Forecasting Daily and Monthly Reference Evapotranspiration in the Aidoghmoush Basin Using Multilayer Perceptron Coupled with Water Wave Optimization

Table 1

Statistical characteristics for ET: monthly and daily values.

	ET	Maximum (mm)	Minimum (mm)	Coefficient of variation (mm)	Average (mm)
Monthly values	January	18	10	0.23	14
	February	17	12	0.20	15
	March	52	34	0.45	39
	April	89	45	0.56	52
	May	112	90	0.91	104
	June	224	209	1.01	212
	July	232	223	1.04	228
	August	145	138	0.98	142
	September	132	112	1.01	129
	October	98	91	0.65	95
	November	89	82	0.55	85
	December	67	54	0.72	59
Daily values	Train
	Value	24	12	0.32	18
	Test
	Value	21	14	0.45	19