Radioactive contamination of the Balchug (Upper Yenisey) floodplain, Russia in relation to sedimentation processes and geomorphology

Peculiarities of distribution of anthropogenic radionuclides in soils and soil fractions of conjugated floodplain landscapes of the Yenisey River

“…Radioactive contamination in vicinity of the discharge point is characterized by high variation [2][3][4]. For example, the coefficient of variation (CV) for 60 Cs-137 activity in the soil profiles in the middle reaches of the Yenisey River were in the range 23-3770 Bq/kg (dry weight), local radionuclide contamination was found as far downstream as the Island of Tungussky.…”

Distribution of artificial radioisotopes in granulometric and organic fractions of alluvial soils downstream from the Krasnoyarsk Mining and Chemical Combine (KMCC), Russia

“…1). The sampling sites were selected at different elevations on the floodplain after a preliminary field radiometric survey indicating areas of maximum radionuclide contamination (Linnik et al 2005(Linnik et al , 2006. Samples were collected to a depth of 40-50 cm and divided into different increments according to the soil master horizons and profile lithology.…”

“…Detailed radioecological studies of the Yenisey focusing on the contamination of water and sediments started only in the 1990s and were most frequent in the last decade (Sukhorukov et al 2000;Bondareva and Bolsunovskii 2008;Bondareva and Artamonova 2011;Sukhorukov et al 2004Sukhorukov et al , 2006Linnik et al 2005Linnik et al , 2006Vakulovsky et al 2006Vakulovsky et al , 2014Bolsunovsky 2011;Kropatcheva et al 2012;Korobova et al 2014). The main practical goal of these studies was to evaluate the level and extent of contamination and its radioecological significance.…”

“…The study is based on the data (published and unpublished) of the international project STREAM (Brown et al 2002;Linnik et al 2005Linnik et al , 2006.…”

Granulometric and mineralogic investigation for explanation of radionuclide accumulation in different size fractions of the Yenisey floodplain soils

“…Many studies were devoted to measurements and experimental evaluations of radionuclides in soils and sediments at different locations on the Yenisey floodplain (Bolsunovsky et al, 2002;Kuznetsov et al, 1994;Nosov and Martynova, 1996;Nosov et al, 1993;Standring et al, 2009;Sukhorukov et al, 2004;Vakulovsky et al, 1995). It was shown that radionuclides from Krasnoyarsk could migrate as far as the Yenisey delta and estuary but their distribution in floodplain areas was significantly heterogenous due to lithology, geomorphology, vegetation of local landscapes (Linnik et al, 2000) and the hydrological regime in the periods of radionuclide discharges (Linnik et al, 2004a(Linnik et al, , 2004b(Linnik et al, , 2005Nosov et al, 1993). Particular attention was paid to the fact that up to 50% of 137 Cs and more than 60% of 60 Co and 152,154 Eu were transported in suspended material (Kuznetsov et al, 1994;Vakulovsky et al, 1995).…”