Research Article

Rainfall-Altitude Relationship in Saudi Arabia

Table 2

Coefficient of determination ( ) derived by GWR, percentage of over- and under estimated rainfall stations and percentage of rainfall stations with positive parameter estimate.

Seasons GWR ( )No. of overestimated stations/total (%) No. of underestimated stations/total (%) No. of stations with positive parameter estimate/total (%)

Annual 0.78*,**2/180 (1.11%)4/180 (2.22%) 153/180 (85%)
Winter 0.64*,**3/180 (1.66%) 3/180 (1.66%) 114/180 (63%)
Spring0.83*,**2/180 (1.11%)4/180 (2.22%)166/180 (92%)
Summer0.82*,**3/180 (1.66%)4/180 (2.22%) 139/180 (77%)
Fall0.71*,**4/180 (2.22%) 3/180 (1.66%)125/180 (69%)

Random standardized residuals (−1.96 < -score < 1.96), Condition number < 30.