Model to Model Comparison
In the EE 2D map view, initial conditions and model results for two models may be visually compared by subtracting a “Comparison” model from the “Base” model. This is a very useful feature when comparing different model runs for scenario analysis or pre-and post-project impacts. The grids for these models do not need to be identical, just overlap horizontally to allow this comparison. By viewing model differences in space and time allow you to quickly and effectively evaluate differences between the two models. EE uses these tools to help users evaluate Forced Evaporation.
EE allows you to compare any water column parameter for different EFDC+ model runs. For example, dissolved oxygen concentrations in one model run can be subtracted from those in another run and the delta displayed in plan view. For velocity vector plots, either by layer or depth averaged, EE displays both model vectors simultaneously.
Forced evaporation is defined as the additional evaporation due to increased temperatures in the receiving waters from the discharge of heated cooling water. Forced evaporation is being considered by federal and state agencies as a consumptive use for thermal electric power plants. EE serves as a toolbox to provide spatial and temporal evaluations of forced evaporation.
EE allows the user to compare sediment bed conditions, bed shear stress and scour/deposition between models. This is helpful when looking at the impact of a planned engineered structure in a water body with the difference between pre- and post-project model runs clearly seen.