Antonio Zarlenga

Gaussian or non-Gaussian logconductivity distribution at the MADE site: What is its impact on the breakthrough curve?

The impact of the logconductivity (Y=ln K) distribution fY on transport at the MADE site is analyzed. Our principal interest is in non-Gaussian fY characterized by heavier tails than the Gaussian. Both the logconductivity moments and fY itself are inferred, taking advantage of the detailed measurements of Bohling et al. (2012). The resulting logconductivity distribution displays heavier tails than the Gaussian, although the departure from Gaussianity is not significant. The effect of the logconductivity distribution on the breakthrough curve (BTC) is studied through an analytical, physically based model. It is found that the non-Gaussianity of the MADE logconductivity distribution does not strongly affect the BTC. Counterintuitively, assuming heavier tailed distributions for Y, with same variance, leads to BTCs which are more symmetrical than those for the Gaussian fY, with less pronounced preferential flow. Results indicate that the impact of strongly non-Gaussian, heavy tailed distributions on solute transport in heterogeneous porous formations can be significant, especially in the presence of high heterogeneity, resulting in reduced preferential flow and retarded peak arrivals.

Advective Transport Through Three-Dimensional Anisotropic Formations of Bimodal Hydraulic Conductivity

Transport of a non-reactive solute in anisotropic bimodal porous formations is investigated through the evaluation of the breakthrough curve. The hydraulic conductivity

Effective Hydraulic Conductivity of Three-Dimensional Heterogeneous Formations of Lognormal Permeability Distribution: The Impact of Connectivity

K

The plume spreading in the MADE transport experiment: Could it be predicted by stochastic models?

K structure is modelled as an ensemble of anisotropic and non-overlapping inclusions, with given hydraulic conductivity

EFFECTIVE CONDUCTIVITY OF AN ANISOTROPIC HETEROGENEOUS MEDIUM OF RANDOM CONDUCTIVITY DISTRIBUTION

K_{i}

Flow velocity statistics for uniform flow through 3D anisotropic formations

Ki, randomly placed in an homogeneous matrix with hydraulic conductivity