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Overfilled Storage

Overfilled Storage

Overfilled Storage

(OP)
I have a catch basin discharging into a stone trench through a pipe.  The trench is sized for the 2 year storm.  Any greater storm is supposed to fill the trench and then overflow through the top of the catch basin.  Is there a way to set a maximum elevation in the trench so that once the elevation is reached, it will overflow the top of catch basin.  Or maybe another way to model this.
Thanks

RE: Overfilled Storage

The easy solution is to model the CB+Trench as a single pond.  The storage would consist of the stone-filled trench (primatoid with appropriate voids), and perhaps a vertical cylinder for the CB storage.  You can use a horizontal orifice or weir for the CB overflow, and perhaps exfiltration for the trench.
 

Peter Smart
HydroCAD Software
www.hydrocad.net
 

RE: Overfilled Storage

(OP)
Thanks for the info.

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