[tsoukup]

I'm dealing with a complex urban drainage system and thus using StormNet to model the situation.

My questions are: How do you model the junction nodes between circular pipe links and open-channel links? Junctions assume a storage but in reality there is none. Also, all of my junctions are flooded --- do I set the max depth equal to the pipe diameter? Or to the depth of the open channel? Should a surcharge depth be used?

Please see below for a more thorough description of the situation. Thank you.

I have a detention pond, discharging into an inverted siphon, which then discharges into an open channel. This open channel flows until it encounters 4, 4 ft culverts under a road. The open channel resumes on the other side of the roadway and continues to carry the flow to a lift station. The stormwater is then pumped to a final stormwater pond.

My understanding of StormNet is that I need a junction node between different conduit links (inverted siphon, culverts and open-channels).

From upstream node to downstream I have: detention pond, orifice, junction, inverted siphon (circular pipe), junction, open-channel, junction, culverts (circular pipe), junction, open-channel, pumps (yet to be analyzed)