Composite outlet structure for Ponds

When doing a new composite outlet structure with orfice and weir, does the rating table information need to be something that is put in prior to running the model? or is the rating table and curve table populated after running the model?

I am updating information in an already set composite outlet structure where the depths changed for the original one, so the office elevations and wier elevations changed from the original one. So there is a rating table and curve that is related to the original information however I was wondering if I need to update that too prior to running it or if it will update on its own with the new information and after running the model and I can go back in and see the updated rating table and curve table?

Thanks

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  • Hello Paola,

    I see you tagged your post with both "SewerGEMS" and "StormCAD". These products have very different handling of ponds, so I would like to confirm that you are referring to SewerGEMS. See: Pond and pond outlet assumptions in StormCAD, SewerGEMS, CivilStorm and SewerCAD

    Assuming you are using SewerGEMS - when using the standard outlet components types (orifice, weir, riser, culvert or vortex valve), the composite rating curve will be calculated and used automatically. There is a compute button inside the Composite Outlet Structure editor window, which enables you to view the composite rating curve and rating table, which you can see on the right side and when clicking the Rating Table tab on the right. This step is not necessary for the program to use the rating table in the network calculations - it will do that automatically when the composite outlet structure is selected in the composite outlet node properties.

    I think you are saying that you have made changes to the outlet component input parameter after computing the rating curve inside the composite outlet structure editor. You can re-click the compute button after making changes to see the impact that they have on the rating curve, and as mentioned before, SewerGEMS will automatically account for those changes and compute the new rating curve as part of the main compute button. If you wish to see the updated rating curve inside the composite outlet editor, you will need to click the compute button inside the composite outlet editor.

    Note that there is also a "user defined rating table" option as an outlet structure component (in the dropdown, instead of the other types like weir and orifice). This is a way to manually define the rating table of an outlet component that does not fit the normal assumptions for the existing available components (weir, orifice, riser, culvert, vortex valve). Since you can still potentially have one or more other components (in addition to a user defined rating table component) inside a particular composite outlet structure, what I mentioned above still applies and you will still need to click the compute button to see the updated overall composite outlet rating curve.

    If this does not answer your question, please provide more details on what you are looking for.


    Regards,

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

Reply
  • Hello Paola,

    I see you tagged your post with both "SewerGEMS" and "StormCAD". These products have very different handling of ponds, so I would like to confirm that you are referring to SewerGEMS. See: Pond and pond outlet assumptions in StormCAD, SewerGEMS, CivilStorm and SewerCAD

    Assuming you are using SewerGEMS - when using the standard outlet components types (orifice, weir, riser, culvert or vortex valve), the composite rating curve will be calculated and used automatically. There is a compute button inside the Composite Outlet Structure editor window, which enables you to view the composite rating curve and rating table, which you can see on the right side and when clicking the Rating Table tab on the right. This step is not necessary for the program to use the rating table in the network calculations - it will do that automatically when the composite outlet structure is selected in the composite outlet node properties.

    I think you are saying that you have made changes to the outlet component input parameter after computing the rating curve inside the composite outlet structure editor. You can re-click the compute button after making changes to see the impact that they have on the rating curve, and as mentioned before, SewerGEMS will automatically account for those changes and compute the new rating curve as part of the main compute button. If you wish to see the updated rating curve inside the composite outlet editor, you will need to click the compute button inside the composite outlet editor.

    Note that there is also a "user defined rating table" option as an outlet structure component (in the dropdown, instead of the other types like weir and orifice). This is a way to manually define the rating table of an outlet component that does not fit the normal assumptions for the existing available components (weir, orifice, riser, culvert, vortex valve). Since you can still potentially have one or more other components (in addition to a user defined rating table component) inside a particular composite outlet structure, what I mentioned above still applies and you will still need to click the compute button to see the updated overall composite outlet rating curve.

    If this does not answer your question, please provide more details on what you are looking for.


    Regards,

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

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