Calculate flow accumulation from trace utility network

Question

Hi everyone!

I have a customer who needs to calculate the flow accumulation from each service connection along the sewer line up to a selected manhole. For example, when I click on the selected manhole, the system should summarize all upstream flow from connected service points at that location.
Is there a way to calculate this using utility network tools?

Thanks!

RobertKrisher · Accepted Answer

You can use a function to calculate a value using the attributes of the features upstream of the manhole. If you need something more advanced than that you would need to write something to perform the calculation, using the features returned by the trace.

RobertKrisher · Accepted Answer

If I was trying to estimate the feasibility of connecting a new service, my preferred approach would be integrating my UN with a hydraulic model. For basic feasibility like this I would calculate the number of customers per pressure zone, which you can do by adding a summary function to the subnetwork definition for your pressure zones. You can see an example of this in action in this tutorial:https://learn.arcgis.com/en/projects/get-started-with-arcgis-utility-network-for-water/

You can only support so many customers in a pressure zone before you degrade the water pressure, so you'd want to rely on the number of customers in the pressure zone. Looking at the upstream/downstream doesn't work in a looped pressurized system. You could try and do something with an isolation trace, but it'd be a lot of work to build something scalable to do that, and it would be more reliable to look at the pressure zone anyways.