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

Saidi, Fethi; Touze-Foltz, Nathalie; Goblet, Patrick

doi:10.1016/j.geotexmem.2007.05.003

Cited by 42 publications

(7 citation statements)

References 14 publications

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“…1, can be an effective barrier to contaminant transport in a solid waste landfill (e.g., Rowe et al, 2004Rowe et al, , 2007Rowe, 2005;Barroso et al, 2006;Dickinson and Brachman, 2006;Touze-Foltz et al, 2006;Bouazza and Vangpaisal, 2006;Bouazza et al, 2008;Saidi et al, 2008). To act as an effective barrier, physical damage to the geomembrane and GCL must be limited to allowable levels.…”

Section: Introductionmentioning

confidence: 99%

Geomembrane strains from coarse gravel and wrinkles in a GM/GCL composite liner

Brachman

Gudina

2008

Geotextiles and Geomembranes

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Section: Introductionmentioning

confidence: 99%

Geomembrane strains from coarse gravel and wrinkles in a GM/GCL composite liner

Brachman

Gudina

2008

Geotextiles and Geomembranes

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“…The results showed that existing equations and analytical models all have limitations and no universal equation or method is available for predicting leakage rates. Various parameters on the leakage flow through defects in the geomembrane is studied by Saidi through numerical modelling and the results revealed that the interaction between two adjacent square defects does not result in an important reduction of the flow rate and wetted areas can be approached by an ellipse or by an 8-shape depending on the distance separating adjacent defects [6].…”

Section: Introductionmentioning

confidence: 99%

Seepage properties of geomembrane faced sandy-gravel dams with different dam heights due to defect-induced leakage

Cen¹,

Wang²,

Deng-jun³

2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

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Abstract. The unsaturated seepage theory was employed to calculate the seepage field of geomembrane faced sandy-gravel dams with different heights. The influences of the location and size of defect on the phreatic line and seepage flux of dam were analyzed particularly. The results revealed that the change trends of the phreatic line and seepage flux of dams with different heights are basically the same. However, the height of phreatic line and the seepage flux both decrease with increasing defect location in geomembrane. In addition, the size of the defect has little influence on the phreatic line and seepage flux.

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“…Kable et al [13] studied the diffusion of acetone through composite liners by the finite layer method. EI-Zein [14] and Saidi et al [15] analyzed contaminant transport through composite liners using the finite element method. These numerical models play an important role in the simulation of contaminant transport through composite liners.…”

Section: Introductionmentioning

confidence: 99%

An analytical solution to contaminant transport through composite liners with geomembrane defects

Xie

Chen

Lou

2010

Sci. China Technol. Sci.

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To investigate the performance of landfill composite liner system, a one-dimensional model was developed for solute transport through composite liners containing geomembrane defects. An analytical solution to the model was obtained by the method of Laplace transformation. The results obtained by the presented solution agree well with those obtained by the numerical method. Results show that leachate head and construction quality of geomembrane (GM) have significant influences on the performance of the composite liners for heavy metal ions. The breakthrough time of lead decreases from 50 a to 19 a when the leachate head increases from 0.3 m to 10 m. It is also indicated that the contaminant mass flux of volatile organic compounds (VOCs) induced by leakage can not be neglected in case of poor construction quality of the landfill barrier system. It is shown that diffusion coefficient and partition coefficient of GM have great influences on solute transport through composite liners for VOCs. The breakthrough time of heavy metal ions will be greatly overestimated if the effects of diffusion and adsorption of clay and geosynthetic clay liner (GCL) are neglected. The composite liner consisting of a geomembrane and a GCL provides a poor barrier for VOCs. The presented analytical solution is relatively simple to apply and can be used for preliminary design of composite liners, evaluating experimental results, and verifying more complex numerical models. defect, composite liner, contaminant transport, analytical solution, leachate head, landfill, groundwater contamination Citation:Xie H J, Chen Y M, Lou Z H. An analytical solution to contaminant transport through composite liners with geomembrane defects.

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

Cited by 42 publications

References 14 publications

Geomembrane strains from coarse gravel and wrinkles in a GM/GCL composite liner

Geomembrane strains from coarse gravel and wrinkles in a GM/GCL composite liner

Seepage properties of geomembrane faced sandy-gravel dams with different dam heights due to defect-induced leakage

An analytical solution to contaminant transport through composite liners with geomembrane defects

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