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This option allows the user to input an initial concentration profile at specified depths and also the initial flux into and out of the deposit. A situation where this may be appropriate, is if there is an initial background concentration in a sample, and one is modelling outward diffusion from the sample in a laboratory experiment (eg. see Barone et. al. 1990).
To edit this feature select the Initial Concentration Profile menu item from the Special Features menu. The Initial Concentration form will be displayed. This form has two tabs, one for the profile parameters and one for the depth data.
Note: If any of the layers have fractures, this option cannot be used.
Warning: If using this option it is a good idea to specify a thin layer between zones where there are significant differences between initial concentration (eg. between the soil and a top or bottom reservoir in a diffusion test - see Example 8).