Hydrochemical and hydrobiological investigations of the Upper Angara R. and of its tributaries

Authors

  • Tomberg I.V. 1 ID
  • Stepanova O.G. 1 ID
  • Vorobyova S.S. 1 ID
  • Suslova M.Yu. 1 ID
    • 1 Limnological Institute of the RAS Siberian Branch, 3, Ulan-Batorskaya st., Irkutsk, 664033, Russia

DOI:

https://doi.org/10.31951/2658-3518-2025-A-4-919

Keywords:

Upper Angara R. and tributaries, ion composition, biogenic elements, trace elements, phytoplankton, sanitary-indicatory microorganisms

Abstract

We have presented the results of hydrochemical and hydrobiological investigations performed in the Upper Angara R. basin and at North Baikal tributaries. A 4-fold increase of mineralization in the Upper Angara R. water from sources to inflow was found out due to income of tributaries waters with a high mineralization. Compared to previous investigations, we registered enrichment of waters in the investigated water flows with trace elements. Increase of normative by copper, molybdenum, iron and manganese was registered in water of some rivers. Determination of microorganisms sanitary groups showed a trend to improvement of riverine waters quality.

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Published

2025-08-31

Issue

2025: №4 (SI:8VBC)

Section

Articles

License

Copyright (c) 2025 Limnology and Freshwater Biology

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License
This work is distributed under the Creative Commons Attribution-NonCommercial 4.0 International License.