Transport and fate of nonaqueous phase liquid (NAPL) in variably saturated porous media with evolving scales of heterogeneity |
| |
Authors: | J Zhu |
| |
Institution: | (1) Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2, CA |
| |
Abstract: | A stochastic simulation is performed to study multiphase flow and contaminant transport in fractal porous media with evolving
scales of heterogeneity. Numerical simulations of residual NAPL mass transfer and subsequent transport of dissolved and/or
volatilized NAPL mass in variably saturated media are carried out in conjunction with Monte Carlo techniques. The impact of
fractal dimension, plume scale and anisotropy (stratification) of fractal media on relative dispersivities is investigated
and discussed. The results indicate the significance of evolving scale of porous media heterogeneity to the NAPL transport
in the subsurface. In general, the fractal porous media enhance the dispersivities of NAPL mass plume transport in both the
water phase and the gas phase while the influence on the water phase is more significant. The porous media with larger fractal
dimension have larger relative dispersivities. The aqueous horizontal dispersivity exhibits a most significant increase against
the plume scale. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|