Hello,
I am currently using InRoads (S&S) (.stb) to model storm drains. I have a concrete barrier wall as a median and grated drop inlets on either side so I can be said to have an "infinitely" high curb height because the water will never be taller than my median. I have place multiple grate inlets on grade leading up to my sump inlet and the on grade inlets have a spread onto the road in the ball park of 9-11 feet. Using a different program I know that I should expect a spread in the ballpark of 12 feet for the upcoming sump inlet. I know that I have an orifice condition so I set the orifice height at .02 feet because I always want orifice equations to be used but when I do this it produces a spread of 1 foot for the sump inlet which is not correct. When I set an orifice height of 6" or higher, it uses the weir equations and gives a spread of about 6 feet which is still not correct.
MicroStation V8i (Selectseries 2) - Version 08.11.07.443
Bentley InRoads V8i (Select Series 2) - V08.11.07.615