The study of natural processes in the formation of chemical composition of surface waters, in order to assess the critical anthropogenic loads and sustainability of aquatic ecosystems of the boreal ecoregion of western Siberia

About the authors:

Vitaliy y. Khoroshavin, Cand. Geog. Sci., Head of Department of Physical Geography and  Ecology,  Institute  of  Mathematics,  Natural  Sciences  and  Information  Technologies,  Tyumen State University
Maria G. Efimenko, Scientific Researcher, Department of Physical Geography and Ecology, Institute of Earth Sciences, Tyumen State University

Abstract:

Through the field research, chemical analysis and analysis of report documentation of planning and surveying organizations, and processing more than 130 water samples we found the average (median) values of the main hydrochemical parameters, the level of heavy metals (trace elements) for water bodies that at the moment do not have a direct anthropogenic impact. On the basis of adjacent data analysis on the chemical composition of surface waters of the boreal ecoregion in Purovsky District of Yamalo-Nenets Autonomous Okrug, the climatic peculiarities of the territory and landscape-hydrological, landscapegeochemical conditions we identified the main factors that determine the natural chemical composition of the waters of rivers and lakes in the investigated territory. Using methods of statistical data processing, in particular, factor analysis, we determined the contribution of each of the natural factors in addition to the chemical composition of surface waters of the territory described and peculiarities of the process of forcing water quality under the influence of each factor. For a more complete ranking of factors we established sources of water supply of lakes and rivers in the studied territory by means of splitting the hydrograph of the well-studied (from the hydrological point of view) Pur river. Conclusions are made about the leading role of geochemical characteristics of soils in the formation of chemical composition of surface waters of the boreal ecoregion of West Siberia.

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