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Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Modelling of radon-222 as a proxy for vapour phase transport in the unsaturated zone

Gibbons, D A and Kalin, R M and Johnston, H (2000) Modelling of radon-222 as a proxy for vapour phase transport in the unsaturated zone. In: Calibration and reliability in groundwater modelling. IAHS Publication . International Association of Hydrological Sciences, Wallingford, pp. 334-339. ISBN 1901502368

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Abstract

This study uses naturally occurring Rn-222 as a tracer in the unsaturated zone to better understand volatile organic compounds (VOC) release, transport and interaction. Using the STELLA Research software package, a two-dimensional model of Rn-222 transport and generation in the unsaturated zone was produced. The model was validated using a laboratory facility comprising of a 2 x 1 x 0.2 m layered chamber. In these experiments transport by diffusion is measured for a homogeneous column of material. The model described the Rn-222 concentrations satisfactorily for both simple and complex experiments. Sensitivity analysis and simulated results demonstrate the importance of moisture content in the transport of Rn-222. The simulations show excellent comparison with experimental data and provide good estimation of Rn-222 activity and VOC transport in the unsaturated zone.