Table 6.

Descriptive statistics (means and standard deviations) of the performance measures of models optimized with GA in the test set.

DA	Estimator	R	WI	RMSE	MAE	MAPE	NSE	KGE
1	ELM	0.960 (0.005)	0.979 (0.003)	0.184 (0.012)	0.118 (0.002)	6.91 (0.140)	0.914 (0.012)	0.944 (0.008)
	EN	0.966 (0.00)	0.982 (0.00)	0.168 (0.00)	0.112 (0.00)	6.51 (0.008)	0.929 (0.00)	0.957 (0.00)
	MARS	0.975 (0.00)	0.987 (0.00)	0.144 (0.00)	0.099 (0.00)	5.84 (0.038)	0.948 (0.00)	0.961 (0.002)
	SVR	0.978 (0.003)	0.987 (0.002)	0.143 (0.012)	0.113 (0.012)	6.88 (0.790)	0.947 (0.009)	0.952 (0.010)
	XGB	0.979 (0.00)	0.989 (0.00)	0.131 (0.003)	0.094 (0.003)	5.64 (0.160)	0.956 (0.002)	0.976 (0.002)
3	ELM	0.961 (0.003)	0.979 (0.002)	0.186 (0.007)	0.121 (0.002)	7.06 (0.138)	0.912 (0.007)	0.935 (0.005)
	EN	0.965 (0.00)	0.981 (0.00)	0.175 (0.00)	0.115 (0.00)	6.63 (0.011)	0.923 (0.00)	0.945 (0.00)
	MARS	0.971 (0.003)	0.985 (0.002)	0.154 (0.009)	0.096 (0.00)	5.66 (0.039)	0.939 (0.007)	0.956 (0.004)
	SVR	0.977 (0.002)	0.987 (0.002)	0.147 (0.011)	0.114 (0.011)	6.89 (0.711)	0.945 (0.008)	0.947 (0.012)
	XGB	0.981 (0.00)	0.990 (0.00)	0.126 (0.003)	0.096 (0.002)	5.78 (0.085)	0.960 (0.002)	0.974 (0.002)
5	ELM	0.941 (0.005)	0.968 (0.003)	0.231 (0.010)	0.151 (0.002)	8.72 (0.161)	0.865 (0.013)	0.907 (0.008)
	EN	0.945 (0.00)	0.970 (0.00)	0.220 (0.00)	0.146 (0.00)	8.33 (0.026)	0.877 (0.00)	0.918 (0.001)
	MARS	0.955 (0.002)	0.976 (0.001)	0.195 (0.005)	0.135 (0.002)	7.85 (0.122)	0.903 (0.005)	0.934 (0.005)
	SVR	0.955 (0.002)	0.974 (0.002)	0.210 (0.008)	0.150 (0.009)	8.85 (0.532)	0.888 (0.009)	0.899 (0.010)
	XGB	0.960 (0.00)	0.979 (0.00)	0.184 (0.002)	0.138 (0.002)	8.22 (0.124)	0.914 (0.002)	0.945 (0.005)
7	ELM	0.896 (0.004)	0.943 (0.003)	0.306 (0.007)	0.196 (0.003)	11.32 (0.236)	0.763 (0.011)	0.867 (0.007)
	EN	0.903 (0.00)	0.948 (0.00)	0.290 (0.00)	0.188 (0.00)	10.69 (0.032)	0.786 (0.001)	0.883 (0.001)
	MARS	0.901 (0.022)	0.946 (0.014)	0.299 (0.034)	0.191 (0.003)	10.99 (0.161)	0.771 (0.066)	0.866 (0.028)
	SVR	0.915 (0.004)	0.951 (0.003)	0.289 (0.009)	0.185 (0.003)	10.71 (0.226)	0.787 (0.013)	0.853 (0.009)
	XGB	0.922 (0.004)	0.958 (0.003)	0.262 (0.010)	0.187 (0.004)	10.98 (0.193)	0.826 (0.013)	0.897 (0.009)