1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Civil engineering - manning's equation through channel

  1. Sep 1, 2010 #1
    civil engineering -- manning's equation through channel

    1. The problem statement, all variables and given/known data

    I'm given the slope S, the flow Q, the n value, and the diameter of the pipe. I am asked if the channel can handle a certain depth D of water.

    2. Relevant equations

    V = (1/n)*R^(2/3) x S^(1/2)

    3. The attempt at a solution

    I don't understand what I need to do. R is the hydraulic depth which is defined as the cross sectional flow divided by the wetted perimeter. Do I use the depth in question, D, and convert this into a hydraulic radius? How? I don't know how to calculate the area of a circle filled to just above half of its radius....
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted