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

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