Table 1.

Correlation coefficient matrix for each water quality index.

Item	pH	EC	DO	BOD	TP	NO3-N	NO2-N	NH3-N	NTU	SS
pH	1	−0.008	−0.589	0.172	−0.469	0.523	0.456	0.419	0.266	0.136
EC		1.000	−0.331	0.334	0.229	−0.640	−0.573	−0.652	−0.330	0.378
DO			1.000	−0.272	0.389	−0.354	−0.214	−0.236	−0.035	−0.253
BOD				1.000	−0.141	−0.133	−0.001	−0.192	0.017	0.491
TP					1.000	−0.589	−0.446	−0.486	−0.202	0.144
NO3-N						1.000	0.825	0.902	0.451	−0.059
NO2-N							1.000	0.801	0.772	0.055
NH3-N								1.000	0.662	−0.006
NTU									1.000	0.216
SS										1.000