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Numerical modelling of advective flow through composite liners in case of two interacting adjacent square defects in the geomembrane

Abstract : Technical papers on the quantification of advective flow rates through composite liners assume the existence of a single defect in the geomembrane or of multiple defects that are not hydraulically interacting. In this paper, the results of a numerical study assuming the existence of two identical interacting adjacent square defects in the geomembrane are presented. The composite liners under study incorporate a geosynthetic clay liner (GCL). The impact of various parameters on the leakage flow through defects in the geomembrane is studied among which (1) the distance separating interacting adjacent square defects; (2) the hydraulic head applied on top of the composite liner; (3) the defects width and (4) the interface transmissivity. Results are compared with those obtained for two non-interacting square defects in order to evaluate the hydraulic impact of this interaction. Results obtained in terms of flow rates and wetted areas reveal that (1) the interaction between two adjacent square defects does not result in an important reduction of the flow rate; (2) wetted areas can be approached by an ellipse or by an 8-shape depending on the distance separating adjacent defects
keyword : leakage
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00567936
Contributeur : Pascale Nalon <>
Soumis le : mardi 22 février 2011 - 11:33:51
Dernière modification le : mercredi 14 octobre 2020 - 03:42:10

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  • HAL Id : hal-00567936, version 1

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Fouad Saidi, Nathalie Touze-Foltz, Patrick Goblet. Numerical modelling of advective flow through composite liners in case of two interacting adjacent square defects in the geomembrane. Geotextiles and Geomembranes, Elsevier, 2008, 26 (2), pp.196-204. ⟨hal-00567936⟩

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