Research Article

Geochemical Characterization of Spring Waters in the Crati River Basin, Calabria (Southern Italy)

Table 2

Results of the cross-validation for the different subzones and the different variables.

SubzonesVariableModelMEMSDR

Pollino MassifCalciumCircular-0.0250.940
MagnesiumExponential-0.0200.963
SodiumSpherical-0.0131.092
PotassiumGaussian0.0010.786
ChlorideExponential-0.0171.078
SulphateExponential-0.0651.009
NitrateExponential0.0150.945
AlkalinityGaussian-0.0161.249
HardnessExponential0.0180.866
ConductivitySpherical-0.0170.947

Coastal ChainCalciumGaussian-0.0491.214
MagnesiumGaussian-0.1061.440
SodiumGaussian-0.0480.920
PotassiumGaussian-0.0331.224
ChlorideGaussian0.0000.812
SulphateExponential-0.0601.583
NitrateSpherical-0.1171.381
AlkalinityExponential-0.0831.062
HardnessCircular-0.0681.327
ConductivityExponential-0.1091.266

Mt. CocuzzoCalciumExponential0.0210.784
MagnesiumExponential-0.0021.100
SodiumCircular0.0240.941
PotassiumExponential0.0170.984
ChlorideGaussian0.0090.857
SulphateGaussian0.0520.875
NitrateExponential0.0080.959
AlkalinityGaussian-0.0111.015
HardnessCircular0.0070.775
ConductivityGaussian0.0001.044

Serre AreaCalciumGaussian-0.0160.505
MagnesiumGaussian-0.0220.222
SodiumExponential-0.0061.221
PotassiumGaussian-0.0170.385
ChlorideGaussian-0.0350.536
SulphateGaussian-0.0230.201
NitrateGaussian0.0360.484
AlkalinityGaussian-0.0220.152
HardnessCircular0.0760.977
ConductivityGaussian-0.0230.150

Sila MassifCalciumExponential-0.0411.045
MagnesiumExponential-0.0271.082
SodiumExponential-0.0131.079
PotassiumGaussian0.0221.050
ChlorideCircular0.0011.071
SulphateGaussian0.0081.019
NitrateGaussian0.0330.891
AlkalinityExponential-0.0350.996
HardnessExponential-0.0191.222
ConductivityGaussian0.0171.086