Hi All,
So we run the model using the SWMM Explicit engine in Civil Storm (CONNECT) and we can see the SWMM Calculation summary in the text format but yet we want to be able to query those node specific results to identify on the map those nodes with flooding duration exceeding X hours or having a flood volume exceeding a certain threshold which is tedious if we'll use labels to look them up. can we do that is select using attribute or filtering in flex tables
Also, I notice despite some manholes having long duration of being flooded and and a sizable flooding volume, the reported ponded depth is still zero (Actually all of them!) so what is this indicating?
If we export the model to the SWMM V5.1 and open and run it there, will we be able to spatially sub-select based on the flooding results (duration and volumes) to locate on the map? I can't imagine that software with such capability while the Haested product line user interface lacking it.. That will surprise me
Does the calculated Max Hydraulic gradient line in civil storm ever record a value greater than the cover level in cases of flooding or it resets? Analyzing existing systems make you ask these kind of questions that we don't face when designing new systems..anyhow; looking forward for your answers?
Thanks
Hello AHQ:
Regarding reporting of overflow volume - this can be done in the Hydraulic Reviewer. You can sort by total overflow volume and you can right click on the row header to find the option to zoom to an element. See:
How to find volume (such as overflow volume) through specific elements
You can also query or color code on the field "Flow (Overflow Maximum)". I realize this isn't volume, but it may be a good indicator.
Regarding the "Depth (flooding)" - this field is currently not supported with the SWMM solver, but you can use a Formula-derived User Data Extension. See:
The result field "Depth (Flooding)" is listed as N/A after computing a model with the SWMM engine. Is there a way to see the depth of flooding for a node?
Regarding EPA-SWMM, I am not aware of a way to "spatially sub-select based on flooding results".
Regarding Max HGL in CivilStorm rising above the node rim elevation - it depends on the solver. The GVF-Rational solver "caps" at the rim elevation and resets as the backwater calculations progress upstream. See more:
Why is the HGL reset to rim elevation for flooded structures?
On the other hand, the Implicit dynamic and Explicit (SWMM) dynamic solvers can calculate overflow, so the HGL can rise above the rim elevation and overflow is calculated. See:
How do the dynamic solvers calculate overflow from a catchbasin or manhole?
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Answer Verified By: A
Thanks. That explains a lot on what to expect from each solver.
On the results viewing side, I tried last night and loaded the EPA SWMM 5.1 software to my work laptop (which runs all Haested products including Civil Storm fine and even Auto-desk Civil 3D and Esri Arc Map and other things) and I exported one of the models from Civil Storm to SWMM 5.
When I tried running it, EPA SWMM 5.1 froze. I am not sure if it is an issue in the exported file format or if the exported model once opened in EPA SWMM 5.1 tries to use more memory than available and causes the "out of memory" error. Civil Storm was less demanding to run the same model successfully although it is loaded with so much more options and utilities to even compare!
Hi AHQ,
EPA-SWMM is a 32-bit application, so the amount of memory it can access is limited. You are likely using the 64-bit version of CivilStorm, which can access all of your system memory.