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sewergems conduit control structure (Hydrobrake design)

Hi,

I would like to know how to design Hydrbrake in sewergems (storm water network)? how to calculate the crest elevation of hydrbrake?

  • Ahmed, I am not familiar with "Hydrobrake" but from a quick internet search it appears that it may be a vortex valve. So, it may be best to model the upstream side of it as a pond element, then use the Vortex Valve feature in a connected pond outlet structure node. You can read more about this here:

    Pond and pond outlet assumptions in StormCAD, SewerGEMS, CivilStorm and SewerCAD

    If you must model the vortex valve in a series of conduits with a conduit control structure, you can use the depth-flow curve option and paste in the vortex valve rating curve values as it appears you may have done. The "Crest elevation" for a depth-flow curve conduit control structure is the elevation of the bottom (invert) of the control structure. Meaning, it is the datum above which the rating curve elevations are added. For example if the crest elevation is set to 2515 m (per your screenshot), a value of 1 m in the Depth column of the Depth-flow curve represents an elevation of 2516 m (2515 + 1). This is documented in the following related Wiki article:

    Using Start and Stop Control Structures for conduits and channels


    Regards,

    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.