MEDIUM DENSITY OF HEAVY METALS STOCKS IN BOTTOM SEDIMENTS OF SMALL RIVERS THE BASIN OF THE UPPER OB – SAMSONOVSKAYA, THE LEV AND THE VANDRAS
The calculation of the Clark concentrations of heavy metals (Zn, Pb, Ni, Cu, Sr, Cr, Mn) detected atomic emission analysis in the bottom sediments of small rivers in the basin of the Upper Ob – Samsonovskaya, Lev, Vandras showed exceeding Clark on lead by 2–5 times. On the basis of previously established equations of the second degree polynomial describing the spatial distribution of heavy metals in the long section of the rivers Samsonovskaya – Lev – Vandras, the calculation of the integral reserves of heavy metals in the sediments. Integrated stock assessment of metals have shown that the average density of metal reserves within the borders of the rivers the Samsonovskaya and the Lev higher compared to river the Vandras. The distribution of the average density of reserves of copper, zinc and nickel in the bottom sediments of the studied rivers is subject to the rule Oddo-Harkins. The maximum concentrations of heavy metals observed in the river sections with the granulometric composition of bottom sediments, which are dominated by particles smaller than 0,005 mm.