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Marine Pollution Bulletin
Vol. 92 (1-2), 2015, Pages: 201–211

Natural radionuclides tracing in marine surface waters along the northern coast of Oman Sea by combining the radioactivity analysis, oceanic currents and the SWAN model results

Mohammad Reza Zare, Mojtaba Mostajaboddavati, Mahdi Kamali, Marziyeh Tari, Sanaz Mosayebi, Mohammad Seddigh Mortazavi

Department of Physics, Faculty of Sciences, University of Isfahan, Isfahan 81746-73441, Islamic Republic of Iran.

Abstract

This study aims to establish a managed sampling plan for rapid estimate of natural radio-nuclides diffusion in the northern coast of the Oman Sea. First, the natural radioactivity analysis in 36 high volume surface water samples was carried out using a portable high-resolution gamma-ray spectrometry. Second, the oceanic currents in the northern coast were investigated. Then, the third generation spectral SWAN model was utilized to simulate wave parameters. Direction of natural radioactivity propagation was coupled with the preferable wave vectors and oceanic currents direction that face to any marine pollution, these last two factors will contribute to increase or decrease of pollution in each grid. The results were indicated that the natural radioactivity concentration between the grids 8600 and 8604 is gathered in the grid 8600 and between the grids 8605 and 8608 is propagated toward middle part of Oman Sea.

Keywords: Gamma-spectroscopy; Radioactivity; Oman Sea; SWAN; Water sample; Oceanic current.

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