×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Modeling Open Channels in Hydraflow

Modeling Open Channels in Hydraflow

Modeling Open Channels in Hydraflow

(OP)
Using the standalone versions of Hydraflow Express, Stormsewers, Hydrogragphs.  Also had easy access to the Civil 3D extensions, but haven't used them yet.

Trapezoidal channel, and the cross-section stays the same for the length of the channel.  Due to site restrictions, the alignment cannot be modified much- one edge sits on the property line, tying into the existing contours.  The other end is adjacent to a soil buttress that is part of a slope stabilization.  The channel slope varies along the flow path of the channel.

I thought there was some way to model this uniform geometry trapezoidal channel with changing bottom slope in Hydraflow.  I need to determine velocity, freeboard, and hydraulic jump locations to complete my design and prepare the design report.

Any thoughts on how to do this?

Thanks in advance.

RE: Modeling Open Channels in Hydraflow

Suggest you use HEC-RAS.  It's free, and for this simple problem, would be as easy to learn and use ad Hydraflow. Hydraflow, by the way, is no longer available or supported except by Autodesk.  

good luck

RE: Modeling Open Channels in Hydraflow

Probably of more importance is the question: where did you get your design flows ?  If they are based on any of the available hydrology methods they are likely to be no more reliable than 30% to 50%. Even greater errors of estimate are common.

good luck

RE: Modeling Open Channels in Hydraflow

(OP)
HEC-RAS.  I can't believe I didn't think of that- I've only been using it for 6 years.

Thanks for your help.

I know that Hydraflow is not longer available as a standalone.  Since their website is gone, I don't have access to their user forums anymore.

The design flows have to be generated using the Rational Method- it's the city code.  Fairly inaccurate, but it's what is required, so I've built in a bunch of safety.

RE: Modeling Open Channels in Hydraflow

Have you considered regional regression equations ??

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!


Resources