Abstract
Water quality was estimated from 205 samples of benthic invertebrates collected between 1982 and 1986 in 51 rivers of western Switzerland (canton of Vaud). Each sample consisted of the combined list of taxa resulting from one spring sample pooled with one summer sample. Water quality was indicated by total number of taxa and number of taxa intolerant of pollution: i. e. Heptageniidae, Plecoptera, and Trichoptera with a case. Six classes of values were delimited for each of these two variables by cluster analysis. Values from zero to five were attributed to each class. The index of water quality was computed by adding these two values in each sample. According to this index, good water quality was indicated by 42% of samples. This index can be adapted to other rivers because its components are easily modified.
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Lang, C., l'Eplattenier, G. & Reymond, O. Water quality in rivers of western Switzerland: Application of an adaptable index based on benthic invertebrates. Aquatic Science 51, 224–234 (1989). https://doi.org/10.1007/BF00877744
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DOI: https://doi.org/10.1007/BF00877744