A new graph of soil Rn-gas transport: Radon-rose plot

Soil radon gas movement depends on soil geology, environmental thermodynamic parameters and, micro-seismic telluric activity. Mapping radon time dependent concentration at the relaxation depth in a selected area, provide transport direction in a seismically high-risk region. Nuclear track methodolog...

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Bibliographic Details
Published in:Applied radiation and isotopes 2021-03, Vol.169, p.109521-109521, Article 109521
Main Authors: Sandoval-Garzón, M.A., Ávila-Abril, L.A., Garcia-Rodriguez, A.M., Bermúdez, M.A., Martínez-Ovalle, S.A., Sajo-Bohus, L.
Format: Article
Language:English
Subjects:
Eastern cordillera of Colombia
Geological parameters
LR-115
Passive detector
Radon soil gas
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Summary:Soil radon gas movement depends on soil geology, environmental thermodynamic parameters and, micro-seismic telluric activity. Mapping radon time dependent concentration at the relaxation depth in a selected area, provide transport direction in a seismically high-risk region. Nuclear track methodology is employed to determine main gradient vector for radon transport. Applying the gradient definition, a “radon rose” graph is constructed from which prone area can be promptly identified. Results show that short time interval, Rn-transport direction may change unpredictably, however, the length of each "spoke" around the circle provides information on the soil Rn-gas probable shifts towards or from a direction per time interval. The new graph is a novelty and provide improved approach for environmental protection and radon dosimetry. •Rn-Rose is presented, this allows discriminate preferential direction of gas radon.•This information combined with soil or climate properties discriminate the influence of these factors.•Results shows that at the porous mediums scale, temperature affects the radon diffusion rate.•Soils with high porosity and moisture seem to be preferential orientation of radon accumulation.•Discriminate preferential radon directions is key for remedial actions in rural households.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2020.109521