Using ModelBuilder, I imported shapefiles and created a sewer model. I am in the process of adding more data. I realized that many sewer pipe bends and connections became manholes. I'd like to remove these false manholes and make it as a bend. Is there a simple way to do so? I could re-create a new conduit and bend it, but I will lose all the information I imported for the conduits. Please let me know if there are simple ways to work around this. Thank you.
Jesse DringoliTechnical Support Manager, OpenFlows ProductsBentley Communities Site AdministratorBentley Systems, Inc.
Answer Verified By: Yoko
SewerCAD (and StormCAD) calculates hydraulic grade on a pipe-by-pipe basis using gradually varied flow equations. It is solves as a network with a backwater or frontwater approach, so that the HGL from one pipe typically crosses continuously over to the next pipe, but not always. For example a discontinuity can be seen between two steep, supercritical pipes as explained in this article:
Hydraulic grade discontinuity at steep pipes or across nodes (frontwater analysis)
So, using a transition in your case could effect the results by way of having multiple conduit elements (which could also change the slope of the pipe), whereas using bends would mean you have one single conduit which is solved as one single conduit at a continuous slope.
You may want to test the sensitivity using a sample area of your model (you might need to isolate it using active topology to make other elements inactive) - run the section of model with transitions, note the results, then convert to bends and compare the results. If you find that there is no notable difference, you could consider accepting the Transition morph workaround.
If you deem that bends are the best approach and the conversion proves too tedious, I would encourage you to check your source data to see if it can be converted to continuous polylines (so that they can be imported as such, with the bends in the pipes imported as bends).