In this paper we discuss the numerical modelling of two inverse problems in porous media flow. In the first problem, we determine the soil parameters that occur in the retention and hydraulic permeability curves of the Van Genuchten ansatz for Richard’s equation. In the second problem we determine the hydraulic permeability, longitudinal dispersivity and adsorption isotherms using the measureme...

During the summers of 1987 and 1988, 15 dye-tracer tests from a total of eight injection points were conducted in the ablation area of Midtdalsbreen, a northern outlet of Hardangerj0kulen, southern Norway. The spatial and temporal patterns of water discharge, shapes of the dye-return curves, through-flow velocities, dye-recovery rates, dispersivities, and velocity/ discharge relationships sugge...

Time dependent dispersivity behavior of non-reactive solutes in a system of parallel fractures G. Suresh Kumar, M. Sekhar, and D. Misra Department of Civil Engineering, Queens University, Kingston, Canada Department of Civil Engineering, Indian Institute of Science, Bangalore, India Department of Mining and Geological Engineering, University of Alaska, Fairbanks, USA Received: 16 March 2006 – A...

fects on solute dispersion. Studying the abrupt passage from a coarse to a finer-textured layer, Koch and Flühler We analyze observed Cl transport during a large-scale in situ (1994) showed that streamlines tend to diverge at such unsaturated infiltration experiment in terms of the observation scale of the transport process and the physical stratification of the Tertiary textural boundaries. At...

The rich and complex phenomena of the transport active particles like microorganisms in shear flows are great significance to various biological environmental applications. Recent studies have shown that motility gyrotaxis algae could greatly influence their waters. However, little attention has been paid initial transient regime when classical Taylor dispersion model is not applicable. To tack...

[1] We investigate flow and solute transport in a heterogeneous unsaturated soil under gravity-driven flow conditions using a direct simulation Monte Carlo method. We account for the cross correlation between the heterogeneous fields of unsaturated flow parameters representing a silty loam. We determine through particle tracking the statistical moments of the travel time distribution for nonpoi...

The purpose of this work was to investigate the effect of solute size on diffusive-dispersive transport in porous media. Miscible displacement experiments were performed with tracers of various sizes (i.e. tritiated water (3H20), pentafluorobenzoate (PFBA), and 2,4-dichlorophenoxyacetic acid (2,4-D)) and a homogeneous, nonreactive sand for pore-water velocities varying by three orders of magnit...