Articles | Volume 10, issue 7
Nat. Hazards Earth Syst. Sci., 10, 1373–1377, 2010
https://doi.org/10.5194/nhess-10-1373-2010

Special issue: Radon, health and natural hazards

Nat. Hazards Earth Syst. Sci., 10, 1373–1377, 2010
https://doi.org/10.5194/nhess-10-1373-2010

  01 Jul 2010

01 Jul 2010

Temporal and spatial changes of radon concentration in borehole water (Little Carpathians Mts., Slovakia)

I. Smetanová1, K. Holý2, M. Müllerová2, A. Polášková2, and I. Túnyi1 I. Smetanová et al.
  • 1Geophysical Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 28 Bratislava, Slovakia
  • 2Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská dolina, Bratislava, Slovakia

Abstract. The 222Rn activity concentration in ground water from four boreholes was investigated from January 2006 to June 2008. The boreholes are situated in the region of the Astronomical and Geophysical Observatory in Modra-Piesok (Little Carpathians Mts., 40 km NW from Bratislava, Slovakia). Three boreholes have been drilled in Lower Triassic quartzite. Another borehole has been drilled in granodiorite of the Modra massif in which the quartzite is folded. Temporal and spatial differences in radon concentration were observed. Significant short-term variations were noticed in all boreholes. Precipitation caused the changes of water level and strongly affected the values of 222Rn activity concentration in less deep boreholes. The measured activities in boreholes ranged approximately over 1–240 kBq/m3.

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