Modeling orifice in horizontal plane in hydrocad
Modeling orifice in horizontal plane in hydrocad
(OP)
I am modeling a roof drain in HydroCAD and want to know how to model this as an orifice in a horizontal plane(Pipe draining vertically). How do I model this if I know the discharge rate coming from the roof and the size of the gutter is predetermined?
I have used the rational method to model the runoff rate for the roof.
I have used the rational method to model the runoff rate for the roof.





RE: Modeling orifice in horizontal plane in hydrocad
If the roof is flat and might detain water, then you should model it as a pond, using a horizontal orifice as the outlet. The routing results will tell you how much water is detained on the roof, and give you a discharge hydropgraph for the downspout.
For details please see www.hydrocad.net/roof.htm