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

Pond design for multiple storm events to achieve the desired flows

Pond design for multiple storm events to achieve the desired flows

Pond design for multiple storm events to achieve the desired flows

I was trying to adjust the parameters (i.e. elevation, dimension, length, etc.) for outlet culverts, orifices, and weirs to achieve the desired flows at three rainfall events (i.e. 1-yr, 10-yr, and 100-yr). However, it is very difficult to adjust the parameters manually to meet one rainfall event, and even more difficult to meet all three rainfall events. I have been adjusting the parameters manually for the past two days and I was wondering if there is any optimization function in HydroCAD to do this?

RE: Pond design for multiple storm events to achieve the desired flows

Usually you would start with the smallest event, designing suitable outlet(s), and then work up to the larger events, adding additional storage and outlets as required. You can use the pond sizing report to estimate the required storage for each event www.hydrocad.net/pondsizing.htm

Peter Smart
HydroCAD Software

RE: Pond design for multiple storm events to achieve the desired flows

Thank you Peter.

RE: Pond design for multiple storm events to achieve the desired flows

This should be very easy to do manually if your pond is big enough. Like, ten minutes tops. If you're struggling with it, take a step back and do this.

Throw your pond stage storage out for a moment. Draw in a vertical box that's got a lot of volume in it. Use one slot weir and nothing else, and vary the width of the slot until all your storms barely meet. Write down the 100 year storage in your concept pond. Compare that to your designed pond. If the volumes are significantly different, in particular if this concept pond is much larger in volume than the pond you have to work with, then you'll need to go back to the drawing board and figure out how to get more storage in your pond. You can't fit ten pounds of (flood storage) in a five pound bag.

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com

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


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