Waste Plume Calculator

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The plume calculations require the input of injection rate and duration, along with formation thickness and porosity to evaluate the nominal (no dispersion) plume radius.  This, along with the dispersivity, is then used to calculate the plume radius for varying levels of concentration.   The solution requires evaluation of the error function.  To evaluate normalized concentrations below 1 x 10-15, solutions using Excel will fail, thus a Fortran program is called and used here.

Input Variables
Injection rate (in gpm):
Duration (in yrs):
Formation thickness (in ft):
Formation porosity (-):
Dispersivity (ft):
Interim Calculations
Cumulative injection (in million of gallons):
Displacement radius (in ft):

Using the above interim calculations, click below for concentration as a function of radius
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