Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Manning's formula

Manning's formula

Manning's formula

I am working on an audit for a sewer system and I was wondering if mathCAD could solve manning's formula in a way to give me an equation for an approximation for depth of flow? I have GPD, pipe diameter, pipe length, slope, roughness, but alas I need the depth of flow and I am untaught to this program, but it is what I have.


RE: Manning's formula

Yes, it can be done. If you go to the Mathcad resources page, you should be able to find and download the "Civil Engineering Solved Problems" handbook from here:


This includes (among other things) a worksheet for Manning's n.

(Unfortunately, when I try to load this, it fails because I have Mathcad 14, but the installation routine says it will only run with Mathcad 7. If you have an old licence handy, you might be able to get it to install.)

Hope this helps!

RE: Manning's formula

I found a work-around:

If the installation routine won't recognise your version of Mathcad (because it is looking for version 7), open the installation file with WinZip - this will show you all the included files, which you can then extract to an approriate directory, and open with Mathcad - sweet!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close