Split Flow over Roadway with Bridge?

[Callin]

HEC-RAS can not model a split flow (lateral weir) and a bridge between the same two cross sections.

Any ideas on how to model a split flow situation over a roadway if there is a bridge also?

Any suggestions would be appreciated. Thanks!

 

[sam74]

Put the lateral weir between the two required x sections upstream of the bridge (should be close so it won't make much difference. And also raise your bridge deck elevation so that it doesn't become overtopped. If you are modeling more than one of these situations in the same model you could have problems. I found a bug in the past when modeling more than 1 lateral weir. Don't know if it has been fixed yet.