Dépôt numérique

Examination of the seepage face boundary condition in subsurface and coupled surface/subsurface hydrological models.


Téléchargements par mois depuis la dernière année

Plus de statistiques...

Scudeler, Carlotta, Paniconi, Claudio, Pasetto, Damiano et Putti, Mario (2017). Examination of the seepage face boundary condition in subsurface and coupled surface/subsurface hydrological models. Water Resources Research , vol. 53 , nº 3. p. 1799-1819. DOI: 10.1002/2016WR019277.

[thumbnail of P3104.pdf]
PDF - Version acceptée
Télécharger (5MB) | Prévisualisation


A seepage face is a nonlinear dynamic boundary that strongly affects pressure head distributions, water table fluctuations, and flow patterns. Its handling in hydrological models, especially under complex conditions such as heterogeneity and coupled surface/subsurface flow, has not been extensively studied. In this paper, we compare the treatment of the seepage face as a static (Dirichlet) versus dynamic boundary condition, we assess its resolution under conditions of layered heterogeneity, we examine its interaction with a catchment outlet boundary, and we investigate the effects of surface/subsurface exchanges on seepage faces forming at the land surface. The analyses are carried out with an integrated catchment hydrological model. Numerical simulations are performed for a synthetic rectangular sloping aquifer and for an experimental hillslope from the Landscape Evolution Observatory. The results show that the static boundary condition is not always an adequate stand-in for a dynamic seepage face boundary condition, especially under conditions of high rainfall, steep slope, or heterogeneity; that hillslopes with layered heterogeneity give rise to multiple seepage faces that can be highly dynamic; that seepage face and outlet boundaries can coexist in an integrated hydrological model and both play an important role; and that seepage faces at the land surface are not always controlled by subsurface flow. The paper also presents a generalized algorithm for resolving seepage face outflow that handles heterogeneity in a simple way, is applicable to unstructured grids, and is shown experimentally to be equivalent to the treatment of atmospheric boundary conditions in subsurface flow models.

Type de document: Article
Mots-clés libres: aquifères; mouvements atmosphériques; bassins versants; modèle climatique; eaux souterraines; hydrologie; ruissellement; infiltration;
Centre: Centre Eau Terre Environnement
Date de dépôt: 16 juin 2017 15:54
Dernière modification: 24 juill. 2017 09:10
URI: https://espace.inrs.ca/id/eprint/5147

Actions (Identification requise)

Modifier la notice Modifier la notice