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| Titel |
Shallow circulation groundwater – the main type of water containing hazardous radon concentration |
| VerfasserIn |
T. A. Przylibski |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 6 ; Nr. 11, no. 6 (2011-06-15), S.1695-1703 |
| Datensatznummer |
250009489
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1695-2011.pdf |
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| Zusammenfassung |
The main factors affecting the value of 222Rn activity concentration in
groundwater are the emanation coefficient of reservoir rocks (Kem), the
content of parent 226Ra in these rocks (q), changes in the volume and
flow velocity as well as the mixing of various groundwater components in the
circulation system. The highest values of 222Rn activity concentration
are recorded in groundwaters flowing towards an intake through strongly
cracked reservoir rocks undergoing weathering processes. Because of these
facts, waters with hazardous radon concentration levels, i.e. containing
more than 100 Bq dm−3 222Rn, could be characterised
in the way that follows. They are classified as radon waters, high-radon
waters and extreme-radon waters. They belong to shallow circulation systems
(at less than a few dozen metres below ground level) and are contemporary
infiltration waters, i.e. their underground flow time ranges from several
fortnights to a few decades. Because of this, these are usually poorly
mineralised waters (often below 0.2–0.5 g dm−3). Their
resources are renewable, but also vulnerable to contamination.
Waters of this type are usually drawn from private intakes, supplying water
to one or at most a few households. Due to an increased risk of developing
lung tumours, radon should be removed from such waters when still in the
intake. To achieve this aim, appropriate legislation should be introduced in
many countries. |
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