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USER NOTIFICATION:"There is a gutter leaving this 'In Sag' catch basin inlet. By definition, gutters should flow towards 'In Sag' inlets - consider reversing the gutter start and stop nodes"

Hi

for the modelling of a gutter I am getting the following warning message:

"There is a gutter leaving this 'In Sag' catch basin inlet. By definition, gutters should flow towards 'In Sag' inlets - consider reversing the gutter start and stop nodes"

Parents
  • Hamid,

    I was able to locate the problem by setting up a model similar to what you have in your screen shot above. The reason that you're getting those user notifications is because you have a gutter defined as the link element between CB-1 and CB-2 and gutters are designed to convey overflow that is not captured by catch basins. You can have a gutter there, but you also need to make sure that you have conduit connecting these two elements in order to convey the subsurface flow.

    Regards,
    Mark

    Mark

  • Hi Mark
    Could you please send me your model?
    Thanks
    Hamid

    Hamid.Akbari@AECOM.COM
  • Hamid,

    After some further analysis of your problem I don't think I was 100% correct in what I previously stated. It's possible that your problem is two fold with the first issue being that GU-1 probably has the start and stop node reversed. You can do this by following the directions located in this wiki:

    https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/19044.how-do-i-reverse-that-start-and-stop-node-for-a-pipe-conduit-gutter-etc

    You need to make sure that the start node is CB-1 and the stop node is CB-2. If the model is already set up that way and you still get a user notification the problem is that you likely have CB-1 set to an inlet in sag and inlets in sag capture all the flow, so none can travel down the gutter. If you change that inlet to a catalog inlet and make it on-grade or sets it as percent capture with anything other than 100% capture that will work. In fact, any combination of an on-grade inlet with inlet type set to not capture 100% of the flow going to the inlet will work for this setup.

    Regards,
    Mark

    Mark

  • Actually I am going to just model a flow entering to a gutter and then convey to a ditch inlet and then to pipes.
    How can I model this?
    Regards

    Hamid
  • You can simply connect the catchment directly to the downstream ditch inlet (catchbasin element) and configure the gutter in the catchbasin properties. The spread and depth reported at the catchbasin location is measured directly upstream of the inlet opening (the part of the gutter directly upstream of the inlet) If you simply have a known flow and not a catchment, you can enter that in the catchbasin properties under "Flow (additional carryover)". 

    From the StormCAD documentation:


    Regards,

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

    Answer Verified By: Sushma Choure 

  • Jesse and Mark

    I appreciate you for your attention to my question,

    Actually I am a little bit confusing about modelling of "gutter and pipe" and  "Spread and depth" measured in the gutter.

    Typically I come across these two following options:

    Option1- when I have ditch inlet and flow enters into it from gutter or from swale.

    Option-2 when I should model stormsewer system into a subdivision.

    I'll appreciate you if you can suggest (or give) me the prepared model which cover these issues?

    Thanks in advance

     

    Hamid

     

     

     

     

     

     

     

Reply
  • Jesse and Mark

    I appreciate you for your attention to my question,

    Actually I am a little bit confusing about modelling of "gutter and pipe" and  "Spread and depth" measured in the gutter.

    Typically I come across these two following options:

    Option1- when I have ditch inlet and flow enters into it from gutter or from swale.

    Option-2 when I should model stormsewer system into a subdivision.

    I'll appreciate you if you can suggest (or give) me the prepared model which cover these issues?

    Thanks in advance

     

    Hamid

     

     

     

     

     

     

     

Children
  • Hamid,

    The spread and depth reported at the catchbasin location are measured directly upstream of the inlet opening (the part of the gutter directly upstream of the inlet). Please see the attached screen shot below:

    I'm not sure what is confusing you about pipes and gutters, but if you could describe what you're confused about with them we would be happy to try to clear that confusion. For modeling your situation that you have described in option 1 please download and have a look at the model that I have provided a link for below:

    https://bentley.sharefile.com/d/sc12fb7dc61e4be1a

    For option 2 I'm not sure what you're asking, so you are going to have to provide more details on what you are looking to model because it sort of just looks like normal model with catch basins, conduits, and gutters. If it's still related to the issue that you were asking about above I'd encourage you to read over the information that I have already written up again as it should describe that situation.

    Regards,

    Mark

    Mark

    Answer Verified By: Sushma Choure 

  • Hi Mark
    Thank you so much for your explaination.
    Actually, by sending the model I got what I was looking for.
    The issue is I just started SewerGems by the videos from Bentley website and there is nothing about swale and gutter and there are just simple sanitary models (not gutter).
    Regarding to the option 2: I 'll appreciate you if you can send me just a rough model of it in SewerGems.

    I appreciate you in advance and looking forward to hearing from you.

    Hamid
  • Please have a look at this:

    https://bentley.sharefile.com/d/s635e1a95d244646b

    Mark

    Mark