Geonets and Geotextiles as Leachate Containment Materials in Landfills: System Dynamics Modeling Perspective

The effectiveness of geonet, geotextile and their composite as containment materials of landfill leachate has been examined in this paper through the use of system dynamics modeling method. The study area is Oriire Local Government Area of Oyo State, Nigeria. Three materials were studied, which include: GN (geonet), GT (geotextile) and GC (geocomposite). The water absorption, hydraulic conductivity, porosity and thickness were the major properties studied in these liners. Governing equations coded in Visual Basic Computer Programming Language was employed in developing a model. Validation of the model was done with data on the study area. The interrelationship of the properties and the breakthrough times for each material was found through the STELLA 9.1.4 software application. This research showed that the effectiveness of the studied of the order GC < GN < GT. GT is, therefore, recommended for use as landfill liners in the study area.

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