| Location | Sample No. | Descriptive analysis | |||
| Mean | STD* | Skewness | Kurtosis | ||
| First terrace | 1 | 2.34 | 2.61 | 0.92 | 2.04 |
| 2 | 6.46 | 6.20 | 0.43 | 3.01 | |
| 3 | 6.47 | 5.13 | 0.34 | 1.48 | |
| Second terrace | 4 | 8.84 | 6.13 | 0.01 | 0.16 |
| 5 | 5.99 | 3.02 | 0.85 | 0.22 | |
| 6 | 5.99 | 4.28 | −0.27 | 1.82 | |
| Alluvial plain and the piedmont | 7 | 8.84 | 2.41 | 0.38 | 1.51 |
| 8 | 5.99 | 0.24 | −0.33 | 2.87 | |
| 9 | 5.99 | 2.91 | −0.81 | 0.96 | |
| 10 | 7.89 | 0.76 | 0.47 | 1.96 | |