Is there a way to change the routing preference from longest flow path to largest flow.

I am using StormCAD connect to model a stormwater conveyance system. 

Hello Laura,

Could you describe your modeling case in more detail? When you are talking about "longest flow" do you mean travel time, or the actual distance?

Regards,

Scott

My question is in regards to the time of concentration and how that is calculated. I entered in a tc of 0.95 hours and it applied to my system. When I entered this my downstream pipe system that has 2 other pipes entering no longer accounted for the flow from the other two pipes, and defaulted to the longer time of concentration as opposed to the max flow entering the pipe. Is there a setting for modeling that will account for max flow instead of longest tc path. 

Hello Laura,

When multiple pipes converge with the GVF-Rational (StormCAD) solver, the contributing areas ("CA": the rational C times the area) should always be added together. By default, the intensity of the resulting combined flow will be based on the highest of the incoming pipes, as explained in this article from our Wiki:

How is flow balanced at junctions with the GVF Rational Solver (StormCAD)?

However, there is also an option to correct for partial area effects - the "Correct for Partial Area Effects?" calculation option. See the section "Calculation Option for Partial Area Effects" in the above article.

When set to "true", when two or more rational flows enter a single node, the GVF-Rational (StormCAD) solver will adopt the system time that produces the largest rational flow. A larger 'partial area' flow will be carried downstream until the 'total area' flows exceeds it. Further explanation including diagrams can be found in the help documentation, under Theory > Special Considerations > Partial Area Effects. 

Hello Laura,

When multiple pipes converge with the GVF-Rational (StormCAD) solver, the contributing areas ("CA": the rational C times the area) should always be added together. By default, the intensity of the resulting combined flow will be based on the highest of the incoming pipes, as explained in this article from our Wiki:

How is flow balanced at junctions with the GVF Rational Solver (StormCAD)?

However, there is also an option to correct for partial area effects - the "Correct for Partial Area Effects?" calculation option. See the section "Calculation Option for Partial Area Effects" in the above article.

When set to "true", when two or more rational flows enter a single node, the GVF-Rational (StormCAD) solver will adopt the system time that produces the largest rational flow. A larger 'partial area' flow will be carried downstream until the 'total area' flows exceeds it. Further explanation including diagrams can be found in the help documentation, under Theory > Special Considerations > Partial Area Effects.