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hydrocad over flow modelling

hydrocad over flow modelling

hydrocad over flow modelling

(OP)
Does anyone have a tip on modelling overflow pipes from a dry well? I just want to send a 12" perforated pipe out of the dry well, but if I use just the pipe it will be modelled as unrestricted flow rather than infiltration.

RE: hydrocad over flow modelling

If you embed the dry-well in stone, the water level is assumed to be the same throughout the stone and dry-well, so you don't need to include the connecting pipe in the model.

Perhaps I don't understand the role of the pipe.  Normally you would have an "overflow" only to convey excess water to another point (node) beyond the infiltration structure.

For details see www.hydrocad.net/pondstore.htm
 

Peter Smart
HydroCAD Software
www.hydrocad.net
 

RE: hydrocad over flow modelling

agreed, I don't see any reason to try and model a subdrain or dry well in hydrocad.  If you want to do it, estimate the amount of exfiltration (perhaps less than 1 cfs) but design your retention basin for the full amount of runoff.

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