Table 3.
Descriptive statistics of input variables for training, testing, and total datasets in the five hydrogeological zones.
| Zone Z1 | Zone Z2 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Variable Name | Statistical parameters | Training set (n = 91) | Testing set (n = 23) | Total data set (n = 114) | Variable Name | Statistical parameters | Training set (n=…) | Testing set (n=…) | Total data set (n=…) |
| Precipitation (mm/month) | Min | 0.00 | 0.00 | 0.00 | Precipitation (mm/month) | Min | 0.00 | 0.00 | 0.00 |
| Max | 72.75 | 47.75 | 72.75 | Max | 71.50 | 61.00 | 71.50 | ||
| Mean | 10.41 | 7.16 | 9.76 | Mean | 12.59 | 10.20 | 12.11 | ||
| Kurtosis | 4.72 | 4.32 | 4.68 | Kurtosis | 2.56 | 5.67 | 2.87 | ||
| Skewness | 2.00 | 2.12 | 2.02 | Skewness | 1.70 | 2.24 | 1.77 | ||
| SD | 14.54 | 12.42 | 14.14 | SD | 17.21 | 14.54 | 16.69 | ||
| Temperature (˚C) | Min | −0.10 | 4.60 | −0.10 | Temperature (˚C) | Min | −1.50 | −0.10 | −1.50 |
| Max | 41.20 | 36.60 | 41.20 | Max | 28.00 | 29.00 | 29.00 | ||
| Mean | 17.00 | 19.33 | 17.47 | Mean | 15.58 | 14.24 | 15.31 | ||
| Kurtosis | −0.20 | −1.07 | −0.50 | Kurtosis | −1.14 | −1.70 | −1.28 | ||
| Skewness | 0.37 | −0.15 | 0.26 | Skewness | −0.24 | 0.08 | −0.17 | ||
| SD | 9.10 | 9.83 | 9.25 | SD | 8.55 | 10.03 | 8.83 | ||
| River Discharge (m 3 /s) | Min | 0.00 | 0.00 | 0.00 | Irrigation Volume (MCM/month) | Min | 0.00 | 0.00 | 0.00 |
| Max | 49.08 | 53.07 | 53.07 | Max | 12.09 | 11.33 | 12.09 | ||
| Mean | 12.50 | 11.83 | 12.36 | Mean | 2.07 | 2.15 | 2.09 | ||
| Kurtosis | −0.65 | −0.03 | −0.58 | Kurtosis | 1.66 | 2.05 | 1.62 | ||
| Skewness | 0.94 | 1.08 | 0.96 | Skewness | 1.45 | 1.53 | 1.45 | ||
| SD | 16.23 | 16.35 | 16.18 | SD | 2.87 | 3.04 | 2.89 | ||
| Groundwater Abstraction (m) | Min | −3.53 | −2.33 | −3.53 | Groundwater Abstraction (m) | Min | −8.99 | −8.76 | −8.99 |
| Max | 3.40 | 3.49 | 3.49 | Max | 7.91 | 4.20 | 7.91 | ||
| Mean | −0.09 | −0.02 | −0.08 | Mean | −0.25 | −0.27 | −0.25 | ||
| Kurtosis | 1.84 | 1.90 | 1.76 | Kurtosis | 0.38 | 1.31 | 0.51 | ||
| Skewness | 0.09 | 1.05 | 0.31 | Skewness | −0.11 | −1.06 | −0.32 | ||
| SD | 1.17 | 1.29 | 1.19 | SD | 2.86 | 3.09 | 2.89 | ||
| Groundwater Level (m) | Min | 1600.08 | 1600.28 | 1600.08 | Groundwater Level (m) | Min | 1543.93 | 1547.62 | 1543.93 |
| Max | 1610.56 | 1610.29 | 1610.56 | Max | 1578.31 | 1575.30 | 1578.31 | ||
| Mean | 1603.91 | 1603.27 | 1603.78 | Mean | 1557.89 | 1559.36 | 1558.18 | ||
| Kurtosis | −0.27 | 0.60 | −0.20 | Kurtosis | −0.10 | −0.60 | −0.23 | ||
| Skewness | 0.47 | 1.06 | 0.57 | Skewness | 0.54 | 0.16 | 0.46 | ||
| SD | 2.55 | 2.98 | 2.64 | SD | 7.84 | 7.17 | 7.70 | ||
| Zone Z3 | Zone Z4 | ||||||||
| Precipitation (mm/month) | Min | 2.99 | 6.07 | 2.99 | Precipitation (mm/month) | Min | 4.00 | 2.99 | 2.99 |
