Thanks for all of the advice.
After consulting with some other engineers on the project, we've decided that we're trying to make it too complicated. So we have decided to simplify our approach, which should resolve the issue. But I appreciate the help and will return if the need arises again!
I am developing an unsteady HEC-RAS model which includes a channel segement which outfalls to a detention pond, which is then routed through another channel before outfalling to the receiving channel. Thus far, I have not been able to successfully run a stable model. Since the model goes...