Spatial Interpolation of Annual Runoff in Ungauged Basins Based on the Improved Information Diffusion Model Using a Genetic Algorithm

Table 3

The RMSE, , , and MAPE of five different models in Lanzhou site and Lijin site (where boldface font indicates the best performance).

Site	Model	RMSE			MAPE
Lanzhou	IDW	12.39	0.8571	0.7426	41.36%
	COK	11.32	0.8897	0.7918	35.71%
	SIDM	10.72	0.9016	0.8127	32.65%
	OIDM	10.19	0.9089	0.8194	29.71%
	GIDM	6.48	0.9367	0.8457	12.33%
Lijin	IDW	10.26	0.7983	0.6860	52.73%
	COK	9.07	0.8258	0.7169	43.34%
	SIDM	9.01	0.8617	0.7607	41.28%
	OIDM	8.25	0.8865	0.7815	36.45%
	GIDM	5.97	0.9260	0.8213	18.42%
The average	IDW	11.325	0.8277	0.7143	47.05%
	COK	10.195	0.85775	0.75435	39.53%
	SIDM	9.865	0.88165	0.7867	36.97%
	OIDM	9.22	0.8977	0.80045	33.08%
	GIDM	6.225	0.9314	0.8335	15.38%