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Experimental Study on Groundwater Flow and Mass Transport in a Heterogeneous Porous Medium

  • Koichiro Hatanaka (a1), Shingo Watari (a1), Masahiro Uchida (a1), Hiroyasu Takase (a2) and Michael D. Impey (a3)...

Abstract

In performance assessment of geological disposal systems the phenomenon of dispersion in geological media is one of the most important processes to be modeled and is dependent on the heterogeneity of the media. In order to understand the dispersion process in a well defined heterogeneous field, laboratory experimental apparatus, named MACRO, was constructed to study fluid flow and mass transport. A synthetic heterogeneous field was constructed in a flow-bed using six kinds of glass beads with diameters of 0.1, 0.15, 0.2, 0.4, 0.6 and 0.8 mm. Both dye (brilliant blue) and NaCI solution were used as tracers in the experiment. A particle tracking method, considering advection, was used in numerical simulations of the experiment, and the dispersion effect was assumed to be expressed by the variability of the local advective velocity in a high resolution numerical grid. The simulated results obtained by the particle tracking method agreed with the measurement, confirming the applicability of modelling approach used in this study.

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1. Power Reactor and Nuclear Fuel Development Corporation (PNC), Research and Development on Geological Disposal of High-Level Radioactive Waste, PNC Technical Report, PNC TNI1410 93–059, 1993.
2.. Kinzelbach, W., Groundwater Modelling, Developments in Water Science 25, Elsevier, 1986.
3. Gelhar, L.W., Welty, C., and Rehfeldt, K.R., A Critical Review of Data on Field-Scale Dispersion in Aquifers, Water Resources Research, Vol.28, No.7, 19551974, 1992.
4. Grindrod, P., Impey, M.D., Channelling and Fickian Dispersion in Fractal Simulated Porous Media, Water Resources Research, Vol.29, No. 12, 40774089, 1993.

Experimental Study on Groundwater Flow and Mass Transport in a Heterogeneous Porous Medium

  • Koichiro Hatanaka (a1), Shingo Watari (a1), Masahiro Uchida (a1), Hiroyasu Takase (a2) and Michael D. Impey (a3)...

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