treatment system both for the enterprises and the residential development of the Baydar Valley.

Keywords

Chernaya River, Crimean Peninsula, nutrients, inorganic nitrogen, phosphorus, silicon, anthropogenic pressure

Acknowledgements

The study was carried out within the framework of state assignment of FSBSI FRC MHI on theme FNNN 2024-0001 “Fundamental studies of the processes determining the flows of matter and energy in marine environment and at its boundaries, the state and evolution of physical and biogeochemical structure of marine systems in modern conditions”.

Original russian text

Original Russian Text © M. A. Myslina, A. V. Varenik, D. V. Tarasevich, 2024, published in MORSKOY GIDROFIZICHESKIY ZHURNAL, Vol. 40, Iss. 3, pp. 438–449 (2024)

For citation

Myslina, M.A., Varenik, A.V. and Tarasevich, D.V., 2024. Dynamics of Nutrients Concentration in the Chernaya River Waters (Crimean Peninsula) in 2015–2020. Physical Oceanography, 31(3), pp. 398-408.

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