×
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

Tide Gate Vs Reverse Flow

Tide Gate Vs Reverse Flow

Tide Gate Vs Reverse Flow

(OP)
I am trying to model a stormsewer system that discharges to a tidal water body. The stomwater pipe systems has sever catchbasins which drain a roadway. I want to model a scenario in which a storm event runoff, say 25 year, coindes with high tide tailwater which closes a tideflex at the downstream end of the stormwater pipe. With the tide gate close under high tide, one will expect the roadway runoff water that has been building in the pipe (because it can discharged from the closed tide gate) to backup from downstream to upstream of the pipe system. Can I model this scenarios as reverse flow in HydroCAD? Also, will HydroCAD reverse flow fill up all the pipe network (pressure flow) before catchbasin reverse flow could occur? Thank you very much for your support.

RE: Tide Gate Vs Reverse Flow

All outlet devices in HydroCAD behave as if they included a one-way valve. Water will flow only in the direction of the outflow arrow. If a reverse-head occurs a warning message is generated, and no further water is discharged through that device in either direction until the tailwater falls below the headwater.

BTW, what you are describing may not actually be a revering flow - you just have water accumulating in the system due to the tidal tailwater and the closed gate valve. Although this is often referred to as "backing up", in most cases the water is just accumulating in the system rather than actually changing the direction of flow.

In a real reversing flow, the water initially flows from point A to B, and then changes direction and flows from B to A. A warning message will alert you to any such reverse-head scenario.


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!


Resources