Dokic, Mrdan

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  • Dokic, Mrdan (3)
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Author's Bibliography

Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)

Petrović, Jelena M.; Dragović, Snežana D.; Dragović, Ranko M.; Đorđević, Milan M.; Dokic, Mrdan; Ćujić, Mirjana

(2016)

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Dragović, Snežana D.
AU  - Dragović, Ranko M.
AU  - Đorđević, Milan M.
AU  - Dokic, Mrdan
AU  - Ćujić, Mirjana
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7098
AB  - The area of southeastern Serbia, the Pinja and South Morava River Basins, is under the influence of very strong erosion, and the aim of this study was to investigate the vertical and spatial distribution of the Cs-137 in the eroded soils of this area. Vertical soil profiles were collected with 5-cm increments from the uppermost layer down to 20, 25, 30, 40, and 50 cm of depth, depending on the thickness of the soil layers, i.e., down to the underlying parent rocks. Measurements of Cs-137 activity concentration were performed by using the HPGe gamma-ray spectrometer ORTEC-AMETEK (34 % relative efficiency and high resolution 1.65 keV at 1.33 MeV for Co-60), from its gamma-ray line at 661.2 keV. The mean Cs-137 activity concentration across all 18 soil profiles (for all soil layers) was found to be 20 Bq kg(-1). In the greatest number of soil profiles, the Cs-137 activity concentration was generally highest in the first soil layer (0-5 cm) and decreased with soil depth, while in a few soil profiles, the peak of either the Cs-137 activity concentration occurred in the second soil layer (5-10 cm) or the Cs-137 activity concentration was almost equal throughout the entire soil profile. The mean Cs-137 activity concentration in the first soil layer (0-5 cm) was found to be 61 Bq kg(-1), and the high coefficient of variation of 92 % pointed out high spatial variability and large range of the Cs-137 activity concentrations in the study area. The obtained results indicate that in the greatest number of soil profiles, Cs-137 is present in the upper layers, with concentration decreasing with depth, as is typical in uncultivated soil. Its spatial distribution was very uneven among the surface soil layers of the investigated sites. One of the main reasons for such pattern of Cs-137 in the study area may be soil erosion. Additional investigations which would support this hypothesis are required.
T2  - Journal of soils and sediments
T1  - Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)
VL  - 16
IS  - 4
SP  - 1168
EP  - 1175
DO  - 10.1007/s11368-015-1192-5
ER  - 
@article{
author = "Petrović, Jelena M. and Dragović, Snežana D. and Dragović, Ranko M. and Đorđević, Milan M. and Dokic, Mrdan and Ćujić, Mirjana",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/7098",
abstract = "The area of southeastern Serbia, the Pinja and South Morava River Basins, is under the influence of very strong erosion, and the aim of this study was to investigate the vertical and spatial distribution of the Cs-137 in the eroded soils of this area. Vertical soil profiles were collected with 5-cm increments from the uppermost layer down to 20, 25, 30, 40, and 50 cm of depth, depending on the thickness of the soil layers, i.e., down to the underlying parent rocks. Measurements of Cs-137 activity concentration were performed by using the HPGe gamma-ray spectrometer ORTEC-AMETEK (34 % relative efficiency and high resolution 1.65 keV at 1.33 MeV for Co-60), from its gamma-ray line at 661.2 keV. The mean Cs-137 activity concentration across all 18 soil profiles (for all soil layers) was found to be 20 Bq kg(-1). In the greatest number of soil profiles, the Cs-137 activity concentration was generally highest in the first soil layer (0-5 cm) and decreased with soil depth, while in a few soil profiles, the peak of either the Cs-137 activity concentration occurred in the second soil layer (5-10 cm) or the Cs-137 activity concentration was almost equal throughout the entire soil profile. The mean Cs-137 activity concentration in the first soil layer (0-5 cm) was found to be 61 Bq kg(-1), and the high coefficient of variation of 92 % pointed out high spatial variability and large range of the Cs-137 activity concentrations in the study area. The obtained results indicate that in the greatest number of soil profiles, Cs-137 is present in the upper layers, with concentration decreasing with depth, as is typical in uncultivated soil. Its spatial distribution was very uneven among the surface soil layers of the investigated sites. One of the main reasons for such pattern of Cs-137 in the study area may be soil erosion. Additional investigations which would support this hypothesis are required.",
journal = "Journal of soils and sediments",
title = "Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)",
volume = "16",
number = "4",
pages = "1168-1175",
doi = "10.1007/s11368-015-1192-5"
}
Petrović, J. M., Dragović, S. D., Dragović, R. M., Đorđević, M. M., Dokic, M.,& Ćujić, M. (2016). Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins).
Journal of soils and sediments, 16(4), 1168-1175.
https://doi.org/10.1007/s11368-015-1192-5
Petrović JM, Dragović SD, Dragović RM, Đorđević MM, Dokic M, Ćujić M. Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins). Journal of soils and sediments. 2016;16(4):1168-1175
Petrović Jelena M., Dragović Snežana D., Dragović Ranko M., Đorđević Milan M., Dokic Mrdan, Ćujić Mirjana, "Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)" Journal of soils and sediments, 16, no. 4 (2016):1168-1175,
https://doi.org/10.1007/s11368-015-1192-5 .
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Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia

Petrović, Jelena M.; Dragović, Snežana D.; Dragović, Ranko M.; Đorđević, Milan M.; Dokic, Mrdan; Zlatkovic, Bojan; Walling, Desmond

(2016)

