In this case, it seems that SWMM automatically assigns a very slight slope to these conduits. "WARNING 04: minimum elevation drop used for Conduit 6"
Is there any reason to avoid vertical conduits? The user should check for errors in the length and in both the invert elevations and offsets at the conduit's upstream and downstream nodes."īut when I look through my input file, the conduit I am being warned about is a vertical conduit, so the length and the elevation drop are equal (the drop does not exceed the length).Ĭan I override SWMM's warning since a vertical conduit is physically possible?
The program computes the conduit's slope as the elevation drop divided by the length instead of using the more accurate right triangle method. "The elevation drop across the ends of a conduit exceeds its length. I looked through the user manual for this warning, and it says this: "WARNING 08: elevation drop exceeds length for Conduit 9".
#Chi pcswmm user manual how to
There should be enough upgradient head to force flow through the horizontal and upward-sloping conduits, but I am getting no flow at my system outlets, and two error messages I'm not sure how to handle: I have a system with vertical conduits, horizontal conduits, and some conduits that slope upwards.