Hi,
Let’s try something like this as I didn’t find a clear way of modeling what you are trying. (Based on your description, network downstream of the booster pump will receive water from that pump-station so, I am curious, why you need to trace d/s of booster pump? The source of water is already known, right?)
I assume your network is something like this:
Source A ---->---->----Network---->----Booster Pump---->----> Network
Instead of setting the Concentration (Base) to 0, let’s set it to quite higher value…
I am using Example4 here.
R1 ---->---->----Network---->----PU8 and PU9---->----> Network
1) Create a scenario with a calculation options set to Constituent for Calculation Type.
2) Make sure the Base Constituent Alternative is using NONE constituent
3) Make this scenario active.
4) R1: Is Constituent Source = True, Concentration (Initial) = Concentration (Base) = 100 mg/L
5) J87: (d/s of PU8,PU9): Is Constituent Source = True, Concentration (Initial) = Concentration (Base) = 500 mg/L, Constituent Source Type = Setpoint Booster.
6) Run the model and observe the results.
Most of the time:
Anything below 100 mg/L is from R1 source and anything below 500mg/L is from Booster Pump (If you have too little difference in source contraction, it might difficult to separate the source).
Above is my initial approach and I could be heading wrong :)
Thanks,