SWMM - Direct Tributaries

These inputs are represented by a constant and time-varying component, as follows:

Where:

• Base Value - Specifies the constant baseline component value of the constituent input
  • FLOW - the units are the project flow units (m³/s or ft³/s)
  • Polluents, the units are the pollutant concentration units
  
  If it is set to zero, or the pollutant is not chosen, no baseline entry will be made. assumed.
• Factor Pattern - An optional time pattern whose factors adjust the baseline input on an hourly basis. ;daily, daily or monthly (depending on the type of time pattern specified
• Scale Factor - A multiplier used to adjust the constituent input time series values
  The baseline value is not calculated. adjusted for this factor.
  The scale factor can have many uses, such as allowing you to easily change the magnitude of an inflow hydrograph while maintaining the same shape, without having to re-edit the entries in the hydrograph time series. Or it can allow a group of nodes that share the same time series to have their inputs behave in a time-synchronous manner, while allowing their individual magnitudes to be different.
  The scale factor defaults to 1.0.
• Inflow Type - selects the input data type to be CONCENTRATION (mass/volume) or MASS FLOW RATE (mass/time)
• Time Series - name of the time series that describes the time-varying component of the constituent input stream
  It can be of the type:
  • Concentration
  • Mass
• Unit Factor - A numerical factor used to convert units of pollutant mass flow rate to units of mass concentration per second
  For example, if the input data were in lbs/day and the pollutant concentration was chosen as mg/L, then the conversion factor value would be (453,590 mg/lb) / (86,400 s/day) = 5.25 (mg/s) per (lb/day).
  For concentration type inflows, any value entered will be used. replaced by 1.0