Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Integrated risk assessment for WFD ecological status classification applied to Llobregat river basin (Spain). Part I - Fuzzy approach to aggregate biological indicators
Autor Gottardo, S.; Semenzin, E.; Giove, S.; Zabeo, A.; Critto, A.; de Zwart, D.; Ginebreda, A.; Marcomini, A.;
Journal / Serie Science of the Total Environment
Erscheinungsjahr 2011
Department WANA;
Band/Volume 409
Heft 22
Sprache englisch;
Keywords Water Framework Directive; Risk assessment; Weight of evidence; Fuzzy logic; Ecological status; Water Framework Directive; Risk Assessment; Weight of Evidence; Ecological Status; Environmental quality indicators
Abstract

Many indicators and indices related to a variety of biological, physico-chemical, chemical, and hydromorphological water conditions have been recently developed or adapted by scientists in order to support water managers in the Water Framework Directive (WFD) implementation. In this context, the achievement of a comprehensive and reliable Ecological Status classification of water bodies across Europe is hampered by the lack of harmonised procedures for selecting an appropriate set of indicators and integrating heterogeneous information in a flexible way.

To this purpose, an Integrated Risk Assessment (IRA)2 methodology was developed based on the Weight of Evidence approach. This method analyses and combines a set of environmental indicators grouped into five Lines of Evidence (LoE), i.e. Biology, Chemistry, Ecotoxicology, Physico-chemistry and Hydromorphology. The whole IRA methodology has been implemented as a specific module into a freeware GIS (Geographic Information System)-based Decision Support System, named MODELKEY DSS. This paper focuses on the evaluation of the four supporting LoE (i.e. Chemistry, Ecotoxicology, Physico-chemistry and Hydromorphology), and includes a procedure for a comparison of each indicator with proper thresholds and a subsequent integration process to combine the obtained output with the LoE Biology results in order to provide a single score expressing the Ecological Status classification. The approach supports the identification of the most prominent stressors, which are responsible for the observed alterations in the river basin under investigation. The results provided by the preliminary testing of the IRA methodology through application of the MODELKEY DSS to the Llobregat case study are finally reported and discussed.

ID 11613
dauerhafte UFZ-Verlinkung http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=11613
Gottardo, S., Semenzin, E., Giove, S., Zabeo, A., Critto, A., de Zwart, D., Ginebreda, A., Marcomini, A. (2011):
Integrated risk assessment for WFD ecological status classification applied to Llobregat river basin (Spain). Part I - Fuzzy approach to aggregate biological indicators
Sci. Total Environ. 409 (22), 4701 - 4712