Petrović Jelena, Dragović Snežana, Dragović Ranko, Đorđević Milan, Đokić Mrđan, Zlatković Bojan, Walling Desmond
Institute for the Application of Nuclear Energy, University of Belgrade, P.O. Box 46, Belgrade, Serbia.
Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, Belgrade, Serbia.
J Environ Radioact. 2016 Jul;158-159:71-80. doi: 10.1016/j.jenvrad.2016.04.001. Epub 2016 Apr 11.
The need for reliable assessments of soil erosion rates in Serbia has directed attention to the potential for using (137)Cs measurements to derive estimates of soil redistribution rates. Since, to date, this approach has not been applied in southeastern Serbia, a reconnaissance study was undertaken to confirm its viability. The need to take account of the occurrence of substantial Chernobyl fallout was seen as a potential problem. Samples for (137)Cs measurement were collected from a zone of uncultivated soils in the watersheds of Pčinja and South Morava Rivers, an area with known high soil erosion rates. Two theoretical conversion models, the profile distribution (PD) model and diffusion and migration (D&M) model were used to derive estimates of soil erosion and deposition rates from the (137)Cs measurements. The estimates of soil redistribution rates derived by using the PD and D&M models were found to differ substantially and this difference was ascribed to the assumptions of the simpler PD model that cause it to overestimate rates of soil loss. The results provided by the D&M model were judged to more reliable.
塞尔维亚对土壤侵蚀速率进行可靠评估的需求，已将注意力引向利用铯-137测量来估算土壤再分配速率的潜力。由于迄今为止该方法尚未在塞尔维亚东南部应用，因此开展了一项勘查研究以确认其可行性。考虑到切尔诺贝利事故大量放射性尘埃沉降的影响被视为一个潜在问题。用于铯-137测量的样本采自皮钦贾河和南摩拉瓦河流域的未开垦土壤区域，该区域土壤侵蚀速率已知较高。利用两种理论转换模型，即剖面分布（PD）模型和扩散与迁移（D&M）模型，根据铯-137测量结果估算土壤侵蚀和沉积速率。结果发现，使用PD模型和D&M模型得出的土壤再分配速率估算值存在显著差异，这种差异归因于较简单的PD模型的假设导致其高估了土壤流失速率。D&M模型提供的结果被认为更可靠。
