Hello I am trying to model a 4 way area inlet like the one pictured below. These are used in sag locations maybe in medians or ditches. I found that I was unable to use a trapezoidal gutter section to model this curb type inlet. If I cant use a trapezoidal gutter shape to model the inlet in ditch or a median what would be the best approach to modeling something like this?
Using StormCAD in Power GEOPAK SS4
Hello Chase,
You could use the "gutter depth vs. captured flow" catalog inlet type to model the depth/flow relationship, but you still will not be able to use it with a trapezoidal gutter shape, as that only supports the ditch and grate inlet types.
You could consider using a curb inlet type with curb length set to the sum of the lengths of the openings on the four sides, in conjunction with the "conventional" gutter shape to model the slope on the side of the inlet perpendicular to the flow direction. The resulting spread would be the spread extending from one side, so you'd have to double it and add the width of the structure, to get the total top-width spread. This would get tricky if one side slope was greater than the other.
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Ok that's what I figured I would have to do.
Thanks for the help.
Power GEOPAK SS4
&
OpenRoads Designer
both with StormCAD License
Glad to help. Just to close the loop, I have added this information to our Wiki here: Modeling gutter capture for an area inlet
Answer Verified By: Sushma Choure