The authors regret that Figure 4 was incorrect in their original paper and apologise for any inconvenience caused. The correct version of the figure can be found below.
Figure 4

RMSE and the WRSS errors for 30 models at the end of steady-state and transient modes of automatic calibration. Errors calculated between simulated and observed water levels of 18 observation wells.

Figure 4

RMSE and the WRSS errors for 30 models at the end of steady-state and transient modes of automatic calibration. Errors calculated between simulated and observed water levels of 18 observation wells.