Curve number - Rip rap protected slope
Curve number - Rip rap protected slope
(OP)
I am designing a stormwater system for a proposed development at a site that is a former gravel pit with steep slopes. The geotechnical engineer wants to line the surface of some of the slopes with rip rap for stabilization. The slope in one area is 2:1 and 120-ft long. My question is what should I use for a CN and time-of-concentration?
Thanks
Thanks
RE: Curve number - Rip rap protected slope
For the Tc, you could use shallow concentrated flow with an appropriately low velocity factor.
Otherwise, ask the reviewing agency what they would recommend/accept.
Peter Smart
HydroCAD Software
www.hydrocad.net