Pollutants Dialog Box
This dialog box allows you to track the generation, inflow and fate of any number of user-specified pollutants. In addition, pollutant X can have a co-pollutant Y, meaning that the runoff concentration of X will have some fixed fraction of the runoff concentration of Y added to it.
Pollutant buildup and washoff on subcatchment areas are determined by the Land Uses assigned to those areas.
Input loadings of pollutants from external and dry weather inflows are supplied through time series data associated with particular nodes of the collection system.
Access this dialog box by selecting Components > SWMM Extensions > Pollutants.
This dialog box contains a toolbar, a list pane on the left that displays all of the pollutants that have been defined in the current model, and the attribute fields on the right that permit the values to be defined for the pollutant that is currently highlighted in the list pane. The toolbar contains the following buttons:
The attribute fields along the right side of the dialog box include:
| Rain Concentration | Lets you define the concentration of the pollutant in rain water for the currently highlighted pollutant. |
| Groundwater Concentration | Lets you define the concentration of the pollutant in groundwater for the currently highlighted pollutant. |
| Decay Coefficient | Lets you define the first-order decay coefficient for the currently highlighted pollutant. |
| Co-Pollutant | Lets you define the name of another pollutant runoff concentration the current pollutant is dependent on for the currently highlighted pollutant. |
| Co-Fraction | Lets you define the fraction of the co-pollutant's runoff concentration that contributes to the runoff concentration for the currently highlighted pollutant. |
| I & I Concentration | Lets you define the concentration of the pollutant in any Infiltration/Inflow. |