Open Access
Table 1
Physio-chemical properties of water and type of substrates at the sampling sites.
| Oder River | Gliwice Canal | Kłodnica River | |||||
|---|---|---|---|---|---|---|---|
| I | II | III | IV | V | VI | VII | |
| Parameter | 50°44.827'N 17°51.396'E |
50°24.708'N 18°06.435'E |
50°20.187'N 18°09.124'E |
50°16.679'N 18°12.812'E |
50°21.521'N 18°09.615'E |
50°36.318'N 18°21.046'E |
50°20.257'N 18°10.861'E |
| Temperature (°C) | 12.8 | 18.3 | 19.4 | 18.1 | 24.5 | 25.4 | 21.9 |
| Oxygen (mg O2 dm−3) | 9.10 | 5.28 | 10.9 | 9.45 | 10.41 | 4.26 | 7.78 |
| Oxygenation (%) | 85.8 | 57.8 | 92.8 | 103.3 | 128.7 | 53.2 | 91.5 |
| pH | 7.8 | 7.4 | 8.1 | 7.8 | 7.9 | 7.5 | 7.8 |
| Alkalinity (mg CaCO₃ dm−3) | 126 | 125 | 135 | 120 | 165 | 180 | 225 |
| Salinity (PSU) | 1.2 | 1.3 | 1.1 | 2.0 | 2.5 | 2.9 | |
| Conductivity (μS cm−1) | 1581 | 2370 | 2550 | 2250 | 3800 | 4630 | 5340 |
| Chlorides (mg Cl− dm−3) | 333 | 490 | 468 | 481 | 1020 | 1520 | 1390 |
| Sulphates (mg SO42− dm−3) | 112 | 134 | 114 | 97 | 296 | 380 | 412 |
| Potassium (mg K dm−3) | 8.6 | 8.6 | 7.4 | 10.4 | 18.4 | 20 | |
| Total hardness (mg CaCO₃ dm−3) | 251 | 310 | 325 | 315 | 430 | 510 | 505 |
| Calcium (mg Ca dm−3) | 67 | 80 | 75 | 73 | 98 | 112 | 120 |
| Magnesium (mg Mg dm−3) | 20.5 | 26.8 | 33.5 | 32.2 | 45.0 | 56.0 | 49.9 |
| Nitrite Nitrogen (mg NO2−N dm−3) | 0.10 | 0.04 | 0.04 | 0.02 | 0.02 | 0.03 | |
| Nitrate Nitrogen (mg NO3−N dm−3) | 2.3 | 1.6 | 3.0 | 1.7 | 0.8 | 0.4 | 2.0 |
| Ammonium Nitrogen (mg NH4−N dm−3) | 0.29 | 0.54 | 0.21 | 0.37 | 0.37 | 0.36 | 0.29 |
| Phosphate (mg PO43− dm−3) | 0.43 | 0.47 | 0.36 | 0.35 | 0.47 | 0.51 | 0.47 |
| Iron (mg Fe dm−3) | 0.01 | 0.34 | 0.78 | 0.63 | 0.13 | 0.32 | 0.45 |
| Type of substrate | Sandy and gravel | Sandy with silt | Sandy with silt | Sandy and stones with silt | Empty shells of zebra mussels | Stones with silt | Sandy and stones |
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