SWMM - Monthly Adjustments

Climatology Monthly adjustments are used to provide a set of monthly adjustments applied to temperature, evaporation and precipitation rate that SWMM uses at each time step of a simulation:

• The monthly temperature adjustment is added to the temperature value that SWMM would use in a specific month of the year
• The monthly evaporation adjustment is added to the value of the evaporation rate that SWMM would use in a particular month of the year
• The monthly rainfall (rainfall/runoff) adjustment is a multiplier applied to the value of rainfall that SWMM would use in a particular month of the year
• The monthly Conductivity adjustment is a multiplier applied to the saturated hydraulic Conductivity associated with surface infiltration for a subcatchment, a LID unit or leakage from a conduit or storage unit. The multiplier is not applied when calculating soil percolation rates, deep groundwater losses, or infiltration from the bottom of LID units

Leaving a monthly adjustment blank (filled with values equal to zero) means that there is no adjustment made for that month

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