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Dragović, Snežana D.
AU  - Dragović, Ranko M.
AU  - Đorđević, Milan M.
AU  - Dokic, Mrdan
AU  - Zlatkovic, Bojan
AU  - Walling, Desmond
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1091
AB  - The need for reliable assessments of soil erosion rates in Serbia has directed attention to the potential for using Cs-137 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 Cs-137 measurement were collected from a zone of uncultivated soils in the watersheds of Pcinja 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 and M) model were used to derive estimates of soil erosion and deposition rates from the Cs-137 measurements. The estimates of soil redistribution rates derived by using the PD and D and 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 and M model were judged to more reliable. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Journal of Environmental Radioactivity
T1  - Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia
VL  - 158
SP  - 71
EP  - 80
DO  - 10.1016/j.jenvrad.2016.04.001
ER  - 
@article{
author = "Petrović, Jelena M. and Dragović, Snežana D. and Dragović, Ranko M. and Đorđević, Milan M. and Dokic, Mrdan and Zlatkovic, Bojan and Walling, Desmond",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1091",
abstract = "The need for reliable assessments of soil erosion rates in Serbia has directed attention to the potential for using Cs-137 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 Cs-137 measurement were collected from a zone of uncultivated soils in the watersheds of Pcinja 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 and M) model were used to derive estimates of soil erosion and deposition rates from the Cs-137 measurements. The estimates of soil redistribution rates derived by using the PD and D and 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 and M model were judged to more reliable. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Journal of Environmental Radioactivity",
title = "Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia",
volume = "158",
pages = "71-80",
doi = "10.1016/j.jenvrad.2016.04.001"
}
Petrović, J. M., Dragović, S. D., Dragović, R. M., Đorđević, M. M., Dokic, M., Zlatkovic, B.,& Walling, D. (2016). Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia.
Journal of Environmental Radioactivity, 158, 71-80.
https://doi.org/10.1016/j.jenvrad.2016.04.001
Petrović JM, Dragović SD, Dragović RM, Đorđević MM, Dokic M, Zlatkovic B, Walling D. Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia. Journal of Environmental Radioactivity. 2016;158:71-80
Petrović Jelena M., Dragović Snežana D., Dragović Ranko M., Đorđević Milan M., Dokic Mrdan, Zlatkovic Bojan, Walling Desmond, "Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia" Journal of Environmental Radioactivity, 158 (2016):71-80,
https://doi.org/10.1016/j.jenvrad.2016.04.001 .
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Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations

Dragović, Snežana D.; Janković-Mandić, Ljiljana; Dragović, Ranko M.; Đorđević, Milan M.; Dokic, Mrdan; Kovacevic, Jovan

(2014)

TY  - JOUR
AU  - Dragović, Snežana D.
AU  - Janković-Mandić, Ljiljana
AU  - Dragović, Ranko M.
AU  - Đorđević, Milan M.
AU  - Dokic, Mrdan
AU  - Kovacevic, Jovan
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6062
AB  - The survey results of concentrations of lithogenic radionuclides in surface soils from 213 locations in Serbia, their mutual concentration ratios and spatial distribution are presented. The mean concentrations of uranium, thorium and potassium in soils of 2.6 mg kg(-1), 9.3 mg kg(-1) and 1.8.10(4) mg kg(-1), respectively, were found to be similar with equivalent values reported for soils of regions with similar geological composition and geotectonic structures and also with worldwide average values. The spatial distribution of analyzed radionuclides was geostatistically interpolated using ordinary kriging. The spatial distribution maps of uranium, thorium and potassium concentrations showed their variability among different regions as a consequence of different lithological units of the investigated area. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Journal of Geochemical Exploration
T1  - Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations
VL  - 142
IS  - SI
SP  - 4
EP  - 10
DO  - 10.1016/j.gexplo.2013.07.015
ER  - 
@article{
author = "Dragović, Snežana D. and Janković-Mandić, Ljiljana and Dragović, Ranko M. and Đorđević, Milan M. and Dokic, Mrdan and Kovacevic, Jovan",
year = "2014",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/6062",
abstract = "The survey results of concentrations of lithogenic radionuclides in surface soils from 213 locations in Serbia, their mutual concentration ratios and spatial distribution are presented. The mean concentrations of uranium, thorium and potassium in soils of 2.6 mg kg(-1), 9.3 mg kg(-1) and 1.8.10(4) mg kg(-1), respectively, were found to be similar with equivalent values reported for soils of regions with similar geological composition and geotectonic structures and also with worldwide average values. The spatial distribution of analyzed radionuclides was geostatistically interpolated using ordinary kriging. The spatial distribution maps of uranium, thorium and potassium concentrations showed their variability among different regions as a consequence of different lithological units of the investigated area. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Journal of Geochemical Exploration",
title = "Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations",
volume = "142",
number = "SI",
pages = "4-10",
doi = "10.1016/j.gexplo.2013.07.015"
}
Dragović, S. D., Janković-Mandić, L., Dragović, R. M., Đorđević, M. M., Dokic, M.,& Kovacevic, J. (2014). Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations.
Journal of Geochemical Exploration, 142(SI), 4-10.
https://doi.org/10.1016/j.gexplo.2013.07.015
Dragović SD, Janković-Mandić L, Dragović RM, Đorđević MM, Dokic M, Kovacevic J. Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations. Journal of Geochemical Exploration. 2014;142(SI):4-10
Dragović Snežana D., Janković-Mandić Ljiljana, Dragović Ranko M., Đorđević Milan M., Dokic Mrdan, Kovacevic Jovan, "Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations" Journal of Geochemical Exploration, 142, no. SI (2014):4-10,
https://doi.org/10.1016/j.gexplo.2013.07.015 .
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