Table 7. Comparison of R², AIC and Moran’s I values between OLS models and spatial regressions.

Water quality parameters		R2	AIC	Moran’s I
NH4 +-N	OLS	0.739	31.813	−0.29
	Spatial lag	0.745	33.546	−0.28
	Spatial error	0.793	29.568	−0.24
SRP	OLS	0.716	−34.402	−0.31
	Spatial lag	0.719	−32.54	−0.28
	Spatial error	0.747	−35.500	−0.24
CODMn	OLS	0.711	67.929	−0.25
	Spatial lag	0.713	69.856	−0.25
	Spatial error	0.763	65.436	−0.12
NO3 –N	OLS	0.767	50.399	0.06
	Spatial lag	0.833	47.305	−0.16
	Spatial error	0.846	45.967	0.12
Cl−	OLS	0.587	113.39	−0.25
	Spatial lag	0.797	106.346	−0.25
	Spatial error	0.707	110.047	0.05
Na+	OLS	0.530	93.660	−0.17
	Spatial lag	0.664	91.319	−0.15
	Spatial error	0.647	90.483	−0.08
Mg2+	OLS	0.360	96.857	−0.41
	Spatial lag	0.365	98.766	−0.39
	Spatial error	0.568	92.963	−0.39
K+	OLS	0.774	65.727	0.09
	Spatial lag	0.869	60.085	−0.24
	Spatial error	0.833	62.930	0.16