Rainfall Variability, Drought Characterization, and Efficacy of Rainfall Data Reconstruction: Case of Eastern Kenya

Table 7

Mean absolute error, RMSE, and values for the interpolation produced from validation of IDW, Kriging, and Spline methods.

	IDW	Kriging	Spline
Average P (O)	371.3 (760)	507.6 (760)	399.4 (760)
SD	115.5	137.5	106.7
MAE	276.7	147.6	248.6
RMSE (mm)	294.7	176.5	264.7
	0.04	0.67	0.23

P: predicted precipitation; O: Observed precipitation; SD: standard deviation; MAE: mean absolute error; RMSE: root mean square error; IDW: inverse weighted mean.