Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Generation of 3D Spatially Variable Anisotropy for Groundwater Flow Simulations

Abstract : Sedimentary units generally present anisotropy in their hydraulic properties, with higher hydraulic conductivity along bedding planes, rather than perpendicular to them. This common property leads to a modeling challenge if the sedimentary structure is folded. In this paper, we show that the gradient of the geological potential used by implicit geological modeling techniques can be used to compute full hydraulic conductivity tensors varying in space according to the geological orientation. For that purpose, the gradient of the potential, a vector normal to the bedding, is used to construct a rotation matrix that allows the estimation of the 3D hydraulic conductivity tensor in a single matrix operation. A synthetic 2D cross section example is used to illustrate the method and show that flow simulations performed in such a folded environment are highly influenced by this rotating anisotropy. When using the proposed method, the streamlines follow very closely the folded formation. This is not the case with an isotropic model.
Liste complète des métadonnées
Contributeur : Gabriel Courrioux Connectez-vous pour contacter le contributeur
Soumis le : lundi 14 décembre 2015 - 17:12:47
Dernière modification le : mercredi 3 août 2022 - 04:03:22

Lien texte intégral



Andrea Borghi, Philippe Renard, Gabriel Courrioux. Generation of 3D Spatially Variable Anisotropy for Groundwater Flow Simulations. Groundwater, Wiley, 2015, 53 (6), pp. 955-958 ⟨10.1111/gwat.12295⟩. ⟨hal-01243260⟩



Consultations de la notice