Change in ecological water quality of West Dvina River under the impact of urban waste water
https://doi.org/10.29235/1029-8940-2021-66-1-135-146
Abstract
In determining the quality of surface waters and, first of all, rivers, along with physical and chemical pollution, the analysis of the hydrobiological component of river ecosystems is becoming increasingly important. The aim of the work was to assess the ecological quality of the river ecosystems from the impact of wastewater discharge from the cities of Vitebsk, Polotsk and Novopolotsk on the Western Dvina River based on the macrozoobenthos community. The studied river sections are inhabited by rare for Belarus and protected in Europe species of aquatic organisms. A relatively high abundance (from 30 to 80 %) of the group of rheophilic species Plecoptera, Ephemeroptera, and Trichoptera was noted, which represent the three highest priority indicator groups of aquatic organisms. Biotic indices and the water purity class of the r. Western Dvina were determined. In accordance with the EU Water Framework Directive, the water purity class at the studied stations has a good and high value. It is concluded that the negative impact of wastewater from the cities of Vitebsk, Polotsk and Novopolotsk has a very local significance and weakly affects the biota and the ecological quality of the water of the Western Dvina River already at a distance of 18 km. below the discharge of water from the treatment facilities of the Novopolotsk refinery.
About the Authors
V. M. Baitchorov
Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources
Belarus
Belarus
Vladimir M. Baitchorov, D. Sc. (Biol.), Head of the Sector
27, Akademicheskaya Str., 220072, Minsk
Y. G. Giginyak
Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources
Belarus
Belarus
Yuri G. Giginyak, Ph. D. (Biol.), Leading Researcher
27, Akademicheskaya Str., 220072, Minsk
M. D. Moroz
Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources
Belarus
Belarus
Michael D. Moroz, Ph. D. (Biol.), Leading Researcher
27, Akademicheskaya Str., 220072, Minsk
I. J. Giginyak
Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources
Belarus
Belarus
Irina J. Giginyak, Ph. D. (Biol.), Leading Researcher
27, Akademicheskaya Str., 220072, Minsk
E. V. Korzun
Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources
Belarus
Belarus
Egor V. Korzun, Senior Researcher
27, Akademicheskaya Str., 220072, Minsk
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