WCD Salinity pH DO Ca Mg Cl SO4 PO4 NO2 NO3 Salinity -0.4 1.0                   pH 0.1 0.1 1.0                 DO 0.1 0.0 0.6 1.0               Ca -0.5 0.4 -0.2 -0.2 1.0             Mg -0.3 0.3 -0.2 -0.2 0.3 1.0           Cl -0.3 0.6 -0.1 -0.2 0.3 0.3 1.0         SO4 -0.2 0.1 -0.5 -0.3 0.1 0.2 -0.1 1.0       PO4 -0.2 0.1 0.0 -0.2 -0.2 0.1 0.1 0.2 1.0     NO2 0.1 0.0 0.3 0.2 0.0 -0.1 0.3 -0.1 0.1 1.0   NO3 0.0 -0.1 0.0 -0.1 -0.2 0.0 0.1 0.0 0.2 0.6 1.0 SiO2 0.4 0.0 0.1 0.2 0.0 0.0 -0.1 0.0 0.3 0.1 0.0

Table 2: Matrix of Pearson correlation coefficient for water quality parameters, major ions and inorganic dissolved nutrients concentrations for the selected re-flooded marshes in the Mesopotamia

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