TMVOC

Hello everyone. I want to learn something about TMVOC from everyone.When I was simulating the initial groundwater flow using TMVOC, the simulation results showed that gas disappeared and was generated in many grid cells. I suspect that there might be a problem with the initial conditions I set, but I have always been confused about how to reasonably set the initial conditions for the boundary grids of the study area. In addition, from multiple simulation trials, I also found that the results of the initial water flow affect the subsequent leakage of pollutants. Has anyone encountered this situation? I would like to express my sincere thanks in advance.