I have attached an image of what I am trying to model. I have a couple questions. I am trying to model the roadway, which has a bridge parapet. I don't believe there is a straightforward way to set up this type of weir.I could take the openings on both sides of the parapet, and add them together to create an equivalent weir, and then create a compound weir (but this would then reduce the contractions from 4 to 2, which isn't accurate)
Also, I am trying to find literature regarding top and bottom radius - I am trying to insert this arch culvert into that model. I have height and bottom width, but now I am trying to figure out how I can calculate the top and bottom radius.
Any advice you may have will be appreciated. Thanks!