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    • Biological intercalibration: Invertebrates 1006 (ICP Waters report 85/2006) 

      Raddum, G.; Fjelheim, A. (NIVA-rapport;5314, Research report, 2006-12)

    • Biological intercalibration: Invertebrates 1107 (ICP Waters report 91/2008) 

      Fjellheim, A.; Raddum, G.G. (NIVA-rapport;5551, Research report, 2008-02)

    • Biological intercalibration: Invertebrates 1208 (ICP Waters report 95/2008) 

      Fjellheim, A.; Raddum. G.G. (NIVA-rapport;5706, Research report, 2008-11)

    • Biological intercalibration: Invertebrates 1309 (ICP Waters report 99/2009) 

      Fjellheim, Arne (NIVA-rapport;5883, Research report, 2009-12)
      The 13th intercalibration of invertebrates in the ICP Waters programme had contribution from six laboratories. The laboratories identified a high portion of the individuals in the test samples, usually > 90% of the total ...

    • Biological intercalibration: Invertebrates 1410 (ICP Waters report 103/2010) 

      Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;6087, Research report, 2010-11)
      The 14th intercalibration of invertebrates in the ICP Waters programme had contribution from five laboratories. The laboratories identified a high portion of the individuals in the test samples, usually > 90% of the total ...

    • Biological intercalibration: Invertebrates 1511 (ICP Waters report 109/2011) 

      Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;6264, Research report, 2011-12)
      The 15th intercalibration of invertebrates in the ICP Waters programme had contribution from four laboratories. The laboratories identified a high portion of the individuals in the test samples, usually > 90% of the total ...

    • Biological intercalibration: Invertebrates 1612 (ICP Waters report 113/2012) 

      Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;6454, Research report, 2012-11)
      The 16th intercalibration of invertebrates in the ICP Waters programme had contribution from three laboratories. The laboratories identified a high portion of the individuals in the test samples, usually > 90% of the total ...

    • Biological intercalibration: Invertebrates 1713 (ICP Waters report 118/2014) 

      Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik; de Wit, Heleen (NIVA-rapport;6662, Research report, 2014-04)
      The 17th intercalibration of invertebrates in the ICP Waters programme had contribution from four laboratories. The laboratories identified a very high portion of the individuals in the test samples, usually > 95% of the ...

    • Biological intercalibration: Invertebrates 1814 

      Fjellheim, Arne; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;6761, Research report, 2014)
      The 18th intercalibration of invertebrates in the ICP Waters programme had contribution from three laboratories. The laboratories identified a very high portion of the individuals in the test samples, > 95% of the total ...

    • Biological intercalibration: Invertebrates 2016. ICP Waters report 130/2016 

      Halvorsen, Godtfred Anker; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7089, Research report, 2016-11)
      Two European laboratories participated in the 20th ICP Waters biological intercalibration, which took place in 2016. The laboratories identified a high proportion of the individuals in the test samples, 93 % of the total ...

    • Biological intercalibration: Invertebrates 2017 

      Halvorsen, Godtfred Anker; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7198, Research report, 2017)
      The 21th intercalibration of invertebrates in the ICP Waters programme had contribution from four laboratories. The biological intercalibration is important for harmonizing taxonomic work across countries and will be of ...

    • Biological intercalibration: Invertebrates 2018 

      Velle, Gaute; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7314, Research report, 2018)
      The 22nd biological intercalibration of invertebrates in the ICP Waters programme included four laboratories. The intercalibration is important for harmonising taxonomic work across countries, and is of high value in ...

    • Biological intercalibration: Invertebrates 2019 

      Velle, Gaute; Birkeland, Ina Bakke; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7433, Research report, 2019)
      Two laboratories participated in the 23rd biological intercalibration of invertebrates in the ICP Waters programme. The intercalibration is important for harmonising taxonomic work across countries and is of high value ...

    • Biological intercalibration: Invertebrates 2020 

      Velle, Gaute; Birkeland, Ina Bakke; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7556, Report, 2020)
      The 24th biological intercalibration of invertebrates in ICP Waters included three laboratories. The intercalibration is important for harmonizing taxonomic work across countries, to ensure high quality data in the ICP ...

    • Biological intercalibration: Invertebrates 2021 

      Bodin, Christian Lucien; Velle, Gaute; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7685, Research report, 2021)
      The 25th biological intercalibration of invertebrates in ICP Waters included three participants. The intercalibration is important for harmonizing taxonomic work across countries, to ensure high quality data in the ICP ...

    • Biological intercalibration: Invertebrates 2022 

      Bodin, Christian Lucien; Velle, Gaute; Landås, Torunn Svanevik; Kalvø, Daniel (NIVA-rapport;7840-2023, Research report, 2023)
      The ICP Waters biological intercalibration of invertebrates was executed to harmonise taxonomic work across countries and is of high value in programmes where the focus is on community analyses, e.g., for the classification ...

    • Biological intercalibration: Invertebrates 2023 

      Bodin, Christian Lucien; Velle, Gaute; Landås, Torunn Svanevik (NIVA-rapport;7927-2024, Report, 2024)
      The ICP Waters biological intercalibration of invertebrates was executed to harmonise taxonomic work across countries and is of high value in programmes where the focus is on community analyses, e.g., for the classification ...

    • Biologisk bedømmelse av vannkvalitet i Lyseren 

      Skulberg, O. (NIVA-rapport;0906, Research report, 1977)
      Lukt- og smaksproblemer i drikkevannsforsyningen fra Lyseren til Spydeberg.

    • Biologisk befaring i Vrengensundet, Tjøme. August 1986 

      Bokn, T. (NIVA-rapport;1936, Research report, 1986)
      Ved befaring i Vrengensundet i august 1986 ble 20 arter/slekter registrert, hvorav 12 fastsittende alger. Algeartsantallet var noe redusert i selve Vrengen i forhold til øst- og vestsiden. Det var størst likhet mellom ...

    • Biologisk befaringsundersøkelse av Hunnselva i 1993 

      Kjellberg, G. (NIVA-rapport;3050, Research report, 1994)
      Målet for befaringsundersøkelsen var å kartlegge dagens forurensningssituasjon i Hunnselva på strekningen Raufoss - Mjøsa. Strekningen er forsatt belastet med kloakk- og industriavløp. Tidligere var forholdene her så dårlige ...