Indices classification and relative thresholds. HS (Hydrological Stability); IPS (Specific Polluosensitivity Index), TI (Trophic Index); ICMi (Intercalibration Common Metric Index). M1 = Mediterranean macrotypology; small streams, mean altitude; M4 = Mediterranean macrotypology; mean dimension streams, mountain; M5 = Mediterranean macrotypology; intermittent streams.
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