To model the scour at multiple bridge openings, you need to break the model up to look at the scour at each opening. There is a fairly easy trick in RiverCAD for doing that, and our technical support engineers can demonstrate to you how to compute the scour for each of the openings.
RiverCAD cannot directly compute the scour at a culvert, but you can compute the scour immediately downstream of the culvert. This is were people are concerned with scour at culverts. Again, our technical support engineers can assist you with that.
Feel free to call our toll-free technical support at 1-800-488-4775 during normal business hours and discuss these modeling questions with our engineers or myself.
Sincerely,
Chris E. Maeder, M.S., P.E.
Senior Technical Engineer
chris.maeder@bossintl.com