Table 6.
Descriptive statistics of running water hydrochemistry
| Parameter | Tomickie | Trzcielińskie | Witobelskie | Łódzko-Dymaczewskie | Wielkowiejskie | Chomęcicko-Rosnowskie | Lipno | Jarosławieckie |
|---|---|---|---|---|---|---|---|---|
| Hardness (mval · dm−3) | 293.1 ± 0.0 | 439.38 ± 116.14 | 280.26 ± 127.87 | 359.03 ± 141.33 | 418.53 ± 3.571 | 495.95 ± 186.46 | ND | ND |
| pH | 7.7 ± 0.76 | 8.1 ± 0.24 | 7.40 ± 0.63 | 25.23 ± 37.59 | 7.94 ± 0.38 | 7.67 ± 0.49 | 7.96 | 7.27 ± 0.33 |
| Conductivity (μS · cm−1) | 738 ± 103 | 1011 ± 339 | 746 ± 97 | 771 ± 107 | 800 ± 87 | 1025 ± 241 | 922.00 | 676 ± 818 |
| Alkalinity (mg CaCO3 · dm−3) | 213.75 ± 37.12 | 251.25 ± 72.48 | 256.75 ± 52.32 | 213.44 ± 62.47 | 296.25 ± 68.94 | 236.67 ± 42.62 | 335.00 | 171.5 ± 19.09 |
| COD (mg O2 · dm−3) | 41.00 ± 2.55 | 29.35 ± 9.69 | 42.88 ± 19.55 | 46.49 ± 26.28 | 23.20 ± 2.12 | 30.88 ± 15.86 | 16.9 | 34.3 ± 3.11 |
| Phosphates (mg PO4 3−-P · dm−3) | 0.40 ± 0.06 | 0.61 ± 0.28 | 0.49 ± 0.41 | 0.75 ± 0.68 | 0.49 ± 0.25 | 0.63 ± 0.58 | 0.59 | 0.33 ± 0.21 |
| Total phosphorus (mg PO4 3− -P · dm−3) | 0.7 ± 0.03 | 0.81 ± 0.10 | 0.98 ± 0.65 | 1.16 ± 0.81 | 0.66 ± 0.11 | 0.94 ± 0.66 | 0.65 | 0.66 ± 0.18 |
| Nitrites (mg NO2 −-N · dm−3) | 0.05 ± 0.04 | 0.15 ± 0.18 | 0.02 ± 0.01 | 0.07 ± 0.08 | 0.012 ± 0.01 | 0.22 ± 0.25 | 0.01 | 0.01 ± 0.00 |
| Nitrates (mg NO3 −-N · dm−3) | 1.15 ± 0.92 | 36.95 ± 50.98 | 0.69 ± 0.46 | 4.63 ± 8.45 | 5.2 ± 2.69 | 8.14 ± 11.23 | 3.3 | 0.1 ± 0.14 |
| Ammonium (mg NH4 −-N · dm−3) | 0.32 ± 0.29 | 0.93 ± 1.12 | 0.40 ± 0.32 | 0.42 ± 0.80 | 0.10 ± 0.03 | 0.26 ± 0.15 | 0.1 | 0.24 ± 0.09 |
| Organic nitrogen (mg NH4 −-N · dm−3) | 1.66 ± 0.27 | 1.55 ± 1.74 | 3.08 ± 1.85 | 3.24 ± 2.11 | 2.64 ± 0.70 | 2.01 ± 0.92 | 0.99 | 1.99 ± 0.63 |
| Kjeldahl nitrogen (mg N · dm−3) | 1.97 ± 0.02 | 2.48 ± 0.62 | 3.48 ± 2.09 | 3.66 ± 2.66 | 2.74 ± 0.67 | 2.26 ± 0.99 | 1.09 | 2.23 ± 0.53 |
| Total nitrogen (mg N · dm−3) | 3.17 ± 0.86 | 40.69 ± 52.12 | 4.30 ± 2.05 | 8.38 ± 9.50 | 7.31 ± 2.46 | 10.85 ± 11.09 | 4.4 | 2.33 ± 0.40 |
| Sulfates (mg SO4 2− · dm−3) | 91 ± 7.07 | 108 ± 11.31 | 69.5 ± 26.53 | 70.31 ± 21.20 | 110.00 ± 31.11 | 94.00 ± 34.69 | 134.00 | 79.00 ± 1.41 |
| Chlorides (mg Cl− · dm−3) | 33.35 ± 13.08 | 35.55 ± 18.88 | 33.48 ± 17.95 | 33.48 ± 17.18 | 35.85 ± 20.58 | 41.70 ± 22.50 | 45.2 | 123.2 ± 9.62 |
| Calcium (mg Ca2+ · dm−3) | 98.67 ± 22.25 | 140.14 ± 32.36 | 94.44 ± 15.91 | 91.03 ± 26.25 | 82.91 ± 12.18 | 133.23 ± 44.55 | 64.35 | 74.36 ± 10.11 |
| Magnesium (mg Mg+2 · dm−3) | 9.09 ± 10.41 | 21.65 ± 8.57 | 34.43 ± 26.44 | 24.60 ± 15.36 | 45.03 ± 2.46 | 36.77 ± 14.10 | 75.34 | 21.65 ± 2.45 |
| Oxygen (mg O2 · dm−3) | 8.25 ± | 14.2 ± 6.51 | 5.91 ± 3.29 | 8.76 ± 5.49 | 9.42 ± 6.19 | 10.45 ± 7.50 | 9.76 | 4.8 ± 1.75 |
ND no data