I am trying to create an SSA model related to an area going into a pond/storage node that has a standpipe outflow structure with a side orifice and one outflow culvert to the outfall. There is also an emergency overflow channel.
Here is what I setup in SSA:
A subbasin with the outlet as the storage node/pond.
The storage node/pond with two orifice links out for the standpipe.
The first orifice has a type of side with the elevation at the same as the outflow culvert elevation.
The second orifice is a type of bottom with the crest elevation that is the top elevation of the standpipe.
A conveyance link for the channel that has an invert in elevation 3' over the top (bottom) orifice.
The culvert out was added as a conveyance link.
To connect the orifices to the culvert, a Junction is used, which is causing the issue.
The junction has the two orifice links in and the culvert out, however, the junction inflow from the orifices is greater than the culvert out max discharge. I can not limit the junction inflow (orifice outflows) by the max flow of the culvert and because of that, the elevation at the junction is higher than the invert going into the outflow channel, but no flow is going through the channel because the storage node elevation does not go that high. I turned off the Enable overflow ponding at nodes, but this is not stopping the surcharge at the junction.