监测 项目 | 5月 | 8月 | 10月 | |||
变化范围 | 均值 | 变化范围 | 均值 | 变化范围 | 均值 | |
pH | 7.89~7.94 | 7.92 | 7.86~7.91 | 7.89 | 8.01~8.04 | 8.03 |
盐度 | 29.104~29.671 | 29.427 | 27.797~28.393 | 27.938 | 21.142~27.816 | 25.383 |
COD | 2.35~2.74 | 2.55 | 1.23~2.06 | 1.69 | 1.47~1.94 | 1.71 |
BOD5 | 1.99~2.54 | 2.26 | 1.13~1.76 | 1.54 | 1.98~2.50 | 2.29 |
悬浮物 | 13.0~17.4 | 15.5 | 15.4~21.7 | 17.9 | 13.8~20.6 | 17.2 |
无机氮 | 0.603~0.931 | 0.770 | 0.648~0.844 | 0.759 | 0.351~0.891 | 0.601 |
磷酸盐 | 0.0291~0.0630 | 0.0425 | 0.0406~0.0563 | 0.0486 | 0.0449~0.152 | 0.0865 |
石油类 | 0.0255~0.0491 | 0.0389 | 0.0234~0.0447 | 0.0372 | 0.0182~0.0491 | 0.0308 |
砷 | 0.00285~0.00331 | 0.00304 | 0.00203~0.00264 | 0.00233 | 0.00193~0.00255 | 0.00226 |