V. 4 Issue 1 February, 2008
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PADEP New Quick Domenico Model
SEVIEW now includes a link from the Pennsylvania Department of Environmental Protection New Quick Domenico model. This is important as it along with all versions of the Domenico equation produce the same concentration no matter what contaminant is simulated or in what aquifer type. In other words, if the benzene concentration for a gravel aquifer is 13.29 mg/L at 100 feet downgradient. Then the benzo[a]anthracene concentration at 100 feet downgradient in a clay aquifer would also be 13.29 mg/L. The only thing that changes is the contaminant travel time. Used this way the Domenico equation results are about one to three orders of magnitude higher than those produced by other models such as AT123D and MODFLOW/MT3D. There is no question that these are very conservative results.

The problem is that the Domenico equation under estimates contaminant mobility. The obvious solution is to run the Domenico equation until the peak concentration is observed. This works as long as biodegradation is not simulated. Itís simple as travel times increase so does biodegradation. Exaggerated travel times produce inflated amounts of biodegradation and as such the lowest contaminant concentrations. For instance the Domenico equation results for benzene were up to 78 orders of magnitude lower than those produced by the AT123D and MODFLOW/MT3D models. This makes the Domenico equation the least conservative model.

Free Upgrade
Version 6.3.9 of SEVIEW including the New Quick Domenico link is available as a free update. Contact us at seview@seview.com or by phone at 608 240-9878 to learn more.

Domenico Equation

Least conservative model
Orders of magnitude less conservative than AT123D and MODFLOW/MT3D
Identical results for all contaminants
Identical results for all aquifer types

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