Pollutants

Create or edit Pollutant objects.

The SWMM method can simulate the generation, inflow and transport of any number of user-defined pollutants.

Required information for each pollutant includes:

• Pollutant name.

• Concentration units i.e. milligrams/litre, micrograms/litre, or counts/litre.

• Concentration in rainfall.

• Concentration in groundwater.

• Concentration in inflow/infiltration Infiltration is the process of rainfall penetrating the ground surface into the unsaturated soil zone of pervious sub-catchment areas..

• First-order decay coefficient.

Co-pollutants can also be defined in SWMM. For example, 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 from subcatchment areas are determined by the land uses assigned to those areas. Input loadings of pollutants to the drainage system can also originate from external time series inflows, as well as from dry weather inflows.

Procedure

1. The Pollutant Editor displays.

2. You can edit the properties of existing pollutants, create new pollutants or delete existing pollutants.

See Also Land Uses, Pollutant Buildup, Pollutant Washoff, Inflows Editor