I exported a storm network to storm sewer that has a flow splitter in it. The pipe inlet is 36" and the primary pipe out is 24" to restrict the amount that goes to a bioretention. There is a 36" overflow pipe located above the 24" pipe. Right now I can only pick one downstream line for the inlet pipe which I have as the 24" primary pipe out. I then model the overflow pipe using a known Q, however, the primary pipe run backs up because it is not accounting for the overflow. Is there a better way to model this?
