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Evaluation of Quality of Bottom Sediments of Water Reservoir Poraj by Applying Sediment Quality Guidelines and Spiatal Analysis


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Figure 1.

Water reservoir Poraj with the location of the measurement points
Water reservoir Poraj with the location of the measurement points

Figure 2.

Total nitrogen content in the regression line for the organic matter content. R2=0.9336
Total nitrogen content in the regression line for the organic matter content. R2=0.9336

Figure 3.

Classified spatial distribution of mean PECQ and PERI of bottom sediments of water reservoir Poraj
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
Classified spatial distribution of TEC of bottom sediments of water reservoir Poraj

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
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