Figure 1.
Water reservoir Poraj with the location of the measurement points
Table 1.
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 |
Figure 2.
Total nitrogen content in the regression line for the organic matter content. R2=0.9336
Table 2.
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 |
Table 3.
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 |
Figure 3.
Classified spatial distribution of mean PECQ and PERI of bottom sediments of water reservoir Poraj
Figure 4.
Classified spatial distribution of TEC of bottom sediments of water reservoir Poraj