I have a reach (7-1) which receives flows from a Junction “B” (which splits flows from an upstream reach (1-1)). Reach 7-1 has a lateral weir and combines at a Junction C downstream. Junction C combines flows from Reach 7-1 and another reach and sends them to Reach 2-3. Junction B is optimized. In my model, the combined flow below Junction C determined by HECRas does not equal the combined flows entering the junction. What should be the flow value set for the beginning of Reach 2-3?
Sounds like a fairly complex system. I recommend running in unsteady flow. The split flow optimization works ok for simple flow splits, but when you model gets complex, it’s harder to optimize in steady flow. Unsteady flow automatically optimizes.