Abstract
Data are presented on the distribution of Chernobyl-derived 137Cs in different landscapes of the Bryansk region. The role of different landscape-biogeochemical factors in the transformation of the 137Cs contamination field is examined. The distribution of 137Cs in the typical soil catenary junction of predpolessie, predopolje, and opolje landscapes is analyzed. The role of biogeochemical barriers in the 137Cs accumulation is considered. It is revealed that the slope exposure affects the intensity of geochemical migration. In particular, the intensity of lateral migration of 137Cs on the slopes of the southern and southwestern exposure is much higher than that on the slopes of the northern and northeastern exposure. The different types of geochemical lateral structure of landscape are analyzed on the basis of the catenary 137Cs distribution.
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