Counter for concentration exceedances

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Jackson White

• November 04, 2025 01:05

Hi there, 

I'm trying to make a counter for the number of concentration exceedances based on some provided compliance limits. How I'm trying to model this is by comparing between the modelled concentration (a vector) and the compliance limit (another vector) at each time step. I like the idea of populating a matrix, as was implemented in Monthly and Annual Totals – GoldSim Help Center, then integrating these exceedances monthly or yearly.

If there are any 'elegant' solutions out there, I am very receptive to hearing them. For now, I will implement a lot of scalar values.

Cheers, 

Jackson 

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  Jason

  • November 04, 2025 19:28
  • Edited

  Jackson,

  One way to do this is with a vector constructor inside an Integrator. Below is a screen capture of a simple model that just does a comparison between the concentration and the compliance limit on an "item per item" basis with the vector constructor. The key is this equation:

  vector(if(Modelled_Concetration[row] > Compliance_Limit[row], 1, 0))

  This equation is like a FOR loop that walks over all the rows of your concentration vector. The integrator will count at a rate of once per day and this works for a 1-day time step. If you have a different time step, you might need to adjust this part.

  Go here for more about vector constructors: https://help.goldsim.com/#GS/definingarraysinaninputfieldusingarrayconstructorfunctions.htm

  Does it make sense?

  -Jason

  

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  Jackson White

  • November 05, 2025 04:21
  • Edited

  Thanks for your response Jason, that makes sense. I wasn't sure how to implement that workflow but that was the intention.

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