Dust fallout fluxes of 210 Pb and 7 Be were measured in Kuwait during October 2009-August 2011. The annual average depositional fluxes of 210 Pb and 7 Be were 134 and 422 Bq m -2 , respectively. The temporal variations of both radionuclides showed a maximum deposition during April of 2010 and 2011.A strong linear relationship between 7 Be and 210 Pb was found. The average dust depositional rate was about 50 mg m -2 h -1 with a maximum of 460 mg m -2 h -1 , while the extreme value of 664 mg m -2 h -1 was recorded in March 2011 when a massive dust storm hit Kuwait. The 210 Pb deposition has a strong correlation with dust deposition because of its terrestrial abundance. Whereas the 7 Be a radionuclide shows a weaker correlation with dust deposition.
Temporal and Spatial Distribution of Radionuclides in Dust Fallout.
The depositional fluxes of the natural radionuclides (40K, 210Pb, and 7Be) and the man-made radionuclides (137Cs) have been calculated using efficiency calibrated ultra-low background gamma spectrometry in nine sampling sites covering Kuwait.
Maps showing high and low concentrations of radionuclides distribution among Kuwait.
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