Assessment of Changes in Chernobyl Contamination and Erosion Rates for Arable Soils Using Resampling Method

IF 1.4 4区农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-09-05 DOI:10.1134/s1064229324601112

M. M. Ivanov, N. N. Ivanova, V. N. Golosov, A. A. Usacheva, G. A. Smolina, D. V. Fomicheva

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Abstract

The transformation of radioactive contamination of agricultural lands with ¹³⁷Cs isotope is one of the evidences of soil erosion. Changes in the radionuclide content and the corresponding rates of soil loss can be assessed quantitatively by repeated soil sampling at key sites over long time intervals. Being highly labor-consuming, such studies are few in number; they have not been conducted previously in the zone of intense Chernobyl contamination in the Central Russia. The method of repeated sampling (resampling) was used in 2023 within the plowed slopes of a small catchment in the southern part of Tula region, 26 years after the first sampling in 1997. The changes in ¹³⁷Cs deposits (kBq/m²) that occurred during this period turned out to be statistically significant, with an average reduction of more than 10%. According to a proportional erosion conversion model based on relative changes in ¹³⁷Cs deposits, the average annual rate of washing off was estimated at 11.7 t /ha. Such values of soil loss are comparable in general with the previously published results of independent mathematical modeling for this area. Thus, the use of resampling method, including that at new sites, appears to be promising for assessing the rate of soil loss. In addition, it permits us to verify the existing erosion models and to trace long-term trends in the spatial transformation of radioactive contamination.

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使用重新采样法评估切尔诺贝利污染的变化和耕地土壤的侵蚀率

摘要农田 137Cs 同位素放射性污染的转化是土壤侵蚀的证据之一。放射性核素含量的变化和相应的土壤流失率可以通过在关键地点进行长时间的重复土壤采样来定量评估。由于这种研究非常耗费人力，因此数量很少；以前也没有在俄罗斯中部切尔诺贝利严重污染区进行过这种研究。2023 年，在图拉州南部一个小型集水区的耕地斜坡上采用了重复采样（重新采样）的方法，这距离 1997 年的首次采样已经过去了 26 年。在此期间发生的 137Cs 沉积量（kBq/m2）变化具有显著的统计学意义，平均降幅超过 10%。根据基于 137Cs 沉积物相对变化的比例侵蚀转换模型，年平均冲刷率估计为 11.7 吨/公顷。这样的土壤流失值与之前公布的该地区独立数学模型的结果基本相当。因此，使用重新取样法（包括在新地点取样）来评估土壤流失率似乎很有前途。此外，它还使我们能够验证现有的侵蚀模型，并追踪放射性污染空间变化的长期趋势。

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来源期刊

Eurasian Soil Science 农林科学-土壤科学

CiteScore

2.70

自引率

35.70%

发文量

137

审稿时长

12-24 weeks

期刊介绍： Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.