Relative Contribution of the Topographic Influence on the Triangle Approach for Evapotranspiration Estimation over Mountainous Areas

Table 1

A comparison of the daily ET before and after the topographic correction for different terrain aspect angles over the selected area.

Topographic; correction	Daily ET (mm day^−1)		Relative error (RE)
	Before	After
(0–45°)	5.51	4.81	−12.7%
(45°–90°)	5.7	5.12	−10.2%
(90°–135°)	5.48	5.10	−7.0%
(135°–180°)	5.21	4.60	−11.8%
(180°–225°)	5.11	4.12	−19.5%
(225°–270°)	5.30	3.32	−37.3%
(270°–315°)	5.39	3.01	−44.2%
(315°–360°)	5.39	3.91	−27.5%