No. of Model	Regression coefficients			MBE	RMSE	MPE%	R²	t-Test
No. of Model	A	B	C	MBE	RMSE	MPE%	R²	t-Test
Equation (7)	0.445	0.389	−	−2.65	5.17	4.86	0.968	4.11
Equation (8)	0.511	0.357	0.532	−3.89	4.25	3.54	0.974	3.24
Equation (9)	0.377	0.521	0.611	−3.74	4.98	−2.57	0.986	3.45
Equation (10)	0.412	0.456	0.547	−1.65	3.67	1.68	0.993	2.34
Equation (11)	0.256	0.624	0.465	1.35	3.16	3.45	0.994	3.74
Equation (12)	0.348	0.542	0.389	4.32	5.54	−2.89	0.967	5.32
Equation (13)	0.542	0.375	0.438	−3.58	5.89	−3.45	0.957	6.32
Equation (14)	0.287	0.587	0.547	2.65	3.11	5.27	0.974	4.75
Equation (15)	0.435	0.472	0.657	−3.27	4.35	6.37	0.958	3.89