Geochemical typology of aquatic landscapes of lakes in the Narochansky National Park

  • Boris P. Vlasov Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Nadzeya V. Kavalchyk Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Nina Yu. Sukhovilo Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

Abstract

Geochemical typology and mapping of aquatic landscapes of the Narochansky National Park have been completed. Within the aquatic systems of lakes Naroch, Glublya, Glubelka, elementary geochemical landscapes confined to homogeneous areas of underwater relief with the corresponding type of bottom sediments and plant communities, the distribution of typomorphic chemical elements in waters and silts are identified. On the base of the approaches of A. I. Perelman, N. S. Kasimov, A. D. Khovansky and the classification of aquatic landscapes of small Belarusian lakes of O. F. Yakushko we identified elementary aquatic landscapes of different classification levels. The studied lakes differ in the genesis of the basins, morphometric indicators, and the structure of the catchment areas. Lake Naroch is part of the Naroch lake group, lakes Glublya and Glubelka are part of the Bolduk lake group. The bottom sediments of lakes include sands, bouldered and silted ones, sandy and clayey carbonate silts, clays, carbonate sapropels, siliceous and mixed ones. The structure of the bottom of lake basins determines the mechanical migration of substances. It allows us to distinguish abrasion-accumulative, transaccumulative and accumulative positions. In the littoral and sublittoral zones, higher aquatic vegetation of helophytic, helo-hydrophytic and hydrophytic formations is developed. The waters of the lakes are generally well saturated with oxygen. They are characterised by a hydrocarbonate-calcium composition. These characteristics create specific conditions for the migration and concentration of chemical elements. The result of typing was the identification of 40 types of elementary aquatic landscapes of Lake Naroch, 8 types of elementary aquatic landscapes of Lake Glublya and 15 types of elementary aquatic landscapes of Lake Glubelka. Elementary geochemical landscapes of Lake Naroch are classified as oxygen-hydrocarbonate-calcium class, in the aquatic system of Lake Glubelka, in addition to this class, the oxygen-hydrocarbonate-calcium-gley class of elementary geochemical landscapes is also distinguished, and in Lake Glubelka the oxygen-hydrocarbonate-calcium and оxygen-hydrocarbonate-calcium-sulphurous classes of elementary geochemical landscapes are represented. The compiled maps can be used to create a comprehensive cartographic basis for determining the anthropogenic load on water bodies, predicting changes in the ecological state and vulnerability of aquatic systems.

Author Biographies

Boris P. Vlasov, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

doctor of science (geography), full professor; chief researcher at the laboratory of lakes research, faculty of geography and geoinformatics

Nadzeya V. Kavalchyk, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

PhD (geography), docent; associate professor at the department of soil science and geographic information systems, faculty of geography and geoinformatics

Nina Yu. Sukhovilo, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

PhD (geography); head of the laboratory of lake research, faculty of geography and geoinformatics

References

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Published
2024-06-14
Keywords: elementary geochemical aquatic landscapes, Narochansky National Park, lake system, typomorphic elements, underwater relief, higher aquatic vegetation
How to Cite
Vlasov, B. P., Kavalchyk, N. V., & Sukhovilo, N. Y. (2024). Geochemical typology of aquatic landscapes of lakes in the Narochansky National Park. Journal of the Belarusian State University. Geography and Geology, 1, 113-125. Retrieved from https://journals.bsu.by/index.php/geography/article/view/6047
Issue
No 1 (2024): Journal of the Belarusian State University. Geography and Geology
Section
Geography

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