×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

0.00 CFS COMING INTO MY CATCH BASINS

0.00 CFS COMING INTO MY CATCH BASINS

RE: 0.00 CFS COMING INTO MY CATCH BASINS

It sure looks like a tailwater issue. Even during the 1-year event, the peak elevation in CB2 is higher than the grate in CB1 (downstream catch basins show flow through the grate).

Also - CB1 numbers are suspect as the grate is below the crown of the outlet pipe.

RE: 0.00 CFS COMING INTO MY CATCH BASINS

(OP)
Thanks TerryScan for taking the time to look at this. In your experience, is there a way to fix situations like this? Any parameter I change doesn't seem to have an effect.

Thanks

RE: 0.00 CFS COMING INTO MY CATCH BASINS

If you look at your device routing for each CB, water can only reach the culvert outlet by first flowing though the grate, which is several feet higher. That would be OK if the CB only received water from above-grade through the grate, put it also needs to be able to pass the pipe flow from the upstream CB without forcing it to jump up through the grate.

Short answer: Delete the grate. (Device #3) The grate is not an outlet device on the CB, so it shouldn't be used to limit flow to the culvert.

This will allow water to exit freely through the culvert -or- overflow through your secondary outflow.

For details please see www.hydrocad.net/sewers.htm Note the section entitled "What about the grate?"

Peter Smart
HydroCAD Software
www.hydrocad.net

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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