Blar i NIVA Open Access Archive på forfatter "Wright, R."

Viser treff 41-60 av 70

    • Otra 1981. Rutineovervåking 

      Grande, M.; Wright, R.; Brettum, P.; Lindgaard, T.; Romstad, R. (NIVA-rapport;1426, Research report, 1982)
      Også i 1981 var forurensningen av Otra påvirket av 4 hovedfaktorer - reguleringsinngrep, sur nedbør, eutrofiering og industrielle avløpsvann. I strekninger med sterkt redusert vannføring ved Valle var kjemiske og biologiske ...

    • Otra 1982. Rutineovervåking 

      Wright, R.; Grande, M.; Brettum, P.; Løvik, J.; Romstad, R.; Martinsen, K. (NIVA-rapport;1500, Research report, 1983)
      Også i 1982 var forurensningen i Otra påvirket av fire hovedfaktorer - reguleringsinngrep, sur nedbør, eutrofiering og industrielt avløpsvann. I 1982 var nedgangen i pH i Otra ved passering av treforedlingsbedriftene ...

    • Otra 1983. Rutineovervåking 

      Grande, M.; Wright, R. (NIVA-rapport;1655, Research report, 1984)
      Vannkvaliteten i Otra var i 1983 som 1982 særlig påvirket av sur nedbør, industrielt avløpsvann og reguleringsinngrep. Vannet er surt ovenfor Vennesla og blir ytterligere forsuret etter utslipp fra industribedriftene i ...

    • Overview of areas sensitive to acidification: Europe 

      Wright, R.; Skjelkvåle, B.L. (NIVA-rapport;2405, Research report, 1990)
      We present here an overview of the geographical extent of areas in Europe sensitive to acidification due to acid deposition. Information on water sensitivity comes from a variety of detailed national maps of water chemistry, ...

    • Predicting acidification of North American lakes 

      Wright, R. (NIVA-rapport;1477, Research report, 1983)
      An empirical model for lake acidification developed in Norway also satisfactorily accounts for observed water chemistry in oligotrophic clearwater, softwater lakes elsewhere in Europe and in North America. This model can ...

    • Rain project. Annual report for 1984 

      Wright, R. (NIVA-rapport;1707, Research report, 1985)
      Project Rain is a 5-year international research project aimwed at investigation the effects on water chemistry of changing acid deposition to whole catchments. The project comprices 2 paralell largescale experimental ...

    • RAIN project. Annual report for 1985 

      Wright, R.; Gjessing, E. (NIVA-rapport;1855, Research report, 1986)
      The acid addition (Sogndal) and acid exclusion (Risdalsheia) experiments continued in 1985, which was the second year of treatment. At Sogndal runoff continued to respond as in 1984 with dramatic decreases in pH accompanied ...

    • Rain project. Annual report for 1986 

      Wright, R. (NIVA-rapport;2025, Research report, 1987)
      Experiments with acid addition at Sogndal and acid exclusion at Risdalsheia continued in 1986, the third year of treatment. At Sogndal runoff exhibited chronic acidification between the acid pulses at each dose. About 30% ...

    • RAIN project. Annual report for 1987 

      Wright, R. (NIVA-rapport;2119, Research report, 1988)
      The RAIN project (Reversing Acidification in Norway) is an international research project aimed at investigating the effect on water and soil chemistry of changing acid deposition to whole catchment. The results from 1987 ...

    • RAIN project. Data report 1983-85 

      Wright, R.; Gjessing, E.; Semb, A.; Sletaune, B. (NIVA-rapport;1857, Research report, 1986)
      This report contains lists of data on precipitation and runoff volume and chemical composition at the rain catchments during the period 1983-85.

    • RAIN PROJECT. Report for the years 1988, 1989 and 1990 

      Wright, R. (NIVA-rapport;2557, Research report, 1991)
      The Rain Project encompasses 7 years of catchment-scale experiments with acid addition at Sogndal and acid exclution at Risdalsheia. At Sogndal runoff contains increasingly higher concentrations of SO4 and NO3 these are ...

    • RAIN project: Risdalsheia data report for June 1990-May 1994 

      Wright, R. (NIVA-rapport;3177, Research report, 1994)
      This report lists precipitation and runoff data collected at Risdalsheia as part of the RAIN project.

    • Referanseverdier for forsuringsfølsomme kjemiske støtteparametre 

      Wright, R.; Cosby, B. Jack (NIVA-rapport;6388, Research report, 2012)
      I Veilederen 1:2009 «Klassifisering av miljøtilstand i vann» oppgis referanseverdier for vannkjemiske forsuringsparametre for innsjøer. Disse verdiene er trolig for høye. I denne undersøkelsen har to modeller (MAGIC og ...

    • Regional survey of freshwater acidification in West Germany (FRG) 

      Schoen, R.; Wright, R.; Krieter, M. (NIVA-rapport;1623, Research report, 1983)
      A survey of 78 lakes and streams in 9 sensitive regions of the Federal Republic of Germany and 1 in western France was conducted in March - April 1983 and December 1981, respectively. The waters show high to extreme ...

    • Reversibility of acidification: Soils and surface waters 

      Wright, R.; Hauhs, M. (NIVA-rapport;2479, Research report, 1990)
      Recent declining levels of acid deposition in both North America and Europe have initiated reversal of acidification and recovery of impacted ecosystems. The reversibility of acidification has also been investigated by ...

    • Review of the Gothenburg Protocol: Chemical and biological responses in surface waters and soils (ICP Waters report 89/2007) 

      Wright, R.; Posch, Maximilian; Cosby, B. Jack; Forsius, Martin; Skjelkvåle, B.L. (NIVA-rapport;5475, Research report, 2007-08)
      Monitoring data from ICP Waters and ICP Integrated Monitoring as well as other sources show clear and large regional recovery in surface water chemistry in response to the large decreases in deposition of sulphur and to a ...

    • Risk of N leaching from forests to surface waters in Norway 

      Wright, R. (NIVA-rapport;4038, Research report, 1999)
      Data from soil surveys, lake surveys and deposition measurements for 634 squares of a 12x12 km grid in forest areas of Norway show that leaching of NO3 from forested areas of Norway is strongly related to N deposition but ...

    • Soil Chemistry 1983-86 at the Rain Project Catchments 

      Lotse, E.G.; Wright, R. (NIVA-rapport;2293, Research report, 1989)
      The aim of the rain project is to explain the effects of changed acid deposition on soils and waters. This report presents results from chemical and physical analyses of soil samples collected yearly 1984-1986 at the rain ...

    • Soils in mountain and upland regions of southwestern Norway nitrogen leaching and critical loads 

      Wright, R.; Mulder, J.; Esser, Jacqueline M. (NIVA-rapport;4130, Research report, 1999)
      Soil data were collected from 36 points in mountain and upland areas of southwestern Norway. Samling was at cross-points on the NIJOS`9x9 km grid used for forest and soil monitoring. The soils were linked to water chemistry ...

    • Sulitjelma - effekter av luftforurensninger på innsjøer 

      Johannessen, M.; Wright, R. (NIVA-rapport;1238, Research report, 1980)
      I april 1980 ble det tatt snøprøver fra 16 lokaliteter og vannprøver fra 29 lokaliteter i et område innen 10 km avstand fra smelteverket ved Sulitjelma. Snøprøvene synes ikke å være nevneverdig påvirket av luftforurensninger ...