Estimation of self-cleaning of water ecosystems from heavy metals (on the example of the small rivers of the Ulyanovsk region)

The estimation of self-cleaning of the small rivers of the Ulyanovsk region (the river of Svijaga and its inflows of the river Grounds, the river the Herring, the river of Birjuch) from heavy metals (Fe, Zn, Cu, Ni, Cr) on set of influence of physical and chemical factors is spent. The index of pollution of water of the river of Svijaga in seasonal dynamics of the maintenance of heavy metals is established.