...F. Saidi; N. Touze-Foltz; P. Goblet A numerical study was performed in order to investigate the influence on the flow rate of the presence of defects in the geomembrane of a composite liner involving GCLs. In the approach presented in this paper, porous media in the composite liner, i.e...

... and numerical results are consistent. 17 09 2004 08 08 2005 20 08 2005 © 2005 Thomas Telford Ltd 2005 Geosynthetics Leakage Landfill Liner Geomembrane Defect Interface Numerical model Transient flow This paper aims at quantifying the influence of soil saturation...

...N. Touze-Foltz; J. P. Giroud This technical note presents empirical equations for the evaluation of the rate of advective flow through composite liners, i.e. liners comprising a geomembrane and a low-permeability soil layer. The advective flow considered is due to large circular defects...

...J. P. Giroud; N. Touze-Foltz This paper presents equations for calculating the rate of liquid flow through defects in the geomembrane component of a composite liner. The considered defects have a uniform width and have a length that is finite or infinite. Two types of defects are considered: narrow...

...J.-C. Chai; N. Miura; S. Hayashi Large-scale and relatively long-term model tests of leachate flow through a composite liner due to geomembrane defects were conducted. The model composite liner consisted of a 0.363 m thick soil layer and one layer of geomembrane. The diameter of the model device...

... thus formed is typically used to contain a liquid, such as water or leachate. If there is a defect in the upper geomembrane, some of the liquid initially contained above the upper geomembrane migrates into the bentonite. Similarly, if there is a defect in the lower geomembrane, some of the liquid...

...N. Touze-Foltz; J. P. Giroud This paper presents empirical equations for the evaluation of advective flow rates through composite liners (i.e. liners comprising a geomembrane and a low-permeability soil layer). The advective flow is due to defects in the geomembrane and depends on contact...

... County Road B West, Roseville, Minnesota 55113-4061, USA, Telephone: 1/612-222-2508, Telefax: 1/612-631-9334 2001 geosynthetics Geomembrane Leakage Defect Variable hydraulic transmissivity Technical Paper by N. Touze-Foltz, R.K. Rowe, and N. Navarro LIQUID FLOW THROUGH COMPOSITE LINERS DUE...

... be an important issue for composite liners incorporating a compacted clay liner, it is far less likely to be significant for those incorporating a geosynthetic clay liner. Geomembrane Leakage Defect Wrinkle Wave Technical Paper by N. Touze-Foltz, R.K. Rowe and C. Duquennoi LIQUID FLOW THROUGH COMPOSITE...

...J.P. Giroud; M.V. Khire; T.D. King; T.R. Sanglerat; T. Hadj-Hamou This paper provides an equation for calculating the rate of liquid migration through a defect in a geomembrane underlain by a semi-permeable medium. In the context of this paper, a semi-permeable medium is a medium that has...

...J.P. Giroud; M.V. Khire; K.L. Soderman An analytical method is proposed to evaluate the rate of advective liquid migration through a defect in a geomembrane that is overlain by a permeable medium and underlain by a highly permeable medium (i.e. a medium significantly more permeable than...

...J.P. Giroud; B.A. Gross; R. Bonaparte; J.A. McKelvey This paper provides analytical and graphical solutions related to the flow of leachate in a leakage collection layer due to defects in the overlying liner (i.e. the primary liner of a double liner system). The defects are assumed to be small (e.g...

...J.P. Giroud; M.V. Khire; J.A. McKelvey The leakage collection layer located beneath a geomembrane liner in a landfill may not have enough flow capacity to convey the leachate migrating through a geomembrane defect without becoming filled with leachate in a certain area around the defect...