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)	0.385	0.489	−	−3.65	4.35	3.47	0.974	3.58
Equation (8)	0.425	−0.391	0.475	−4.32	3.56	2.58	0.968	4.21
Equation (9)	0.478	0.438	0.578	−2.98	4.32	−2.13	0.974	4.32
Equation (10)	0.536	0.358	0.478	−2.54	2.65	2.68	0.985	3.25
Equation (11)	0.368	0.489	0.623	2.35	4.77	4.32	0.983	3.78
Equation (12)	0.456	0.389	0.457	−3.78	3.87	−3.78	0.957	4.32
Equation (13)	0.478	0.412	0.527	−2.87	4.25	−4.28	0.967	5.32
Equation (14)	0.389	−0.475	0.389	1.35	2.98	4.35	0.981	3.24
Equation (15)	0.547	0.368	0.537	−2.89	3.45	5.29	0.964	5.27