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Table 4

PCA outcomes for the analysed faecal-associated parameters and physicochemical data demonstrating that principal component one (PC1) represents variables highly influenced by rainfall-induced runoff, while PC2 and PC3 represent biogeochemical components

 ParameterCorrelation coefficients (r)
PC1PC2PC3
Temperature 0.09 0.84 0.16 
pH −0.21 0.12 0.60 
Dissolved oxygen − 0.66 0.13 −0.04 
Conductivity −0.39 0.78 −0.22 
Total phosphorus 0.89 0.01 0.18 
Orthophosphate 0.89 0.03 −0.17 
Nitrate 0.22 −0.33 0.81 
Total suspended solids 0.54 −0.15 0.65 
E. coli 0.93 −0.04 −0.02 
ENT 0.89 −0.09 0.08 
CP 0.69 0.27 0.15 
Faecal pellet 0.82 0.12 −0.19 
Explained variance (%) 41 19 11 
 ParameterCorrelation coefficients (r)
PC1PC2PC3
Temperature 0.09 0.84 0.16 
pH −0.21 0.12 0.60 
Dissolved oxygen − 0.66 0.13 −0.04 
Conductivity −0.39 0.78 −0.22 
Total phosphorus 0.89 0.01 0.18 
Orthophosphate 0.89 0.03 −0.17 
Nitrate 0.22 −0.33 0.81 
Total suspended solids 0.54 −0.15 0.65 
E. coli 0.93 −0.04 −0.02 
ENT 0.89 −0.09 0.08 
CP 0.69 0.27 0.15 
Faecal pellet 0.82 0.12 −0.19 
Explained variance (%) 41 19 11 

Values in bold are significant at p < 0.05.

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