Analytical model for transient coupled consolidation and contaminant transport in landfill liner system

Abstract. Contaminant leaks released from landfills are a significant threat to groundwater quality. The groundwater detection monitoring systems installed in the vicinity of such facilities are vital. In this study the detection probability of a contaminant plume released from a landfill has been investigated by means of both a simulation and an analytical model for both homogeneous and heterogeneous aquifer conditions. The results of the two models are compared for homogeneous aquifer conditions to illustrate the errors that might be encountered with the simulation model. For heterogeneous aquifer conditions contaminant transport is modelled by an analytical model using effective (macro) dispersivities. The results of the analysis show that the simulation model gives the concentration values correctly over most of the plume length for homogeneous aquifer conditions, and that the detection probability of a contaminant plume at given monitoring well locations match quite well. For heterogeneous aquifer conditions the approximating analytical model based on effective (macro) dispersivities yields the average concentration distribution satisfactorily. However, it is insufficient in monitoring system design since the discrepancy between the detection probabilities of contaminant plumes at given monitoring well locations computed by the two models is significant, particularly with high dispersivity and heterogeneity.

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Stability Analysis of Landfill Liner System Based on Numerical Simulation

Advanced Materials Research ◽

10.4028/scientific5/amr.446-449.1637 ◽

2012 ◽

Vol 446-449 ◽

pp. 1637-1640

Author(s):

Jun Li Gao ◽

Meng Xi Zhang

Keyword(s):

Numerical Simulation ◽

Stability Analysis ◽

Landfill Liner ◽

Liner System

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Modelling contaminant transport in fly ash–bentonite composite landfill liner: mechanism of different types of ions

Scientific Reports ◽

10.1038/s41598-020-68198-6 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Ankit Garg ◽

Narala Gangadhara Reddy ◽

He Huang ◽

Poly Buragohain ◽

Vinod Kushvaha

Keyword(s):

Fly Ash ◽

Contaminant Transport ◽

Landfill Liner ◽

Different Types

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Behavior of Geosynthetic Clay Liners due to the Migration of Heavy Metal

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.433 ◽

2014 ◽

Vol 989-994 ◽

pp. 433-436 ◽

Cited By ~ 1

Author(s):

Jing Jing Fan

Keyword(s):

Heavy Metal ◽

Low Cost ◽

Compacted Clay ◽

Geosynthetic Clay Liners ◽

Clay Liners ◽

Composite Liner ◽

Landfill Liner ◽

Low Leakage ◽

Liner System ◽

Underlying Soil

To protect the underlying soil and groundwater from landfills, the landfills are commonly lined with layered liner systems. Geosynthetic clay liners (GCL) have been increasingly used in the landfill liner systems to substitude the traditional compacted clay liners (CCL) because of their low cost, easily construction behavior and low leakage rate. To study the behavior of the GM+GCL liner system used in China due to the migration of Pb2+, we introduce in detail GM+GCL liner systems proposed by the Chinese specification. Then one dimensional finite layer model is used to investigate the anti-pollution behavior of the CM+GCL composite liner systems, with the focuses on the heavy metal Pb2+. It could be concluded that the main migration way through the GM+GCL composite liner system is that the transport of Pb2+through a GM+GCL composite liner system of a landfill cover takes place primarily through the holes in the GM. The findings provide useful reference for preventing, controlling and treating groundwater pollution in the GM+GCL liner system technically and scientifically.

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