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

Table 7

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

Site	Model	RMSE			MAPE
Lanzhou	IDW	13.12	0.8551	0.7417	42.89%
	COK	11.29	0.8704	0.7658	34.52%
	SIDM	11.16	0.8913	0.7928	34.11%
	OIDM	8.88	0.9146	0.8108	27.59%
	GIDM	6.55	0.9344	0.8215	12.41%
Lijin	IDW	11.76	0.7857	0.678	55.15%
	COK	9.51	0.846	0.7401	43.54%
	SIDM	9.33	0.8773	0.776	42.44%
	OIDM	8.78	0.9104	0.8008	37.69%
	GIDM	6.67	0.9355	0.8298	21.55%
Hongqi	IDW	7.44	0.8567	0.7428	105.18%
	COK	6.43	0.8807	0.7701	92.74%
	SIDM	6.77	0.8924	0.7815	93.45%
	OIDM	5.23	0.9158	0.8103	64.98%
	GIDM	4.35	0.9344	0.8318	41.51%
The average	IDW	10.77	0.8325	0.7208	67.74%
	COK	9.08	0.8657	0.7587	56.93%
	SIDM	9.09	0.8870	0.7834	56.67%
	OIDM	7.63	0.9136	0.8073	43.42%
	GIDM	5.86	0.9348	0.8277	25.16%