FAO-56 Penman-Monteith Daily ET_𝑜 from Linear Regression Calibrated Hargreaves Equation with Wind Terms in Tropics with Limited Data

Table 4

Performance parameters of LHGu and LHG against FPM when applied to six different simulated mixed 𝑢₂ data in the range 0.5–6.0 m/s and 2007 weather data for the Accra site.

Parameter	Data A		Data B		Data C		Data D		Data E		Data F
	LHG	LHGu	LHG	LHGu	LHG	LHGu	LHG	LHGu	LHG	LHGu	LHG	LHGu
𝐸1	0.52	0.90	0.55	0.90	0.54	0.90	0.53	0.90	0.53	0.90	0.56	0.91
𝑟^2	0.85	0.98	0.86	0.98	0.86	0.98	0.83	0.98	0.84	0.98	0.85	0.99
Slope	0.71	0.95	0.74	0.95	0.73	0.96	0.74	0.95	0.75	0.96	0.76	0.98
MAE (mm/d)	0.32	0.07	0.28	0.06	0.30	0.06	0.29	0.06	0.28	0.06	0.27	0.05
MBE (mm/d)	−0.23	−0.03	−0.20	−0.02	−0.22	−0.02	−0.19	−0.02	−0.19	−0.02	−0.18	−0.02
MaxAE (mm/d)	1.89	0.80	1.89	0.80	2.05	0.85	1.57	0.67	1.51	0.67	1.39	0.52