Dividing Catchment in StormCAD

Question

After drafting storm water network in StormCAD; is there tool able to split the project into catchments and assign those catchments to the nodes where it does drain into according to the topo? if yes; please elaborate using that tool. I am asking that due to the large project and minimize the time of drafting the catchments manually. 
 
 Thanks,

Sushma Choure · Accepted Answer

You can draft the catchments in AutoCAD integrated version of StormCAD or draft catchments in AutoCAD & import into StormCAD.
You can import the multiple catchment areas from the autocad drawing using the tool Modelbuilder. Here is the support solution on Modelbuilder.
http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3070.importing-a-cad-drawing-using-modelbuilder-tn

For assigning the outflow elements to the catchments, please have a look at this support solution.
http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/17529.is-there-any-automatic-method-for-input-tc-or-assign-the-outflow-element-to-the-catchment-area-to-save-time

Jesse Dringoli · Answer

Please see the following Support Solution on catchment delineation: 
 
http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/9590.can-stormcad-civilstorm-sewergems-sewercad-or-pondpack-perform-a-watershed-delineation 
 
As Sushma mentioned, once you have the catchments delineated, you can import them into StormCAD using Modelbuilder. This will automatically create the catchment elements in your StormCAD model. Their scaled areas can be automatically used during calculations.

Mohd Azzam · Answer

But how to link the catchments to the nearest manhole in StormCAD/SewerGEMS? is there tool for that (automatic) or should be done one by one after import the cad file catchment?

MPachlhofer · Answer

Mohammad,

The best tool for associating manholes to catchments as their outflow element is currently ModelBuilder. I have updated the link that Sushma posted above with steps for how you can do this:

communities.bentley.com/.../17529.is-there-any-automatic-method-for-input-tc-or-assign-the-outflow-element-to-the-catchment-area-to-save-time

Please see the last section titled "Option for updating the Outflow elements"

I filed an enhancement for a feature that automatically associates catchments to their nearest outflow element to be considered for future versions of the software. The enhancement number is 186940.

Regards,
Mark

Mark

Scott Kampa · Answer

Hello Randy, 
 Currently, you can assign the catchment to be defined as multiple subareas. You can then use the Subareas collection field. The screenshot below shows where these properties area:

This would still be a single catchment and have only a single outflow element, but it may be useful for some purposes. I will put in a request for a feature to split catchments. If this is included, it will be in a future release of StormCAD. 
 Regards, 
 Scott

Dividing Catchment in StormCAD

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