Ecological and Environmental Change Research Group


There has not been added a translated version of this content. You can either try searching or go to the "area" home page to see if you can find the information there
MSc project

Defining lake reference states

Gaute Velle


Defining reference states for lakes in Norway

  • The ecological quality status of all waters should be assessed according to the EU water framework directory
  • The status classes are defined by their deviation from a reference level
  • The reference, pre-perturbation conditions are often lacking or arbitrarily set
  • Therefore the reference state needs to be defined

Using palaeolimnological methods, especially chironomid analysis, the status of the lake can be traced back in time to give a reference baseline status.


Definere referansetilstand for innsjøer i Norge

  • Den økologiske kvaliteten status for alle farvann bør vurderes i henhold til EU water framework directory
  • Status klasser er definert av deres avvik fra en referanse-nivå
  • Referanse, pre-perturbasjons forholdene ofte mangler eller vilkårlig satt
  • Referansetilstand må derfor defineres

Ved hjelp av palaeolimnological metoder, spesielt chironomid analyse, kan statusen til insjø føres tilbake i tid for å gi et referansetilstand.