EN
A geochemical investigation of two sediment cores retrieved from Plotich’e and Kitaiskoe lakes (Republic of Karelia, Russia) has been carried out. The content of eight heavy metals (Pb, Cd, Zn, Cr, Ni, Cu, Mn, and V) in the modern bottom sediments was determined. The sources of pollution of the sediments of the lake have been revealed. In order to estimate the negative impact of human activities on the urban lakes, the geo-accumulation indexhas been calculated. It is noted that Plotich’e and Kitaiskoe lakes are contaminated by heavy metals in different ways