The paper presents data on the vertical distribution of 137Cs of Chernobyl origin in arable and meadow soils to a depth of 40 cm in typical catenary junctions of predpolessie, predopolje, and opolje landscapes with a different density of 137Cs contamination 30 years after the accident at the Chernobyl nuclear power plant. Newly obtained data on the removal of 137Cs beyond the arable horizon presented in the paper indicate that this parameter varies depending on the landscape conditions: it varies in the range of 2.7–17.7% in predpolessie landscapes and in the range of 0.5 to 9% in opolje landscapes. In opolje landscapes, the coefficient of 137Cs removal from the arable horizon was proved to systematically decrease depending on the landscape catenary position: it amounts to 8.5% in the transit zone and is 1.4% in the accumulation zone. The vertical distribution of 137Cs and 210Pbex (excess) in the sod and floodplain soils in the basin of the Kostitsa River was studied to determine the sedimentation rate. Based on the analysis of the distribution of 137Cs in the soil, the sedimentation rate over the past 30 years in various parts of the floodplain was estimated at 0.42 ± 0.08 to 0.58 ± 0.11 cm/year. The average estimated sedimentation rate in the floodplain during approximately 50 past years was, according to the 210Pbex dating was equal to 0.7 ± 0.18 cm/year. The sedimentation rate in the bottom of a ravine was evaluated for sod soils based on the distribution of 210Pbex according to the CRS model for 1961–2016 y. It was revealed that the minimum sedimentation rate of 0.24 cm/year occurred in 1961–1988, and the maximal (0.7 cm/year) in 2000 to 2007.

中文翻译：

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布良斯克地区农业景观链状土壤中 Cs-137 的垂直分布

该论文提供了切尔诺贝利事故发生 30 年后，在具有不同 137Cs 污染密度的 predpolessie、predopolje 和 opolje 景观典型悬链交汇处 40 cm 深度的耕地和草甸土壤中 137Cs 的垂直分布数据。切尔诺贝利核电站。新获得的关于去除可耕地范围之外的 137Cs 的数据表明，该参数因景观条件而异：在前极地景观中的变化范围为 2.7-17.7%，而在 0.5-9% 的范围内opolje 景观。在 opolje 景观中，从可耕地层去除 137Cs 的系数被证明会根据景观悬链线位置系统地降低：在过渡区达到 8.5%，在聚集区达到 1.4%。研究了 Kostitsa 河流域草皮和漫滩土壤中 137Cs 和 210Pbex（过量）的垂直分布，以确定沉积速率。根据土壤中 137Cs 的分布分析，过去 30 年漫滩各部分的沉降速率估计为 0.42±0.08 至 0.58±0.11 cm/年。根据 210Pbex 测年，过去大约 50 年中漫滩中估计的平均沉积速率等于 0.7 ± 0.18 厘米/年。根据 1961-2016 年的 CRS 模型，基于 210Pbex 的分布评估了沟谷底部的沉积速率。研究表明，1961-1988 年的沉降速率最小为 0.24 cm/年，最大（0.7 cm/年）发生在 2000-2007 年。