Water Variables

Ecological sites

Mean

(n =50)

F-Value

LSD_0.05

^*Egyptian law No. 48/1982

Site 1 (n = 20)

Site 2 (n = 20)

Site 3 (n = 10)

Depth (cm)

5.69^b ± 184.39

b176.98^b ± 7.07

218.79^a ± 12.88

133.82 ± 68.11

6.18

29.49^**

-

Temp. (˚C)

30.25^a ± 0.38

30.26^a ± 0.34

22.86^a ± 0.32

27.79 ± 0.35

90.40

1.37^***

-

pH

7.76^a ± 0.08

7.93^a ± 0.06

7.96a ± 0.03

7.88 ± 0.06

1.36

0.25ns

7 - 8.5

EC (μmhos/cm)

323.63^a ± 18.72

626.05^b ± 17.66

18663.20^a±382.01

938.63 ± 139.46

2241.93

643.38^***

-

DO

mg/l

10.40^b ± 0.52

10.82^b ± 0.34

13.32^a ± 0.42

11.51 ± 0.43

5.92

1.98^**

≥5 mg/l

BOD

9.78^b ± 1.48

23.29^a ± 1.95

12.86^b ± 1.92

15.31 ± 1.78

10.03

6.89^***

≤6 mg/l

COD

26.37^b ± 3.93

69.87^a ± 6.36

13.20^b ± 0.70

36.48 ± 3.66

31.91

16.93^***

≤10 mg/l

Cl⁻

664.58^c ± 151.56

1403.81^b ± 184.33

6526.58^a ± 385.88

2864.99 ± 240.59

111.80

870.19^***

-

2557.80^b ± 604.79

4075.33^a ± 1118.28

3582.24^ab ± 305.0

3405.12 ± 676.02

2.72

3526.76ns

≤200

244.18^c ± 19.70

759.95^b ± 116.01

4142.68^a ± 275.47

1715.60 ± 137.06

125.49

537.70^***

<200 mg/l

CaCO₃

105.44^b ± 3.81

164.99^a ± 4.60

161.05^a ± 7.54

143.83 ± 5.32

37.24

16.64^***

50 - 200 mg/l

T.N

2.68^b ± 0.10

3.14^a ± 0.11

0.72^c ± 0.10

2.18 ± 0.1

129.01

0.35^***

-

T.P

1.46^b ± 0.05

2.16^a ± 0.06

1.33^b ± 0.05

1.65 ± 0.05

32.87

0.24^***

-

Na⁺

245.46^b ± 55.82

491.05^b ± 72.45

4405.43^a ± 302.76

1713.98 ± 143.68

151.11

560.16^***

-

K⁺

34.28^b ± 5.02

59.49^b ± 7.53

519.94^a ± 35.35

204.57 ± 15.97

159.02

63.79^***

-

Ca²⁺

32.19^b ± 8.92

63.50^b ± 18.94

1135.50^a ± 78.29

410.40 ± 35.38

167.57

141.17^***

-

Mg²⁺

28.42^b ± 4.43

57.34^b± 8.02

445.72^a ± 41.53

177.16 ± 17.99

85.68

74.0^***

-

SAR

27.52^b ± 5.15

45.90^b ± 5.17

155.91^a ± 4.82

76.44 ± 5.05

106.16

20.35^***

-

PAR

3.89^b ± 0.58

5.46^b ± 0.61

18.17^a ± 0.55

9.17 ± 0.58

102.81

2.30^***

-

WQI

59.28

44.28

60

-

-

-

-