Erosion as a Factor of Transformation of Soil Radioactive Contamination in the Basin of the Shchekino Reservoir (Tula Region)

Golosov, V.N.; Ivanov, M.M.; Tsyplenkov, A.S.; Ivanov, M.A.; Konoplev, A.; Wakiyama, Y.; Konstantinov, E.A.; Ivanova, N.N.

Авторы: Golosov V.N., Ivanov M.M., Tsyplenkov A.S., Ivanov M.A., Konoplev AV, Wakiyama Yu, Konstantinov E.A., Ivanova N.N.
Журнал: Eurasian Soil Science
Том: 54
Номер: 2
Год издания: 2021
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 291
Последняя страница: 303
DOI: 10.1134/S106422932102006X
Аннотация: 137Сs—Redistribution of sediments and Chernobyl-derivedtransported with them were estimatedusing a set of field methods and erosion model calculations for the Shchekino reservoir (Tula region) catchment,and changes in the contents ofin soils of various types that occurred over 1986–2018 were determined.The rate of snowmelt soil erosion on arable land during this period has decreased by about a half in comparison with that in 1960–1985 due to a reduction in soil freezing depth in winter. The rainfall erosion rate increased by about a third between 1986–2003 due to an increase in the rainfall erosivity index; after that,it tended to decrease synchronously with a decrease in the rainfall erosivity. The total average annual soil loss ha–1related to water erosion varies in the range of 1.3–1.6 t depending on the soil type. The erosional loss of 137Сsfrom arable land averaged 1.5–2% of its total inventory, which decreased by more than a half in comparison with the initial inventory in May 1986 due to natural decay. On 0.4% of the arable land with maximum 137Сsrates of erosion, the decrease in theinventory reached 12–40% from the initial inventory. More than 137Сs90% of washed away with sediments from arable lands were redeposited along the transportation path 137Сs way from arable fields to permanent streams. The total soil inventory exceeded its initial inventory at thetime of fallout from the atmosphere in May 1986 in the bottoms of hollows in areas from the lower edge of the 137Сsarable land to the upper reaches of dry first-order valleys due to high sedimentation rates. Theinventory m–2)exceeded the lower threshold of permissible radioactive contamination of soils (37 kBqalso in someother sediment sinks (bottoms of dry valleys, foot of plowed slopes, and a low floodplain of rivers) due to theaccumulation of contaminated sediments.
Добавил в систему: Голосов Валентин Николаевич

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