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| Author: | Groves-Kirkby, C. J. Denman, A. R. Phillips, P. S. |
| Title: | Lorenz Curve and Gini Coefficient: Novel tools for analysing seasonal variation of environmental radon gas |
| Journal: | Journal of Environmental Management
2009 : JUN, VOL. 90:8, p. 2480-2487 |
| Index terms: | environment gas industry case studies |
| Freeterms: | radon Lorenz Curve; Gini Coefficient seasonal variation |
| Language: | eng |
| Abstract: | Based on a methodology derived from Economics, the Lorenz Curve and Gini Coefficient are introduced as tools for investigating and quantifying seasonal variability in environmental radon gas concentration. The results suggest significantly different annual variation profiles between domestic radon concentrations in different countries and between regions within a country, highlighting the need for caution in ascribing seasonal correction factors to extended geographical areas. It is shows the following: 1) the underlying geography, geology and meteorology of a region have defining influences on the seasonal variability of domestic radon concentration. 2) similar differences in annual variation profiles are found for soil-gas radon measured as a function of depth at a common site, and among the activity levels of certain radon progeny species, specifically 214Bi deposited preferentially in human body-fat by decay of inhaled radon gas. Conclusions on the association between these observed measures of variation and potential underlying defining parameters are presented. |
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