| Max | 32.83 | 33.24 | 33.24 | Max | 33.24 | 32.27 | 33.24 | ||
| Mean | 18.20 | 22.24 | 19.01 | Mean | 19.27 | 17.92 | 19.01 | ||
| Kurtosis | −1.47 | −1.44 | −1.46 | Kurtosis | −1.49 | −1.24 | −1.46 | ||
| Skewness | 0.00 | −0.35 | −0.05 | Skewness | −0.11 | 0.17 | −0.05 | ||
| SD | 9.27 | 9.38 | 9.40 | SD | 9.53 | 8.95 | 9.40 | ||
| Temperature (˚C) | Min | 0.00 | 0.00 | 0.00 | Temperature (˚C) | Min | 0.00 | 0.00 | 0.00 |
| Max | 66.50 | 74.00 | 74.00 | Max | 74.00 | 66.50 | 74.00 | ||
| Mean | 10.73 | 8.99 | 10.39 | Mean | 9.13 | 15.48 | 10.39 | ||
| Kurtosis | 2.58 | 7.17 | 3.56 | Kurtosis | 5.20 | 0.82 | 3.56 | ||
| Skewness | 1.71 | 2.64 | 1.92 | Skewness | 2.18 | 1.26 | 1.92 | ||
| SD | 15.05 | 17.91 | 15.60 | SD | 14.42 | 19.17 | 15.60 | ||
| Irrigation Volume (MCM/month) | Min | 0.00 | 0.00 | 0.00 | Irrigation Volume (MCM/month) | Min | 0.00 | 0.00 | 0.00 |
| Max | 40.23 | 26.28 | 40.23 | Max | 6.81 | 9.97 | 9.97 | ||
| Mean | 7.77 | 7.12 | 7.64 | Mean | 1.02 | 1.39 | 1.09 | ||
| Kurtosis | 0.93 | −0.10 | 0.97 | Kurtosis | 4.01 | 9.03 | 9.42 | ||
| Skewness | 1.32 | 0.91 | 1.29 | Skewness | 1.69 | 2.62 | 2.41 | ||
| SD | 10.57 | 8.32 | 10.13 | SD | 1.32 | 2.20 | 1.53 | ||
| Groundwater Abstraction (m) | Min | −5.15 | −6.91 | −6.91 | Groundwater Abstraction (m) | Min | −0.95 | −0.28 | −0.95 |
| Max | 6.35 | 6.30 | 6.35 | Max | 0.44 | 0.48 | 0.48 | ||
| Mean | 0.05 | −0.21 | 0.00 | Mean | −0.01 | 0.00 | −0.01 | ||
| Kurtosis | 2.53 | 3.33 | 2.98 | Kurtosis | 6.42 | 2.60 | 6.10 | ||
| Skewness | 0.45 | −0.03 | 0.23 | Skewness | −1.66 | 1.28 | −1.27 | ||
| SD | 1.76 | 2.39 | 1.89 | SD | 0.18 | 0.16 | 0.18 | ||
| Groundwater Level (m) | Min | 1570.70 | 1571.14 | 1570.70 | Groundwater Level (m) | Min | 1732.14 | 1732.17 | 1732.14 |
| Max | 1580.99 | 1579.47 | 1580.99 | Max | 1733.42 | 1733.62 | 1733.62 | ||
| Mean | 1573.60 | 1573.78 | 1573.64 | Mean | 1732.83 | 1732.90 | 1732.84 | ||
| Kurtosis | −0.20 | 0.01 | −0.20 | Kurtosis | 0.13 | −0.24 | 0.29 | ||
| Skewness | 0.92 | 0.85 | 0.90 | Skewness | −0.15 | −0.08 | −0.01 | ||
| SD | 2.60 | 2.33 | 2.54 | SD | 0.23 | 0.36 | 0.26 | ||
| Zone Z5 | |||||||||
| Precipitation (mm/month) | Min | 0.00 | 0.00 | 0.00 | Temperature (˚C) | Min | 1.06 | 1.10 | 1.06 |
| Max | 77.70 | 67.00 | 77.70 | Max | 29.54 | 29.94 | 29.94 | ||
| Mean | 10.81 | 12.23 | 11.10 | Mean | 15.53 | 17.38 | 15.89 | ||
| Kurtosis | 3.95 | 3.09 | 3.57 | Kurtosis | −1.51 | −1.18 | −1.46 | ||
| Skewness | 2.01 | 1.67 | 1.92 | Skewness | 0.04 | −0.31 | −0.01 | ||
| SD | 16.48 | 16.94 | 16.51 | SD | 9.20 | 9.58 | 9.27 | ||
| Groundwater Level (m) | Min | 1838.19 | 1838.26 | 1838.19 | Kurtosis | −1.01 | −1.23 | −0.92 | |
| Max | 1840.18 | 1840.24 | 1840.24 | Skewness | 0.23 | 0.13 | 0.28 | ||
| Mean | 1838.92 | 1839.09 | 1838.95 | SD | 0.50 | 0.65 | 0.53 | ||