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Assessment of Water Quality and Ecological Condition of the Oster River

Abstract

Significant, multilateral, and long-term use of Ukraine’s water resources in various spheres of human activity has led to the deterioration of the state of many water management facilities and the complication of their operational regime. An unfavorable ecological situation developed in 2016 around the Oster River flowing through the territory of the Chernihiv region. This was caused by many factors of anthropogenic impact (intentional and unintentional) that have formed in the agricultural, industrial, housing, and communal sectors. A combination of these factors resulted in some changes occurring in the river ecosystem. The main goal of the present work is an analytical study of water quality in terms of hydrochemical indicators and an assessment of the ecological state of waters of the Oster River. The chemical composition of the surface waters of the city of Oster was analyzed, in particular, by stripping voltammetry for the concentration of heavy metal ions Pb2+, Cu2+, Zn2+, and Cu2+ and colorimetry for the concentration of total Mn2+, \({\text{NH}}_{4}^{ + }\), \({\text{NO}}_{3}^{ - }\), and \({\text{PO}}_{4}^{{3 - }}\). Insignificant excesses of the water quality standard were found for fishery reservoirs in the concentration of organic substances in terms of chemical and biological oxygen consumption, ammonium ions, and phosphate ions. Pollution with ions of these heavy metals in water samples was not recorded, but the concentrations of lead and copper ions tend to increase. Exceeding the total iron and manganese indicators is typical for the Polesye rivers. These phenomena may result from anthropogenic loads and natural anomalies. A comprehensive assessment of the quality of surface waters based on the calculation of the water pollution index revealed that in 2018–2020, surface waters of the Oster River belong to Class III and are characterized as “moderately polluted.” The study results are useful for areas of water protection activities to improve the state of the Oster River and eliminate the negative consequences of anthropogenic impact.

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Correspondence to O. Yu. Kupchyk.

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Translated by O. Zhukova

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Kupchyk, O.Y., Derii, Z.V. Assessment of Water Quality and Ecological Condition of the Oster River. J. Water Chem. Technol. 44, 139–144 (2022). https://doi.org/10.3103/S1063455X22020072

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  • DOI: https://doi.org/10.3103/S1063455X22020072

Keywords:

  • anthropogenic pollution
  • heavy metals
  • hydrochemical parameters
  • water pollution index
  • surface waters
  • Oster River