Research Article
Correlation, Regression Analysis, and Spatial Distribution Mapping of WQI for an Urban Lake in Noyyal River Basin in the Textile Capital of India
Table 5
Descriptive statistics of water quality parameters.
| | Variable | N | Nā | Mean | Std. Dev. | Variance | Minimum | Median | Maximum |
| | pH | 10 | 0 | 8.261 | 0.1702 | 0.029 | 7.84 | 8.285 | 8.42 | | EC | 10 | 0 | 1165.2 | 158.3 | 25062 | 1010 | 1089.5 | 1479 | | TDS | 10 | 0 | 814.9 | 110.5 | 12201.9 | 706 | 762 | 1034 | | Total hardness | 10 | 0 | 228.8 | 35.2 | 1240.2 | 184 | 228 | 272 | | Chlorides | 10 | 0 | 138.8 | 18.09 | 327.29 | 104 | 144 | 160 | | Sulphates | 10 | 0 | 97.4 | 18.73 | 350.71 | 71 | 94.5 | 124 | | Calcium | 10 | 0 | 50.08 | 6.66 | 44.4 | 41.6 | 49.6 | 59.2 | | Magnesium | 10 | 0 | 24.86 | 4.71 | 22.21 | 19.2 | 24.48 | 31.68 | | Sodium | 10 | 0 | 138 | 21.81 | 475.56 | 108 | 131 | 190 | | Turbidity | 10 | 0 | 46.3 | 21.02 | 441.79 | 13 | 41.5 | 84 | | Fluoride | 10 | 0 | 0.34 | 0.135 | 0.0182 | 0.2 | 0.4 | 0.6 | | Potassium | 10 | 0 | 16.4 | 5.06 | 25.6 | 10 | 16 | 24 | | Bicarbonate alkalinity | 10 | 0 | 239.6 | 62.3 | 3884.3 | 192 | 210 | 356 | | Iron | 10 | 0 | 1.78 | 0.733 | 0.537 | 1.1 | 1.5 | 3.5 | | Nitrate | 10 | 0 | 10.6 | 1.897 | 3.6 | 8 | 10 | 14 | | DO | 10 | 0 | 5.17 | 0.627 | 0.393 | 4.1 | 5.2 | 6.1 | | BOD | 10 | 0 | 16.42 | 3 | 9 | 12.8 | 16.6 | 20.8 | | COD | 10 | 0 | 29.54 | 4.53 | 20.5 | 20.8 | 30.8 | 34.4 |
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