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Krypton gas as a novel applied tracer of groundwater flow in a fissured sandstone aquifer

McNeill, G.W. and Yang, Y.S. and Elliot, T. and Kalin, R M (2001) Krypton gas as a novel applied tracer of groundwater flow in a fissured sandstone aquifer. In: New approaches characterizing groundwater flow. A A Balkema, pp. 143-148. ISBN 902651848X

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Abstract

Dissolved krypton gas (Kr) has been used as a novel, applied and "environmentally-friendly" groundwater tracer in the fissured Sherwood Sandstone aquifer at Queen's University Belfast, Northern Ireland. The tracer test involved a single-well slug injection and withdrawal (so-called "push-pull") technique, to study the dual-permeability nature of the aquifer. Analytical modelling of the tracer transport demonstrates that the shape of the Kr breakthrough curve is a result of two processes: relatively rapid dispersion of the tracer through rock fissures and slower diffusion into the sandstone pore spaces. Characterisation of this dual-permeability nature is important in assessing movement and fate of groundwater contaminants in the aquifer.