I am doing a breach analysis of Sacramento River, where a lateral structure representing a project levee is breached. This lateral structure is connected to a parallel wide channel representing bypass system. The tail water connection is set such that, the flow is distributed to multiple cross sections of bypass channel because, the span of the lateral structure extends over few cross sections. Unsteady simulation using this setup crashes in the first timestep, where as when the tailwater connection of the lateral structure is changed to “to a point between two XS’s”, the model runs fine. Did anyone encountered this error ? If so is there an alternative ?
Any suggestions are deeply appreciated.
Thanks !