项目 | 含量范围 | 均值 | 污染指数范围 | 均值 |
pH | 7.80~8.07 | 7.91 | 0.23~1.00 | 0.69 |
DO (mg∙L−1) | 6.67~7.29 | 7.04 | 0.20~0.42 | 0.29 |
COD (mg∙L−1) | 1.90~2.89 | 2.46 | 0.63~0.96 | 0.82 |
无机氮(mg∙L−1) | 0.354~0.439 | 0.406 | 1.18~1.46 | 1.35 |
活性磷酸盐(mg∙L−1) | 0.00252~0.0393 | 0.00328 | 0.08~0.13 | 0.11 |
总氮(mg∙L−1) | 0.00103~0.00126 | 0.00111 | — | — |
总磷(mg∙L−1) | 0.0391~0.0752 | 0.0500 | — | — |
叶绿素a (mg∙L−1) | 5.97~17.0 | 11.5 | — | — |