Indicator	DO	TN	TDN	NH₃-N	${NO}_{3}^{-}$ -N	${NO}_{2}^{-}$ -N	TP	TDP	${PO}_{4}^{3 -}$	COD	Chl-a
DO	1.000	0.362	−0.232	0.398	−0.241	0.726	−0.683	−0.590	−0.635	−0.754	0.532
TN	0.362	1.000	0.627	0.408	0.374	0.325	0.003	0.349	0.310	−0.320	0.736
TDN	−0.232	0.627	1.000	−0.255	0.898	−0.334	0.574	0.644	0.679	0.504	0.520
NH₃-N	0.398	0.408	−0.255	1.000	−0.602	0.320	−0.237	0.072	−0.019	−0.813	0.253
${NO}_{3}^{-}$ -N	−0.241	0.374	0.898	−0.602	1.000	−0.333	0.564	0.483	0.544	0.670	0.353
${NO}_{2}^{-}$ -N	0.726	0.325	−0.334	0.320	−0.333	1.000	−0.769	−0.531	−0.599	−0.700	0.302
TP	−0.683	0.003	0.574	−0.237	0.564	−0.769	1.000	0.887	0.916	0.631	−0.137
TDP	−0.590	0.349	0.644	0.072	0.483	−0.531	0.887	1.000	0.993	0.383	0.042
${PO}_{4}^{3 -}$	−0.635	0.310	0.679	−0.019	0.544	−0.599	0.916	0.993	1.000	0.470	0.036
COD	−0.754	−0.320	0.504	−0.813	0.670	−0.700	0.631	0.383	0.470	1.000	−0.253
Chl-a	0.532	0.736	0.520	0.253	0.353	0.302	−0.137	0.042	0.036	−0.253	1.000