Blar i NIVA-rapporter på emneord "critical"
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Acidification and Atlantic salmon critical limits for Norwegian rivers
(NIVA-rapport;4501, Research report, 2002)An analysis of water chemistry and salmon population status based on data for 1993-94 shows that of 73 salmon rivers in Norway, 23 have extinct populations and an additional 22 have affected populations. Acidification is ... -
Assessment of the Applicability for Pollution Control Authorities of the Concept "Critical loads" of Long range Transported Micropollutants in Relation to Aquatic and Terrestrial Ecosystems
(NIVA-rapport;3751, Research report, 1997)The applicability for pollution management and control authorities of consept "Critical load" of long-range transported micropollutants has been evaluated for sensitive parts of aquatic and terrestrial ecosystems. The ... -
Atmospheric deposition of nitrogen, runoff of organic nitrogen, and critical loads for soils and waters
(NIVA-rapport;3592, Research report, 1997)Here we test the hypothesis that increased deposition of inorganic N compounds leads to increased leachingand runoff of organic N and thus a higher critical load. We use mainly Norwegian data from input-output fluxes at ... -
Bruk av dynamiske modeller for vurdering av vann- og jordforsuring som følge av redusert tilførsel av sur nedbør
(NIVA-rapport;3148, Research report, 1995)Som følge av den nye svovel-protokollen vil tilførselen av sur nedbør til Norge avta i årene fremover. Den nye tilførselmønsteret vil endre omfang og utbredelse av forsuringsskader i Norge. Dynamiske modeller som beskriver ... -
Critical load exceedance and damage to fish populations
(NIVA-rapport;2900, Research report, 1993)To examine the relationship between the critical load exceedance and the damage to fish, the data for fish damage and water chemistry for 1000 lakes in Norway was used to derive the probability of damage to fish populations ... -
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 and their exceedances for ICP-Waters sites (ICP Waters report 44/1998)
(NIVA-rapport;3821, Research report, 1998-03)The International Co-operative Programme on Assessment and Monitoring of Acidification of Rivers and Lakes (ICP Waters) is designed to assess, on a regional basis, the degree and geographical extent of acidification of ... -
Critical loads for lead (Pb) and cadmium (Cd) in surface waters in Norway - evaluation of methodology and preliminary maps
(NIVA-rapport;4808, Research report, 2004)Critical loads for lead (Pb) and cadmium (Cd) are calculated for Norwegian surface waters based on currently available methodology from the UNECE ICP Mapping and Modelling program. Two different values are used for critical ... -
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 and application of the FAB model to calculate critical loads of S and N for lakes in the Killarney Provincial Park (Ontario, Canada)
(NIVA-rapport;4202, Research report, 2000)In Sudbury, Canada, large reductions in sulfur emissions have resulted in reduced critical load exceedances and partial recovery of many lakes in the Killarney Provincial Park. The First-order Acidity Balance (FAB) model ... -
Dynamic modelling of soil water acidification: display and presentation of results for policy purposes
(NIVA-rapport;4733, Research report, 2003)Dynamic models for soil and water acidification and recovery are becoming increasingly important tools in determining policy for future emissions of air pollutants in Europe. Dynamic models represent the next step in ... -
Effekter av utslipp fra aluminiumsindustri i det marine miljø
(NIVA-rapport;3103, Research report, 1994)Basert på litteraturdata er det gjort en kort sammenstilling av det som er kjent om økologiske effekter av PAH (polysykliske aromatiske hydrokarboner) i det marine miljø mer summarisk for fluorid, forsuring og cyanid. Det ... -
Exceedance of critical loads for lakes in Finland, Norway and Sweden: Reduction requirements for nitrogen and sulfur deposition
(NIVA-rapport;2841, Research report, 1993)The main goal of the present study was to evaluate the different ways of computing the exceedances and the reductions needed for N and S depositions. Two models for calculating the steady state critical loads for N and S ...