IWA Publishing

Skip to Main Content

Table 5

Training and testing statistics of GEP models

	Input combination	Training			Testing
	Input combination	R	RMSE	MAE	R	RMSE	MAE
GEP1	Na	0.941	557.36	29.93	0.959	265.59	29.06
GEP2	Na, HCO₃	0.938	570.78	0.37	0.958	267.38	25.08
GEP3	Na, HCO₃, Ca	0.995	166.2	10.57	0.997	76.79	4.32
GEP4	Na, HCO₃, Ca, Mg	0.998	100.15	2.34	0.998	58.93	5.21
GEP5	Na, HCO₃, Ca, Mg, SO₄	0.993	205.4	53.06	0.995	89.77	4.26

	Input combination	Training			Testing
	Input combination	R	RMSE	MAE	R	RMSE	MAE
GEP1	Na	0.941	557.36	29.93	0.959	265.59	29.06
GEP2	Na, HCO₃	0.938	570.78	0.37	0.958	267.38	25.08
GEP3	Na, HCO₃, Ca	0.995	166.2	10.57	0.997	76.79	4.32
GEP4	Na, HCO₃, Ca, Mg	0.998	100.15	2.34	0.998	58.93	5.21
GEP5	Na, HCO₃, Ca, Mg, SO₄	0.993	205.4	53.06	0.995	89.77	4.26