After perusing the StormCAD FAQ:
http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/5078.general-stormcad-faq.aspx
The unit conversion from acre'in/hr to cfs is taken into consideration. So if I multiply my answer by the conversion factor, 1.008...
The 8.55 came from multiplying the area by the runoff coefficient
9*0.95 = 8.55
So if I update the equation:
Q = (0.95)(0.991)(9) = 8.47 csf
It's still slightly off. What factor's are being taken into consideration here? Is it even possible to prove my hand calcs accurate?
I am required to prove my results from StormCAD using hand calculations and my results are off.
First, the drainage area is, 9 but when I look at the properties for the outfall node, it's slightly less, 8.55. I'm not sure why this is.
Using the outfall's given Area in acres, the intensity...
