Calculating additional velocity due to gradient
Calculating additional velocity due to gradient
(OP)
Hello all,
I hope that you can help me with a simple problem. Hydraulics is not my thing and I'm probably overthinking things.
I have a 1.8m x 32.5m smooth concrete surfaced footbridge which is now inclined an additional 1.5 degrees; what I would like to know is how does the slope affect the water velocity and what is the equation required to show this?
Essentially I need to ensure that the current spitter pipes are of sufficient capacity to handle the inline.
Many thanks,
Michael
I hope that you can help me with a simple problem. Hydraulics is not my thing and I'm probably overthinking things.
I have a 1.8m x 32.5m smooth concrete surfaced footbridge which is now inclined an additional 1.5 degrees; what I would like to know is how does the slope affect the water velocity and what is the equation required to show this?
Essentially I need to ensure that the current spitter pipes are of sufficient capacity to handle the inline.
Many thanks,
Michael
RE: Calculating additional velocity due to gradient
v = kn/n R2/3 S1/2
RE: Calculating additional velocity due to gradient
RE: Calculating additional velocity due to gradient
Thank you very much for your reply. I purposely didn't include all of the information as I believe certain factors weren't required for my query. I can see now that you may have thought that the structure possibly spanned over water, it doesn't.
The velocity that I was seeking for was the storm water passing across the surface of the footbridge due to the increase in elevation at one end.
To answer your final question, a spitter pipe is essentially a pipe to discharge water. Please see attachment.
MDBris
RE: Calculating additional velocity due to gradient
What flow rate are you using to compute the velocity? Was that computed using rainfall runoff processes?
Oh, I should clarify that the slope used in Manning's Equation is the slope of the Energy Grade; however, for normal flow the slope would be the slope of the channel.