How to calculate trading ratio in water quality market whith multiple pollutants in a river system?

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Ali Hassan Hommadi

multipling discharge with concentration of parameters (BOD, P, N,....)

Edward Mwangi Nduati

https://www.researchgate.net/publication/305082993_A_Multiple_Pollutants_Trading-Ratio_System_for_River_Water_Quality_Trading

Abdulmuhsin S. Shihab

I think using water quality Index or water pollution Index may be benificial for this aim.