Modélisation du transport d'un soluté réactif en milieux poreux non saturés

Abstract

Solute transfer in soils may create sharp concentration fronts. The numerical modeling of these fronts remains a difficult problem. The proposed one-dimensional model (Wamos-T) is robust and well adapted to these problems. It is based on operator splitting: discontinuous finite elements combined with a slope limiting procedure is used to discretize the advective term, the dispersive and reactive terms of the transport equation being solved by an implicit finite differences scheme. Compared to a widely used finite element method (Hydrus-1D), Wamos-T provides more accurate results when sharp fronts occur.