Table 2
Quality levels (very good, good, moderate, insufficient, bad) for ecological evaluation according to the European Water Framework Directive (WFD). The quality levels determined by the study were as follows: cover ratio of habitat-typical vegetation – bad, habitat-typical species – bad, mean lower macrophyte limit – moderate.
| TRS | Very good | Good | Moderate | Insufficient | Bad |
|---|---|---|---|---|---|
| Cover ratio of habitat-typical vegetation | >75% | 50–75% | 10–50% | 5–10% | < 5% |
| Habitat-typical species | >9 | 6–9 | 4–5 | 2–3 | 1–0 |
| Mean lower macrophyte limit | >10 m | >6.5–10.0 m | >5.0–6.5 m | 2.5–5.0 m | <2.5 m |
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