The Reynolds Number is not shown in SWMM 5 of InfoSWMM but can easily be added to the SWMM 5 code as shown in Figure 1. The equation for the Reynolds Number is
Normally, as shown is Figure 3 the Reynolds number is is very high and is indicative of very turbulent flow based on typical flows, velocities and pipe diameters/hydraulic radius's in SWMM 5 (Figure 2).


