Journal
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
Volume 101, Issue 8, Pages 606-614Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jenvrad.2010.03.008
Keywords
Co-regionalization analysis; Cs-137; Soil organic carbon; Soil redistribution; Total nitrogen
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Funding
- Isfahan University of Technology
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The spatial pattern of soil redistribution rate was investigated using cesium-137 (Cs-137) within a cultivated complex hillslope in western Iran. The relationship between soil redistribution rate and soil organic carbon and total nitrogen pattern were studied using co-regionalization analysis. Ninety-one soil cores were sampled for Cs-137, total nitrogen, and soil organic carbon measurements. The simplified mass balance model estimated a gross erosion rate of 29.8 t ha(-1) yr(-1) and a net soil deposition rate of 21.8 t ha(-1) yr(-1); hence, a net soil loss rate of 8 t ha(-1) yr(-1). This magnitude of soil erosion rate is higher than the acceptable rate in semiarid regions. Co-regionalization analysis and co-dispersive coefficients among the selected variables showed that only a small fraction of the variability in total nitrogen and soil organic carbon could be explained by soil redistribution and that the remaining might be the result of different management practices by local farmers. (C) 2010 Elsevier Ltd. All rights reserved.
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