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)	0.258	0.655	−	−3.36	2.98	3.21	0.962	3.25
Equation (8)	0.369	0.295	0.356	−5.24	4.11	2.89	0.958	3.65
Equation (9)	0.325	0.524	0.425	3.56	3.65	1.89	0.981	2.47
Equation (10)	0.478	0.411	0.395	4.23	3.92	3.78	0.952	4.32
Equation (11)	0.452	0.389	0.524	−3.85	2.57	2.58	0.991	2.21
Equation (12)	0.524	0.256	0.358	−2.85	3.21	4.25	0.974	3.65
Equation (13)	0.385	0.489	0.411	−3.47	2.56	−3.78	0.959	4.25
Equation (14)	0.289	−0.532	0.368	2.54	1.98	5.34	0.978	3.27
Equation (15)	0.411	−0.467	0.489	−4.21	3.71	4.75	0.968	4.77