Figure 1.
Figure 2.
Figure 3.
Figure 4.
Results of statistical analysis for PECQ, PERI, TEC and percentage toxic effect (PE) in bottom sediments of water reservoir Poraj [2]
| Parameter | PECQ | PERI | TEC | PE |
|---|---|---|---|---|
| Mean | 0.38 | 55.35 | 1.39 | 10.85 |
| SD | 0.49 | 87.13 | 1.89 | 12.87 |
| Median | 0.17 | 15.12 | 0.56 | 8.04 |
| Minimum | 0.04 | 4.36 | 0.13 | 0.00 |
| Maximum | 2.08 | 323.62 | 8.00 | 55.52 |
| Skewness | 1.89 | 1.83 | 1.92 | 1.66 |
| Curtosis | 2.60 | 1.85 | 2.74 | 2.65 |
Results of statistical analysis for trace elements in bottom sediments of water reservoir Poraj [2]
| Parameter | Zn | Cd | Pb | Ni | Cu | Cr |
|---|---|---|---|---|---|---|
| [mg·kg-1] | ||||||
| Mean | 461.4 | 1.3 | 50.6 | 11.6 | 17.2 | 31.9 |
| SD | 662.5 | 2.7 | 67.8 | 13.3 | 20.7 | 11.9 |
| Median | 162.2 | < | 16.4 | 5.4 | 8.5 | 29.2 |
| Min | 19.6 | < | 2.4 | 0.0 | 3.0 | 16.7 |
| Max | 3058 | 9.2 | 253 | 45.1 | 105 | 74.9 |
| Skewness | 2.1 | 1.8 | 1.7 | 1.3 | 2.4 | 1.3 |
| Curtosis | 4.4 | 1.7 | 1.5 | 0.2 | 6.1 | 2.1 |
Coefficient of determination calculated between PECQ, PERI, TEC and trace elements of bottom sediments of water reservoir Poraj
| Parameter | PECQ | PERI | TEC |
|---|---|---|---|
| Zn | 0.99 | 0.96 | 0.99 |
| Cd | 0.97 | 0.99 | 0.97 |
| Pb | 0.99 | 0.98 | 0.99 |
| Ni | 0.77 | 0.77 | 0.75 |
| Cu | 0.97 | 0.95 | 0.97 |
| Cr | 0.52 | 0.47 | 0.51 |
Corresponding TEC and PEC values for studied trace elements [10]
| Parameter | Zn | Cd | Pb | Ni | Cu | Cr |
|---|---|---|---|---|---|---|
| PEC | 459 | 5 | 128 | 49 | 149 | 111 |
| TEC | 121 | 1 | 35.8 | 23 | 32 | 43.4 |