The "pollut_quality" function seems to be unable to set the pollutant concentration of the node correctly.

[Yuan4520]

I tried to set the pollutant concentration of node “EGLS24” using the method mentioned in the official documentation, but after setting it, the concentration printed out is not the one I set. What could be the reason for this?
from pyswmm import Simulation, Links, Nodes with Simulation('E:\\for_pyswmm\\test.inp') as sim: EGLS24 = Nodes(sim)['EGLS24'] for step in sim: EGLS24.pollut_quality = ('COD', 100) print(EGLS24.pollut_quality)
output：The repeated occurrences of {'COD': 0.0, 'TN': 0.0, 'TP': 0.0, 'TSS': 0.0, 'NH3-N': 0.0}

[bemcdonnell]

@Yuan4520, how are the pollutants configured inside your INP file? Can you provide some more information on the INP?

[Yuan4520]

@Yuan4520, how are the pollutants configured inside your INP file? Can you provide some more information on the INP?

just like this

[abhiramm7]

Hi @Yuan4520, just a quick question, were you able to simulate pollutants in pcswmm/epa-swmm ?

[Yuan4520]

Hi @Yuan4520, just a quick question, were you able to simulate pollutants in pcswmm/epa-swmm ?
Hello, thank you so much for your help! I am able to run the pollutant simulation of the INP file in epa-swmm without any issues, just as shown in Figure. Since I set the rainfall to be constantly zero, I modified the Inflows attribute of EGLS24, setting the flow to a constant 0.23 and the COD concentration to a constant 1, which led to the results shown in the figure.
In order to achieve the same effect, I tried using the generated_inflow() function in pyswmm to set the flow of the EGLS24 node to 0.23, but it did not produce the expected results. This issue has been troubling me for quite some time. Thank you again for your help!

[abhiramm7]

Oh that's interesting. Would you be able to share the input file? I want to see if I can debug it on my end.

[Yuan4520]

@abhiramm7 I have sent it to your email and look forward to your answer，thanks！

[bemcdonnell]

@abhiramm7 could you take a look at this?