Showing papers by "Emmanuel Ledoux published in 1997"
TL;DR: In this paper, a conceptual and numerical macroscopic model of the evolution of the water chemistry during bank-filtration in the case of an experimental site, part of a large well field (Seine river, France).
157 citations
TL;DR: In this paper, the authors estimate the different terms in the hydrologic balance and describe the nature and importance of groundwater flow in an active volcano, and conclude that groundwater flow inside the volcano can be described as a succession of local perched aquifers, which eventually release water to a continuous basal aquifer close to the coast, with diffuse outlets to the ocean.
65 citations
01 Jan 1997
TL;DR: In this article, a new technique for the quick upscaling of absolute permeabilities is presented, which is shown to be more reliable than the standard renormalization, the Kruel-Romeu formula and the algebraic means, for the two high anisotropy ratios, for two different block sizes and for two geostatistical models, and the comparison of the different techniques leads us to recommend the use of the new method in the case where the non-diagonal terms of the permeability tensors are not necessary.
Abstract: A new technique for the quick upscaling of absolute permeabilities is presented. It is shown that this method and the tensorial renormalization are more reliable than the standard renormalization, the Kruel-Romeu formula and the algebraic means, for the two high anisotropy ratios, for the two different block sizes and for the two geostatistical models we have tested. The comparison of the execution time for the different techniques leads us to recommend the use of the new method in the case where the non-diagonal terms of the permeability tensors are not necessary. If the non-diagonal terms are necessary we recommend the use of the tensorial renormalization.
2 citations