Browsing NIVA-rapporter by Subject "vannkjemi"
Now showing items 21-40 of 257
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Critical load of acidity to surface waters in South-central Ontario Canada I. Application of the Steady State Water Chemistry (SSWC) model
(NIVA-rapport;4427, Research report, 2001)The Steady-State Water Chemistry Model was applied to lakes in 5 regions in Ontario, Canada. Critical loads and exceedances calculated for the regions indicate that the portion of the lakes with exceedances dropped from ... -
Critical Load of Acidity to Surface Waters in Southcentral Ontorario, Canada
(NIVA-rapport;4567, Research report, 2002)The First-order Acidity Balance (FAB) model was applied to 291 lakes in the Muskoka river catchment in Ontario, Canada. Critical loads and exceedances calculated for the region indicate that the portion of the lakes with ... -
Critical loads for soil in Norway, Nordmoen
(NIVA-rapport;2605, Research report, 1991)We evaluate the critical load for soil and water at Nordmoen using the dynamic model Magic, the static PROFILE model, and the empirical method as suggested by the mapping handbook. Nordmoen is located about 60 km N of Oslo ... -
Critical loads for soils in Norway. Analyses of soils data from eight Norwegian catchments
(NIVA-rapport;2484, Research report, 1990)Assessment of critical loads for soil at the catchment scale requires estimates of soil properties characteristic of the catchment. Soil data collected in routine soil surveys must thus be aggregated both spatially and ... -
Critical loads for soils in Norway. Preliminary assessment based on data from 9 calibrated catchments
(NIVA-rapport;2483, Research report, 1990)Critical load for acid deposition with respect to soils are calculated for 9 calibrated catchments in southern Norway. Two methods recommended by the UN-ECE Handbook on Mapping Critical Loads were used: The stratic empirical ... -
Critical loads for surface waters - chemical criteria for inputs of strong acids
(NIVA-rapport;2466, Research report, 1990)Chemical criteria have been established for the critical loads of strong acids to surface waters in Norway. A complete set of data is available for all the counties with the exception of North Trøndelag, Nordland, Troms ... -
Critical loads of a acidity to surface waters - Svalbard
(NIVA-rapport;2941, Research report, 1993)Water samples from 162 sites from Svalbard and Bjørnøya were analysed. A precipitation map for Svalbard was prepared. Coloured maps of critical loads and exceedance of critical loads were made for inputs of strong acids. ... -
Critical loads of acidity to lakes in the Polish Tatra Mountains. A study of the yearly variations in the precipitation and water chemistry
(NIVA-rapport;2981, Research report, 1994)As part of the Agreement on Environmental Cooperation between Norway and Poland critical loads of acidity and their exceedance to two lakes in the Polish Tatra Mountains have been calculated after an extensive programme ... -
Critical loads of acidity to lakes in the Polish Tatra Mountains. Final report
(NIVA-rapport;3579, Research report, 1996)Major chemical compounds in precipitation and runoff have been intensively followed in two Polish, Tatra Mountain lakes (Dlugi Staw and Zielony Staw) since January 1993, to assess the degree of impact of acid precipitation. ... -
Critical loads of acidity to surface waters: A case study from the Polish Tatra Mountains
(NIVA-rapport;2725, Research report, 1992)As part of the Agreement on Environmental Cooperation between Norway and Poland critical loads of acidity and their exceedance to lakes in the granitic area of the Polish Tatra Mountains have been estimated. Lake samples ... -
Development of an efficient water quality monitoring system for the Neris River
(NIVA-rapport;3978, Research report, 1998)The main project task has been further development of the current water monitoring system in Lithuania. Neris River catshment has been the pilot study area. The work have included laboratory and field work on water chemistry, ... -
E16. Tunnel Auland-Lærdal Forhåndsregistrering av vannkvalitet, bunndyr og fisk i Lærdalselva og Kuvella
(NIVA-rapport;3147, Research report, 1994)Kjemisk vannkvalitet i Kuvella og Lærdalselva og i brønner som mates fra Kuvella er undersøkt. Videre er det foretatt bunndyrundersøkelser og elfiske på bestemte stasjoner i Kuvella og Lærdalselva. Det er videre redegjort ... -
E16. Tunnel Aurland - Lærdal. Forhåndsregistrering av vannkvalitet, bunndyr og fisk i Lærdalselva og Kuvella. Del II. (E16. Tunnel Aurland-Lærdal. Preliminary registrations of water quality, benthic fauna and fish in Lærdalselva and Kuvella)
(NIVA-rapport;3398, Research report, 1996)Kjemiske analyser av vann fra Kuvella, Lærdalselva og fra drikkevannsbrønner som mates fra Kuvella ble utført i 1994 og fulgt opp i 1995. Undersøkelser av bunndyrsamfunn og laksefisk i de to elvene ble startet opp i 1994 ... -
Effect of clear-cutting of forest on the chemistry of a shallow groundwater aquifer in southern Norway
(NIVA-rapport;4226, Research report, 2000)Clear-cutting of forests have pronounced effects on chemistry of soils and runoff water. The major effects are increased water yield, changes in nutrient cycles and increased leakage of the nutrients nitrate and potassium ... -
Einafjorden. Undersøkelse av vannkvaliteten i 1989, sammenlignet med situasjonen i 1977
(NIVA-rapport;2423, Research report, 1990)Einafjorden hadde i 1989 akseptabel vannkvalitet og var lite forurenset av næringssalter og fekale indikatorbakterier. En viss indignasjon på økt næringssalttilførsler ble likevel registrert og innsjøen ligger for tiden ... -
Ekstreme aluminiumskonsentrasjoner og lav pH i Langedalstjønna i Lillesand kommune - årsak, virkninger og mulige tiltak
(NIVA-rapport;2793, Research report, 1992)Innenfor nedbørfeltet til Langedalstjønna ved E-18-senteret i Lillesand er det sprengt ut 200.000 m³ masse. Dette har forårsaket en ekstrem vannkvalitet i tjernet. Undersøkelsen omfatter kjemiske analyser fra vann og ... -
En biologisk undersøkelse av Ranaelvas nedre løp
(NIVA-rapport;0159, Research report, 1966) -
En kjemisk og bakteriologisk undersøkelse av vannkilder på Karmøy
(NIVA-rapport;0116, Research report, 1964) -
En kjemisk undersøkelse av regulerte og uregulerte innsjøer i Mandalselvas nedslagsfelt
(NIVA-rapport;0118, Research report, 1964) -
En undersøkelse av vannforsyning til Vossevangen
(NIVA-rapport;0053, Research report, 1962)