Tetrachloroethylene (PCE) Transport in Variable-Density Shoreline Model

[PEGGY NGUYEN]

Hi, 

I'm using MODFLOW6-BUY and MT3DMS to model seawater intrusion and PCE fate and transport in a coastal area. In the BUY package, I entered 0.7 for the drhodc for 0.7. Do I enter 0 for PCE in BUY? PCE density is 1.62 g/cm^3 compared to salinity of 1.02 g/cm^3.

My initial PCE concentrations that I am modeling with two separate wells are 31000 ug/L and 26000 ug/L. For the sorption parameter, I'm going to use Kd of 1.01 for clay loam, 0.51 for fine sand, 1.18 for silt loam and 0.99 for loam based on a literature review.

 

Also, I have read that saltwater and PCE don't mix and PCE mass flux concentration increases in the presence of saltwater.  Does BUY take this into consideration?

Does anyone have any advice for inputs and setup of this model?

Thank you,

Peggy