I have a model that I have both a Floodplain model (unencroached) and Floodway model (encroached) the boundary conditions are the same for both Flow files however I get slightly different WSEs for the 100-yr WSE when I run these plans. They are referencing the same geometry and the boundary condition and flow rate for the 100 year storm events are the same. Stranger, if I remove the 10 and 50-yr storms from the floodplain model, the issue resolves, however I am required to provide these which throws it back off. Any tips or suggestions are appreciated.
As a note, I am trying to “break” the model to help point me in the right direction. If I use 4 profiles, all with the same boundary condition, flow rate, and flow change location, 3 of the 4 match but one is still a couple hundredths off.