S/N

Parameter

Unit

WATER LEVEL

ANOVA

Surface

(n = 30)

Mean ± S.E.

Mid-depth

(n = 20)

Mean ± S.E.

Bottom

(n = 26)

Mean ± S.E.

F

P

1

Water-Temperature

˚C

29.7 ± 0.3

27.5 ± 0.3

27.5 ± 0.3

18.640

2.88 × 10−7***

2

Apparent-Colour

Pt-Co

420.3 ± 59.4

406.9 ± 34.4

749.6 ± 85.2

8.494

0.0005***

3

True-Colour

Pt-Co

122.3 ± 11.8

166.0 ± 17.8

210.2 ± 25.2

6.011

0.004**

4

Turbidity

NTU

31.1 ± 5.9

25.9 ± 2.8

62.9 ± 7.7

10.230

0.0001***

5

Total Suspended Solids (TSS)

mgL−1

135.0 ± 22.7

103.5 ± 9.7

205.4 ± 22.6

5.810

0.005**

6

Total Solids (TS)

mgL−1

194.3 ± 23.1

156.5 ± 10.6

261.2 ± 22.6

5.759

0.005**

7

pH

0 - 14

6.64 ± 0.05

6.44 ± 0.04

6.27 ± 0.04

18.26

3.71 × 10−7***

8

Conductivity

µScm−1

83.90 ± 3.73

79.30 ± 3.60

82.27 ± 4.02

0.338

0.715

9

Total Dissolved Solids (TDS)

mgL−1

55.33 ± 2.17

52.50 ± 2.39

55.00 ± 2.88

0.336

0.716

10

Total-Alkalinity

mgCaCO3L−1

21.50 ± 0.88

23.00 ± 0.51

21.90 ± 0.87

0.840

0.436

11

Total-Hardness

mgCaCO3L−1

11.29 ± 0.90

11.49 ± 0.77

11.76 ± 0.96

0.074

0.928

12

Total-Acidity

mgCaCO3L−1

10.87 ± 0.75

12.20 ± 1.17

16.69 ± 1.17

9.612

0.0002***

13

Calcium ion (Ca2+)

mgL−1

3.85 ± 0.28

3.95 ± 0.27

4.02 ± 0.32

0.088

0.916

15

Magnesium ion (Mg2+)

mgL−1

0.40 ± 0.06

0.39 ± 0.07

0.40 ± 0.08

0.008

0.992

16

Sodium ion (Na+)

mgL−1

6.44 ± 0.19

6.06 ± 0.17

6.16 ± 0.16

1.269

0.287

17

Potassium ion (K+)

mgL−1

2.50 ± 0.19

2.42 ± 0.21

2.45 ± 0.20

0.036

0.964

18

Bicarbonate ion ( HCO 3 1 )

mgL−1

25.80 ± 1.10

27.60 ± 0.60

26.20 ± 1.00

0.840

0.436

19

Chloride ion (Cl−1)

mgL−1

4.20 ± 0.23

4.22 ± 0.20

4.49 ± 0.22

0.552

0.578

20

Sulphate ion ( SO 4 2 )

mgL−1

4.49 ± 0.30

4.98 ± 0.31

4.71 ± 0.22

0.713

0.493

21

Dissolved Oxygen (DO)

mgL−1

5.61±0.24

3.52 ± 0.25

2.35 ± 0.23

50.650

1.6 × 10−14***

22

Dissolved Oxygen Saturation

%

73.74 ± 3.13

44.55 ± 3.10

29.69 ± 2.91

58.190

7.7 × 10−16***

23

Biochemical Oxygen Demand (BOD5)

mgL−1

5.71 ± 0.55

2.81 ± 0.23

2.98 ± 0.61

9.869

0.0002***

24

Organic-Matter (OM)

mgL−1

7.38 ± 0.64

6.90 ± 0.74

8.77 ± 0.65

2.029

0.139

25

Nitrate ion ( NO 3 )

mgL−1

1.16 ± 0.14

0.91 ± 0.05

1.39 ± 0.16

2.813

0.067

26

Phosphate ( PO 4 3 )

mgL−1

0.23 ± 0.01

0.20 ± 0.02

0.23 ± 0.02

0.433

0.651