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The Primary Liner (Subtitle D) Landfill option is used to quickly enter a landfill that may contain a leachate collection system, primary composite liner, aquitard, and aquifer. In this option the primary composite liner can be composed of a geomembrane and a primary liner. If the geomembrane is present 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.

 

If the model was created using the Primary Landfill template, the model form will display the model data on the left and the model output on the right. The model data can be entered in the tabs for General data, Source & Hydraulic Heads, Geomembranes, Clay Liners, Aquitard, Aquifer, and Special Features. In addition, there is a tab for the subsurface model.

 

 

The data entry for the General data, Source & Hydraulic Heads, Geomembranes, Clay Liners, Aquitard, and Aquifer is described in the sections below. The data entry for the Special Features is the same for all the templates and is described in the Editing Special Features section. Based upon the model data a subsurface model is displayed on the Subsurface Model tab, this is the same for all templates and is described in the section Displaying the Subsurface Model. The control of the display of the model output is the same for all templates and is described in the section Displaying Model Output.