Correlation, Regression Analysis, and Spatial Distribution Mapping of WQI for an Urban Lake in Noyyal River Basin in the Textile Capital of India

Table 6

Correlation coefficient for northeast season.

Parameters	pH	EC	TDS	TH	Cl	SO4	Ca	Mg	Na	Turbidity	Fl	K	HCO3	Fe	NO3	DO	BOD	COD
pH	1
EC	−0.042	1
TDS	−0.039	0.999	1
TH	−0.129	0.809	0.81	1
Cl	−0.497	−0.23	−0.23	−0.377	1
SO4	−0.034	0.818	0.82	0.918	−0.563	1
Ca	−0.182	0.679	0.68	0.964	−0.342	0.847	1
Mg	−0.07	0.847	0.87	0.974	−0.386	0.927	0.882	1
Na	0.036	0.853	0.85	0.394	−0.006	0.492	0.212	0.5272	1
Turbidity	−0.269	0.758	0.76	0.393	−0.164	0.528	0.281	0.466	0.808	1
Fl	−0.461	−0.22	−0.22	0.213	0.258	−0.35	−0.201	−0.211	−0.166	0.03	1
K	0.144	0.338	0.34	−0.171	0.044	0.012	−0.322	−0.034	0.672	0.596	−0.351	1
HCO3	0.01	0.942	0.94	0.6644	−0.345	0.739	0.498	0.7683	0.874	0.861	−0.108	0.482	1
Fe	−0.157	0.795	0.8	0.665	−0.457	0.746	0.617	0.669	0.61	0.874	−0.035	0.271	0.842	1
NO3	−0.119	0.046	0.05	−0.001	0.191	−0.223	−0.053	0.042	0.01	0.073	0.3297	0.162	0.13	0.065	1
DO	0.061	−0.79	−0.79	−0.847	0.427	−0.786	−0.791	−0.849	−0.48	−0.53	0.002	0.075	−0.759	−0.704	0.04	1
BOD	0.086	0.432	0.43	0.524	−0.461	0.448	0.472	0.538	0.219	0.232	0.387	−0.36	0.476	0.399	−0	−0.81	1
COD	0.118	0.171	0.17	0.07	−0.57	0.296	0.019	0.109	0.241	0.398	−0.064	0.388	0.314	0.369	−0.3	−0.26	0.35	1