Weiterentwicklung und Anpassung des nationalen ...

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each metric and for each stream type and are, thus, an integral part of the stream
type-specific approach.
• The Multimetric Index is calculated as the mean of the [0;1] scored values of all
core metrics.
• The Multimetric Index is calculated as the weighted mean of the scores of individual
metrics. The metric “Fauna Index” (LTI in case of Type 21) always accounts for
50% of the final result. Exceptions are the subtypes 6_K and 9.1_K and type 23, for
which the Multimetric Index is calculated as the average of all contributing metrics,
since no Fauna Index has yet been defined.
• The result of the Multimetric Index is always transferred into a quality class by:
high: > 0.8
good: > 0.6-0.8
moderate: > 0.4-0.6
poor: > 0.2-0,4.
bad: