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

Table 4

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

Site	Model	RMSE	R	E	MAPE
Lanzhou	IDW	14.26	0.8324	0.7269	47.59%
	COK	13.14	0.8496	0.7348	43.88%
	SIDM	11.86	0.8807	0.7715	39.39%
	OIDM	10.94	0.8914	0.7952	35.28%
	GIDM	7.93	0.9183	0.8274	18.45%
Huayuankou	IDW	14.41	0.8376	0.7213	45.60%
	COK	12.31	0.8783	0.7762	38.15%
	SIDM	12.35	0.8718	0.7723	38.63%
	OIDM	10.84	0.9008	0.8016	34.18%
	GIDM	8.07	0.9243	0.8317	26.67%
Lijin	IDW	11.17	0.7916	0.6817	54.54%
	COK	11.45	0.8341	0.7258	54.89%
	SIDM	9.6	0.8516	0.742	43.63%
	OIDM	7.31	0.9083	0.8062	25.38%
	GIDM	11.17	0.7916	0.6817	54.54%
The average	IDW	14.13	0.8072	0.7015	51.19%
	COK	12.21	0.8398	0.7309	44.19%
	SIDM	11.89	0.8622	0.7565	44.97%
	OIDM	10.46	0.8813	0.7796	37.36%
	GIDM	7.77	0.9170	0.8218	20.50%