<< Click to Display Table of Contents >> Navigation:  Chapter 4 Models > Editing a Model > Editing a Primary Landfill Model > Aquitard

To edit the aquitard data for a model click on the Aquitard tab on the left side of the model form. Note that this layer is an attenuation layer beneath the Clay liner. It is typically a layer with a hydraulic conductivity higher than that required for a clay liner (1x10-9 m/s) but less than an aquifer.

 

 

The following parameters can be edited on this tab:

 

Name: This is the name of the aquitard.

 

Symbol: This is the symbol used to draw the aquitard. To change the symbol click on the Change Symbol button.

 

Number of Sublayers: This is the number of sublayers to use for the aquitard. Typically, a value of 10 is used.

 

Thickness: This is the thickness of the aquitard.

 

Density: This is the dry density of the aquitard.

 

Conductivity K: This is the equivalent hydraulic conductivity of the aquitard. If you are unsure what the value of this is, it is recommended to use a leakage rate landfill.

 

Diffusion Coefficient: This is the coefficient of hydrodynamic dispersion for the aquitard.

 

Distribution Coefficient: This is the distribution coefficient for the aquitard.

 

Porosity: This is the porosity of the aquitard.