Accumulation of 137Cs in puddle sediments within urban ecosystem.

The role of puddle sediments as a final depot of (137)Cs horizontal migration within the urban landscape is studied using the example of Ekaterinburg city, Russia. Radioactive contamination in the city appeared due to fallout after atmospheric testing of nuclear weapons and nuclear accidents. Contamination density of (137)Cs in the region was assessed from archive data to be about 5.