137Cs and 90Sr in bodies of surface water in Bryansk oblast in 1987–2002

The dynamics of the radioactive contamination with ^sup 137^Cs and ^sup 90^Sr of the Besed' and Iput' rivers in 1987-2004 and the nondraining Lake Svyatoe on the Besed' River and the slowly draining Lake Kozhanovskoe in 1992-2002 is prsented. Data on the contamination of the components and shorelines of reservoirs are presented. It is shown that the radioactive contamination of these rivers is decreasing; the present level of contamination is much lower than the intervention level. The radionuclide content in the nondraining and slowly draining lakes remains high. Specifically, the ^sup 137^Cs concentration in the waters of Lake Svyatoe on the Besed' River is at the intervention level, and the ^sup 137^Cs concentration in the fish in Lake Kozhanovskoe is ten times higher than the established norms.[PUBLICATION ABSTRACT]