Thanks for the response bltseattle. I have an Engineer who is trying to use this nomograph in sizing pipes within a storm drainage system (approximately 20 connected pipes). It is my understanding that this nomograph is for culverts and not really for pipe systems. I have told him that he...
I have been looking at the "Headwater Depth For Concrete Pipe Culverts With Inlet Control" Nomograph. Is the headwater distance from the invert of the pipe or the top of the pipe? It appears to me that as long as the headwater elevation is lower than the top of pipe, it would simply be free...
