Water Quality Class * according to the Regulation of the Minister of the Environment from 22 October 2014 (Dz. U. No 0, pos. 1482). |
Ecological status | SPI | GDI | TDI | Trophic state |
---|---|---|---|---|---|
I | high | > 17 | > 17 | <35 | oligotrophic |
II | good | 15-17 | 14-17 | 35-50 | oligo/mesotrophic |
III | moderate | 12-15 | 11-14 | 50-60 | mesotrophic |
IV | poor | 8-12 | 8-11 | 60-75 | eutrophic |
V | bad | <8 | <8 | >75 | hypertrophic |
Parameter | Unit | Site | |||
---|---|---|---|---|---|
1 |
2 |
3 |
4 |
||
Insolation | high | high | high | high | |
Bottom | stony | stony | stones and silt | stones and silt | |
Width | m | ca 35 | ca 60 | ca 50 | ca 35 |
Temperature | °C | 2-20 | 3-21 | 2-21 | 2-22 |
pH | 6.5-7.7 | 6.7-7.6 | 6.6-7.5 | 6.6-7.5 | |
Conductivity | µS cm-1 | 364-463 | 404-451 | 372-450 | 423-480 |
Cl- | mg l-1 | 9.43-9.54 | 5.70-10.31 | 6.78-10.29 | 7.80-11.45 |
NO2,-N | 0.18-0.22 | 0.12-0.25 | 0.11-0.19 | <0.15 | |
NO3-N | 1.41-3.83 | 1.61-2.20 | 1.65-2.69 | 1.51-2.82 | |
SO,42- | 33.54-33.90 | 21.85-35.96 | 25.35-35.81 | 27.51-38.31 |