Period

Sampling zones

River

Estuarine

coastal

15-Jan-14

5.30 ± 0.17

5.09*

0.55 ± 0.06

24-Apr-14

5.16 ± 0.17

4.95*

0.39 ± 0.05

17-Jul-14

3.50 ± 0.48

1.86 ± 0.23

0.13 ± 0.03