The European Water Framework Directive (WFD) requires the national classifications of good ecological status to be harmonised through an intercalibration exercise. In this exercise, significant differences in status classification among Member States are harmonized by comparing and, if necessary, adjusting the good status boundaries of the national assessment methods.
Intercalibration is performed for rivers, lakes, coastal and transitional waters, focusing on selected types of water bodies (intercalibration types), anthropogenic pressures and Biological Quality Elements. Intercalibration exercises were carried out in Geographical Intercalibration Groups - larger geographical units including Member States with similar water body types - and followed the procedure described in the WFD Common Implementation Strategy Guidance document on the intercalibration process (European Commission, 2011).
The Technical reports are organized in volumes according to the water category (rivers, lakes, coastal and transitional waters), Biological Quality Element and Geographical Intercalibration group. This volume addresses the intercalibration of the Northern Lake GIG Fish fauna ecological assessment methods.
Two countries (Norway and Sweden) participated in the intercalibration exercise and harmonised their lake fish fauna systems. The results were approved by the WG ECOSTAT and included in the EC Decision on intercalibration (European Commission, 2018).
HOLMGREN Kerstin;
KINNERBACK Andres;
SVENSSON Jonas;
SANDLUND Odd Terje;
HESTHAGEN T.;
SAKSGARD Randi;
SANDOY Steinar;
POIKANE Sandra;
2018-12-06
Publications Office of the European Union
JRC112702
978-92-79-92967-0 (print),
978-92-79-92966-3,
1018-5593 (print),
1831-9424 (online),
EUR 29335 EN,
OP KJ-NA-29335-EN-C (print),
OP KJ-NA-29335-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC112702,
10.2760/554870 (print),
10.2760/79933 (online),
