The correlation coefficient of all water table in observation wells shows that most values are close to 1, which means all wells have a positive and a high correlation (Table 1). The lowest correlation coefficient value is 0.74 occurred in the correlation of well 7 and well 13, where both wells have the longest distance from each other.
Logarithmic data transformation is utilized to get a better skewness value, as shown in Table 2. Figure 4 shows that skewness values are slightly better after logarithmic data transformation.