Author(s): Peter Dahlblom

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Abstract: In this paper, the ability of a laminar pipe-flow model to reproduce the hydrodynamic transport of contaminated groundwater in fractured rock is investigated. It is assumed that the cross-section areas are circular and that the flow is laminar. The molecular diffusion is neglected as well as the impact of variations in velocity over the cross-section area. It is assumed that the cross-section areas in an ensemble of tubes have a gamma distribution. The model is applied to field tracer experiments at two sites. It is shown that the mean size of the cavities is smaller deeper into the ground and that the distribution is narrower. Different values of the parameter of the gamma distribution were used to reproduce the breakthrough course at the different sites. It was shown that there is no general relation between conductivity of a porous medium and its porosity when the pore size distribution is not taken into account.

DOI: https://doi.org/10.1080/00221689209498886

Year: 1992