Total Energy Head (H)

Substituting the Total Head equation and after simplification, the head H can be expressed as follows (see Figure 27.8 (MSMA,2000) or Figure 18.4 (MSMA,2011)for graphical representation of terms in the equation):

                 (Eq 7.5)

where

Q         is the flow rate in culvert barrel (m3/s)

n          is the Manning’s roughness coefficient

A          is the area of flow for full cross section in m2

P          is the wetted perimeter in m

R         is the hydraulic radius (m)

L          is the length of culvert barrel (m)

g          acceleration due to gravity (= 9.8 m/s2)

 

Back:  Friction Loss                      Next: Determining Headwater

Print This Page Print This Page

Leave a Reply

Your email address will not be published. Required fields are marked *

*
*
Website