Abstract
We propose to evaluate the level of eutrophication of surface water in the middle reaches of the river Belaya in the vicinity of the town of Sterlitamak using "eutrophication factor", as the main indicator used by the average length of seedling cress in undiluted samples. We selected a few water samples in eight gauges above, below and within the city. We consider the seasonal dynamics of the level of eutrophication of the variability in different years (2011-2016). Statistical analysis of the data revealed positive and negative dependence. Studies show high nutrient content in this water body. Thus, our proposed method can be used to determine the level of eutrophication of different water bodies.
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