Table 1 The variation of pH and salinity monthly at six sampling sites

DHTV

7.85 ± 0.02^b

12.33 ± 2.51^ab

CLDST

7.81 ± 0.02^ab

10.42 ± 1.47^a

TDST

7.96 ± 0.06^b

14.00 ± 2.06^ab

HBBL

7.66 ± 0.05^a

18.58 ± 1.47^bc

DHBL

7.81 ± 0.03^ab

23.50 ± 1.48^c

DDCM

7.63 ± 0.05^a

23.17 ± 1.21^c

Shapiro-Wilk test

NJ = 0.96, p < 0.01

NJ = 0.99, p > 0.10

The Levene’s Test

F = 2.26, p = 0.06

One-way ANOVA

F = 10.16, p = 0.02

Kruskal-Wallis H Test

χ² = 29.48, p < 0.01

Month

pH

Salinity

Jul-19

7.78 ± 0.03

12.83 ± 2.65^a

Aug-19

7.87 ± 0.03

11.33 ± 2.80^a

Sep-19

7.93 ± 0.04

11.17 ± 2.51^a

Oct-19

7.77 ± 0.19

11.83 ± 2.39^a

Nov-19

7.73 ± 0.10

13.00 ± 2.68^a

Dec-19

7.77 ± 0.08

15.33 ± 3.07^ab

Jan-20

7.78 ± 0.03

21.83 ± 2.60^ab

Feb-19

7.77 ± 0.04

25.83 ± 2.01^b

Mar-19

7.73 ± 0.03

26.17 ± 2.06^b

Apr-20

7.78 ± 0.05

22.00 ± 2.07^ab

May-20

7.80 ± 0.04

17.33 ± 2.62^ab

Jun-20

7.72 ± 0.07

15.33 ± 2.50^ab

The Levene’s Test

F = 0.62, p = 0.81

One-way ANOVA

F = 0.80, p = 0.00

Kruskal-Wallis H Test

χ² = 11.95, p = 0.37