To obtain suitable biological methods for evaluating water quality several methods were applied to the macroinvertebrate composition of streams in the southern region of the province of Limburg (the Netherlands). After evaluation of the results through comparison followed by elimination of unsuitable methods (e.g. Trent Biotic Index, Indice Biotique, Indice de Qualiteé Biologique Globale) four methods remained promising: the Saprobic-index, the Quality-index, the BMWP-aspt and the Chandler-aspt. A further selection of methods must be carried out in combination with a typological classification of the streams concerned, including a description of the achievable range for each method. To this end more research in the field of stream typology is needed, especially for the province of Limburg with its high diversity of streams.
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Harry H. Tolkamp (1985) studied this question.