Parameter/Trial | 1 | 2 | 3 |

K (sandstone), (m/d) | 20 | 34 | 70 |

K (clay) (m/d) | 0.2 | 0.2 | 0.3 |

Max. residual (m) | 5.282 | −3.037 | −9.476 |

Min. residual (m) | −0.092 | −0.013 | −0.009 |

Residual mean (m) | −1.072 | −0.65 | −0.332 |

Absolute residual mean (m) | 1.5 | 0.871 | 1.042 |

Standard error of the estimate (m) | 0.147 | 0.077 | 0.15 |

Root mean squared (m) | 1.894 | 1.048 | 1.631 |

Correlation coefficient | 0.920 | 0.923 | 0.902 |