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Updated: Jun 27, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

Linking biological and physicochemical water quality.

Waldemar Bernatowicz¹, Annett Weiss, Jörg Matschullat

¹Interdisciplinary Environmental Research Centre, TU Bergakademie Freiberg, Brennhausgasse 14, 09599, Freiberg, Germany. bernatowicz@geogr.uni.wroc.pl

Environmental Monitoring and Assessment

|December 11, 2008

Summary

The European Water Framework Directive requires complex water quality assessments. This study found the Saprobic Index, based on macroinvertebrates, is a sensitive indicator for correlating with chemical parameters in stream quality evaluations.

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Area of Science:

Environmental Science
Ecology
Water Resource Management

Background:

The European Water Framework Directive (WFD) mandates comprehensive water quality assessments using physicochemical, biological, and hydromorphological indicators.
Biological assessments are central to WFD, with hydrochemistry playing a supporting role, necessitating an evaluation of their interrelationships.

Purpose of the Study:

To identify and test the relationships between biological and chemical parameters for improving water quality assessment efficiency.
To evaluate the effectiveness of the Saprobic Index in correlating with chemical parameters for integrated stream assessment.

Main Methods:

Analysis of data from the Weisseritz catchment (Germany and Czech Republic) from 1992-2003.
Application of accepted German methods, WFD quality standards, and novel biological assessment methods.
Statistical correlation analysis comparing selected chemical parameters with different versions of the German Saprobic Index based on macroinvertebrate taxa.

Main Results:

Significant relationships were found between biological and chemical parameters.
Nutrients (e.g., total nitrogen), salinity (e.g., conductivity), and microelements (e.g., calcium) showed the strongest correlations.
The Saprobic Index demonstrated high sensitivity in correlating with various chemical parameters.

Conclusions:

The Saprobic Index is a highly sensitive indicator for assessing stream ecological quality in relation to chemical parameters.
Integrated assessment systems utilizing macroinvertebrate-based indices can effectively complement hydrochemical monitoring under WFD.