I am going to control the run off using two orifices( lower and upper) with super pipe storage. I would like to keep the super pipe slope to a minimum. What is the commonly use minimum slope?
I use 1200mm dia CSP.
Thanks!
Planned to install three orifices along the storm line CBMHs which pases three sub cathcments. Let water pond on the three surfaces to three different elevations.
Used rational formular and hand calculations to control 100yr storm allowable peak flows.
When I sized the last orifice to have...