Adjustments

Adjustments are optional modifications applied to the temperature, evaporation rate, and rainfall intensity that GeoSWMM would otherwise use at each time step of a simulation. Separate sets of adjustments that vary periodically by month of the year can be assigned to these variables. They provide a simple way to examine the effects of future climate change without having to modify the original climatic time series.

Similarly manner, a set of monthly adjustments can be applied to the hydraulic conductivity used in computing rainfall infiltration on pervious land surfaces and exfiltration from storage nodes and conduits. These can reflect the increase of hydraulic conductivity with increasing temperature or the effect that seasonal changes in land surface conditions, such as frozen ground, can have on infiltration capacity.