Makarychev Sergey Vladimirovich RussiaBarnaulAltai State University, Lenin Ave., 61, Barnaul, 656049, Altai Krai, Russiamakarychev1949@mail.ru Author's articles Study of spatial distribution of elements in the system “water – bottom sediments” of the Uzynbulak creek of the Semipalatinsk test site