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Prediction of water quality parameters of Karoon River (Iran) by artificial intelligence-based models
Emamgholizadeh, S.; Kashi, H.; Marofpoor, I. & Zalaghi, E.
Abstract
This paper describes the application of multilayer
perceptron (MLP), radial basis network and adaptive
neuro-fuzzy inference system (ANFIS) models for computing
dissolved oxygen (DO), biochemical oxygen
demand (BOD) and chemical oxygen demand (COD) levels
in the Karoon River (Iran). Nine input water quality
variables including EC, PH, Ca, Mg, Na, Turbidity, PO4,
NO3 and NO2, which were measured in the river water,
were employed for the models. The performance of these
models was assessed by the coefficient of determination R2,
root mean square error and mean absolute error. The results
showed that the computed values of DO, BOD and COD
using both the artificial neural network and ANFIS models
were in close agreement with their respective measured
values in the river water. MLP was also better than other
models in predicting water quality variables. Finally, the
sensitive analysis was done to determine the relative
importance and contribution of the input variables. The
results showed that the phosphate was the most effective
parameters on DO, BOD and COD.
Keywords
ANN; ANFIS; Karoon River; Water quality
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