Open Access

Table 1

Physico-chemical parameters and their variability in Lake Qarun during 2008–2013 (Seasonal average/CVs)*.

Season Temp., Transp., Salinity, pH DO, BOD, COD, CO3, HCO3,
°C cm g.L-1 mg.L-1 mg.L-1 mg.L-1 mg.L-1 mg.L-1
2008
Spring 25.7/0.02 34.4/0.02 8.4/0.01 8.5/0.20 5.1/0.19 19.5/0.07 18.1/0.23 284.8/0.01

Summer 29.0/0.06 34.5/0.02 8.4/0.01 6.7/0.15 4.9/0.13 19.7/0.10 16.6/0.17 277.1/0.03

Autumn 15.5/0.02 34.4/0.03 8.3/0.01 8.6/0.07 6.6/0.09 13.5/0.05 9.2/0.10 234.0/0.05

2009

Winter 20.7/0.02 32.8/0.03 8.4/0.01 8.7/0.10 5.2/0.20 14.1/0.06 14.6/0.10 252.9/0.02

2011

Summer 27.8/0.03 106.0/0.42 32.7/0.24 8.4/0.02 9.1/0.11 4.1/0.27 14.2/0.21 34.9/0.31 158.3/0.28

Autumn 17.8/0.04 98.0/0.39 33.1/0.24 8.3/0.01 7.4/0.10 3.7/0.21 14.2/0.19 13.5/0.70 203.4/0.18

2012

Spring 25.7/0.04 55.0/0.22 30.6/0.18 8.2/0.01 10.1/0.13 8.2/0.18 9.8/0.15 38.3/0.37 204.7/0.12

Summer 28.6/0.06 81.5/0.49 34.4/0.19 8.1/0.04 6.5/0.23 4.9/0.11 19.3/0.11 36.8/0.43 224.5/0.08

Autumn 21.0/0.03 116.5/0.27 32.9/0.21 8.3/0.02 8.1/0.31 4.0/0.46 6.6/0.05 25.9/0.23 176.3/0.11

2013

Winter 15.4/0.07 77.5/0.34 32.7/0.04 8.7/0.03 12.2/0.3 4.4/0.60 9.8/0.14 48.0/0.39 214.7/0.12

Spring 21.8/0.04 65.5/0.24 31.4/0.10 8.5/0.02 7.8/0.17 5.1/0.28 7.3/0.18 42.3/0.23 246.4/0.11

Note: *Seasonal average – average value for all ten stations; CVs – coefficient of spatial variability.

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