Hi to everyone, I’m trying to understand the difference between lid and culvert. I found a similar question in an old topic and the answer was “The major difference between cross section with Lid and culvert is that a “culvert” can flow under Inlet Control and “XS with Lid” is only going to act like a culvert that is flowing under Outlet control”. Is it correct? If it is true, do I have to draw a lid if flow is supercritical and a culvert if flow is subcritical? Thanks in advance.