DE

Stations

Aguigadji

Ahlan

Sele

Toho

Rainy season

Dry season

Rainy season

Dry season

Rainy season

Dry season

Rainy season

Dry season

Zn

44.31 ± 2.82

31.92 ± 6.21

45.70 ± 0.88

30.64 ± 3.98

33.49 ± 2.54

31.2 ± 4.88

0.06 ± 0.02

0.02 ± 0.008

Cd

3.02 ± 0.40

2.32 ± 0.08

3.00 ± 0.56

2.12 ± 0.03

2.10 ± 0.64

1.97 ± 0.35

nd

0.06 ± 0.05

As

1.76 ± 0.96

0.4 ± 0.25

5.08 ± 3.10

0.45 ± 0.32

0.27 ± 0.24

0.18 ± 0.04

nd

0.03 ± 0.03

Pb

265.96 ± 21.02

255.38 ± 79.09

235.70 ± 25.94

231.48 ± 20.04

209.05 ± 12.74

188.67 ± 34.41

0.43 ± 0.34

0.24 ± 0.17

Mn

33.57 ± 13.79

2.22 ± 1.29

28.70 ± 4.79

2.63 ± 0.88

0.4 ± 0.35

0.04 ± 0.29

nd

nd

Ni

57.05 ± 3.34

53.35 ± 8.01

61.98 ± 11.22

56.88 ± 3.01

15.07 ± 4.93

11.50 ± 1.12

0.06 ± 0.03

0.03 ± 0.02

Fe

32.02 ± 0.80

26.01 ± 4.32

28.29 ± 6.39

25.38 ± 4.67

31.45 ± 1.58

23.85 ± 0.95

0.07 ± 0.004

0.05 ± 0.34

Hg

0.25 ± 0.10

0.04 ± 0.005

0.46 ± 0.22

0.08 ± 0.001

0.43 ± 0.40

0.03 ± 0.02

nd

nd

Cu

26.54 ± 1.92

18.31 ± 5.58

26.94 ± 2.04

25.19 ± 4.66

30.35 ± 2.37

31.25 ± 0.98

0.05 ± 0.02

0.02 ± 0.008

Cr

30.4 ± 1.25

28.06 ± 1.96

29.04 ± 2.93

28.31 ± 5.45

79.31 ± 7.001

29.64 ± 9.63

nd

nd