Research output: Contribution to journal › Article › peer-review
Cesium-137 Runoff from Lake Saimaa to Vuoksa River and Lake Ladoga. / Бакунов, Н. А.; Большиянов, Дмитрий Юрьевич; Правкин, Сергей Александрович; Аксенов, Алексей Олегович.
In: Radiochemistry, Vol. 67, No. 2, 01.04.2025, p. 215-220.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Cesium-137 Runoff from Lake Saimaa to Vuoksa River and Lake Ladoga
AU - Бакунов, Н. А.
AU - Большиянов, Дмитрий Юрьевич
AU - Правкин, Сергей Александрович
AU - Аксенов, Алексей Олегович
PY - 2025/4/1
Y1 - 2025/4/1
N2 - Abstract: The 137Cs migration from the upper reaches of the Vuoksa River, Lake Saimaa, to Lake Ladoga was studied to reveal the role of the river in the Ladoga contamination with 137Cs from the emissions during the Chernobyl accident. The 137Cs migration in 1988–2024 led to a decrease in its concentration in the river water from 113 to ≈4.0 Bq/m3. By 2015, the 137Cs concentration in the Vuoksa River water approached the level of 4–5 Bq/m3, corresponding to the contamination of river waters with global 137Cs prior to the accident. The decrease in the concentration of “Chernobyl” 137Cs in the Vuoksa River is approximated by a two-component exponential dependence with the water half-clearance times Т1 = 5 and Т2 = 25 years, respectively. The runoff of “Chernobyl” 137Cs from Lake Saimaa with the Vuoksa River water in 1986–2023 amounted to 22.5 TBq. This value is comparable in the order of magnitude with the fallout of “Chernobyl” 137Cs on Lake Ladoga in 1986 (74.1 TBq). In 1986–1988, the runoff of “Chernobyl” 137Cs from Lake Saimaa amounted to ≈30% of the total runoff in 1986–2024. The many-year transit of 137Cs from Lake Saimaa caused increased accumulation of 137Cs (≈300 Bq/kg) in the profile of silt sediments of the Vuoksa River and lakes of its catchment area.
AB - Abstract: The 137Cs migration from the upper reaches of the Vuoksa River, Lake Saimaa, to Lake Ladoga was studied to reveal the role of the river in the Ladoga contamination with 137Cs from the emissions during the Chernobyl accident. The 137Cs migration in 1988–2024 led to a decrease in its concentration in the river water from 113 to ≈4.0 Bq/m3. By 2015, the 137Cs concentration in the Vuoksa River water approached the level of 4–5 Bq/m3, corresponding to the contamination of river waters with global 137Cs prior to the accident. The decrease in the concentration of “Chernobyl” 137Cs in the Vuoksa River is approximated by a two-component exponential dependence with the water half-clearance times Т1 = 5 and Т2 = 25 years, respectively. The runoff of “Chernobyl” 137Cs from Lake Saimaa with the Vuoksa River water in 1986–2023 amounted to 22.5 TBq. This value is comparable in the order of magnitude with the fallout of “Chernobyl” 137Cs on Lake Ladoga in 1986 (74.1 TBq). In 1986–1988, the runoff of “Chernobyl” 137Cs from Lake Saimaa amounted to ≈30% of the total runoff in 1986–2024. The many-year transit of 137Cs from Lake Saimaa caused increased accumulation of 137Cs (≈300 Bq/kg) in the profile of silt sediments of the Vuoksa River and lakes of its catchment area.
KW - bottom sediments
KW - cesium-137
KW - concentration
KW - lake
KW - river
KW - water runoff
UR - https://www.mendeley.com/catalogue/a0e0fab7-37f6-3a9a-8c84-56cf6f43fa82/
U2 - 10.1134/S1066362225020134
DO - 10.1134/S1066362225020134
M3 - Article
VL - 67
SP - 215
EP - 220
JO - Radiochemistry
JF - Radiochemistry
SN - 1066-3622
IS - 2
ER -
ID: 136116984