The 7Be profiles in the undisturbed soil used for reference site to estimate the soil erosion

International Nuclear Science and Technology Conference 2016

Raksawong, S.^1 ; Krmar, M.^2 ; Bhongsuwan, T.^1

Nuclear Physics Research Laboratory, Geophysics Research Center, Department of Physics, Faculty of Science, Prince of Songkla University, Thailand^1

Department of Physics, Faculty of Science, University of Novi Sad, Trg D. Obradovica 4, Novi Sad

21000, Serbia^2

关键词: Agricultural landscapes;    Cosmogenic radionuclides;    Depth distribution;    Difference values;    Initial activity;    Reference sites;    Soil erosion rate;    Undisturbed soils;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/860/1/012009/pdf
DOI  :  10.1088/1742-6596/860/1/012009

来源: IOP

【 摘 要 】

The cosmogenic radionuclide7Be is increasingly used to obtain information on event-related soil erosion rates within agricultural landscapes. In this study, we select two undisturbed and flat areas to calculate the reference inventory and relaxation mass depth by using7Be technique to document short-term erosion. Our results showed that the depth distribution of7Be in undisturbed soil profiles was 1.0 cm in sites S02 and S03; the initial activities were 31.6 and 38.8 Bq.kg-1, respectively. The relaxation mass depths were 5.4 and 7.2 kg.m-2and the measured reference7Be inventories were 71 and 110 Bq.m-2for sites S02 and S03, respectively. The difference values of the relaxation mass depth and the reference inventory of both sites implied that for determining a short term soil erosion using7Be, the reference site was suggested to be selected as close as possible to the study site.