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The Primary and Secondary Liner Landfill option is used to quickly enter a landfill that may contain a primary leachate collection system, primary composite liner, secondary leachate collection system, secondary composite liner, aquitard, and aquifer. In this option the composite liners can be composed of a geomembrane and/or compacted clay or GCL. The leakage through the geomembrane can be calculated using either equations by Rowe et. al., 2004; equations by Giroud et. al., 1992; or by specifying and equivalent hydraulic conductivity for the geomembrane.
To create a Primary and Secondary Liner Landfill model, select the Primary and Secondary Liner Landfill button on the New Model form and then press the Ok button. The model will be created and can be edited as described in the section, Editing a Primary and Secondary Liner Landfill Model below