Several experiments have evidenced the occurrence of saturation overshoots for flows in homogeneous porous media. Such phenomena are ruled out by standard mathematical models, which are based on equilibrium assumptions. In this presentation we discuss nonequilibrium ...

Recently, it has been suggested that Darcy's Law might not be applicable for modelling miscible, density-dependent flow in porous media. To investigate this, three sets of careful laboratory column experiments were performed on coarse and medium sands, consisting ...

Removal of microorganisms from water due to passage through soil is of great importance in drinking water production. In the present study, results of laboratory experiments for the study of this issue are presented.

In this paper a model is presented which interprets virus removal as a function of collision efficiencies αβ and αλ, inactivation rate coefficient μl and rate parameter γ. Initial high removal is determined by ab, which decreases exponentially at a rate g ...

Various experimental and theoretical studies have shown that Fick's law, based on the assumption of a linear relation between solute dispersive mass flux and concentration gradient, is not valid when high-concentration gradients are encountered in a porous ...