Table 2.

Mean values for the evaluated metrics in the cross-validation step. The highest values for $R^2$ are presented in boldface.

		Unisinos		Broa
		Chl-a	TSS	Chl-a	TSS
Linear regression	$R^2$	0.31521	0.22380	0.35389	0.39648
	$MSE$	0.03642	0.04681	0.01642	0.01345
LASSO	$R^2$	0.31517	0.22379	0.35126	0.39457
	$MSE$	0.03643	0.04681	0.01649	0.01349
KNN	$R^2$	0.89644	0.85111	0.76172	0.72900
	$MSE$	0.00549	0.00895	0.00607	0.00602
SVR	$R^2$	0.63457	0.56024	0.41329	0.42219
	$MSE$	0.01942	0.02650	0.01491	0.01290
RF	$R^2$	0.90012	0.85603	0.82338	0.81371
	$MSE$	0.00531	0.00867	0.00450	0.00415
ANN	$R^2$	0.90138	0.85371	0.72573	0.67819
	$MSE$	0.00524	0.00882	0.00700	0.00719