Editing Drainage Nodes in OpenRoads

Hi Emily,
I can think of a few different ways to address this, depending on what you need to produce.  If your flumes have variable height and length, then it seems to me that it is acting more like a link than a node, so you may want to consider modeling this as a channel link, connecting to cross-section nodes at either end.  If you want to model these as nodes, then you will need a different 2D and 3D cell for each specific design, along with the supporting feature definitions, feature symbologies, and element templates.  How much effort this is depends on how concerned you are about the 3D model.  If all you care about is 2D graphics, then the specific element templates can call up the different 2D plan cells as needed, and you can use the same generic 3D cells for all of them.

Some questions that come to mind:
Are you including these nodes in your Drainage and Utility model to calculate gutter flow interception and spread widths?  If so, how are you modeling the interception?  You could model it as a curb-opening inlet or user-defined inlet for modeling purposes.

Thanks for reply Karl, 

We are using these nodes as part of our drainage and utility model. The node shown in the previous photo is a flume from FDOT's out of the box dgnlib. It is modeled as a curb opening inlet for just spread and gutter interception. 

I went down the rabbit hole yesterday and was looking around our cell library to see the feasibility of making custom 3D and 2D cells for our flumes. We can do it, but it seemed like overkill to make all these custom cells.

Modeling it like channel link seems like a good idea but I have a few concerns.

The flume would not be part of the Utilities/Drainage database within the file. I am unsure if we need all structures modelled as nodes for CADD submissions or if this is okay. Calculation wise it will be okay, we could hard code the bypass from these flumes into the downstream inlets that are not custom flumes as a work around. But ill have to look into the CADD compliance in doing this.

Thanks!

Emily,

I think what Karl is suggesting is that you use both a node and a conduit link.

OpenRoads has the ability to use ditch sections as conduit links. so you would have the curb opening as the inlet node. and outlet ditch node and flume as a conduit. if you look in the bentley training and examples cell file it has these already made as ditches shouldnt be hard to manipulate them into flumes. this would let you analyze the inlets like normal

C:\ProgramData\Bentley\OpenRoads Designer CE 10.10\Configuration\Organization-Civil\_Civil Default Standards - Imperial\Cell

Subsurface Feature Definitions - Imperial.cel

That makes sense, thanks for the clarification!

Correct.  That's what I had in mind.  Thanks.