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  • Drinking water shortage (level « orange »)

  • Drinking water shortage (level « red »)

  • Overall evaluation of the hydromorphological status per surface water body. It is a “pessimistic assessment” because only the worst of the two parameters morphology an continuity is retained. The hydromorphological status is assessed in 5 classes.

  • According to the water framework directive WFD(DIR 2000/60/CE), important physico chemical parameters are measured in the surface water bodies for the assessment of the ecological status. The modalities for this monitoring are stated in the grand ducal Regulation of 30 December 2010 (règlement grand-ducal you 30 décembre 2010 concernant l 'évaluation of the dimension d' eau de surface).

  • Chemical status of the water bodies 2009

  • According to the water framework directive (Directive 2000/60/CE), the biological parameter fish are monitored in surface water bodies in order to determine the ecological status. Fish react sensitively to the continuity and the hydrological flow of surface water. Fish are therefor sampled in the SWB which have deficits here. The methodology applied for sampling is the standard NF EN 14962:2006 "water quality − guidance on the scope and selection of fish sampling methods".

  • The surface water typology was determined on the basis of geographical , geological, morphological and hydrological characteristics. The Luxembourgish surface water typology comprises six types. For all six types the reference conditions, which would be achieved if there were no anthropogenic pressures impacting surface waters, are described in fact sheets. The reference conditions correspond to the high status of surface water bodies.

  • The ecological status of the natural waterbodies is assessed in 5 classes going from 1 to 5 (high, good, moderate, poor, bad). The classification of the ecological status is based on the biological quality elements, physico-chemical quality elements and in some cases also the hydromorphological quality elements.

  • A groundwater body is a distinctive volume of groundwater inside one or more aquifers. The identification of a groundwater body is made by geological criteria. A groundwater body is a management unit in order to evaluate the environmental objectives (good status) according to article 6 of the national water law of the 19th December 2008.

  • According to the Water Framework Directive (Directive 2000/60/EC ), macrophytes and diatoms are monitored as two sub-elements of the aquatic flora. Macrophytes are particularly sensitive to organic pollution, trophy and hydromorphology. The diatom assemblages are different in function of concentrations of nutrients and organic pollutants.