Blar i NIVA-rapporter på emneord "acid precipitation"
Viser treff 1-20 av 93
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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 ... -
Changes in the chemistry of Lake Hovvatn, Norway, following liming and reacidification
(NIVA-rapport;1657, Research report, 1984)Hovvatn, a 1 km², chronically-acidified lake in southernmost Norway, was treated with 200 metric tons of powdered limestone in March 1981. An additional 40 metric tons were spread uniformly on the ice of a 0.045 km² pond ... -
CLIMEX Climate Change Experiment: Final report on Phase I the first year of treatment May 1994 - Desember 1994
(NIVA-rapport;3392, Research report, 1995)Catchment ecosystems are expected to show a cascade of responses to increased CO2 and temperature. The first expected step was observed in the first year of treatment increased CO2 changed rates of photosynthesis and ... -
CLIMEX Climate Change Experiment: Progress report December 1992 - June 1993
(NIVA-rapport;3389, Research report, 1995)This report describes the technical installations at Risdalsheia and the establishment at permanent plots for scientific studies of vegetation and soils at the 5 experimental catchments. -
CLIMEX Climate Change Experiment: Progress report July 1993 - December 1993
(NIVA-rapport;3390, Research report, 1995)This report describes data obtained during the pre-treatment period at the Risdalsheia site. Results from laboratory experiments with plants and soils are also reported. -
CLIMEX Project: Climate data for first year of treatment April 1994 - March 1995
(NIVA-rapport;3339, Research report, 1995)Climate change treatment began in April 1994 at the 2 experimental catchments. At KIM CO2 is increased (to 560 ppm) and air is heated (by 3¨ C in summer and 5¨ C in winter). At EGIL soil is heated. Except for an initial ... -
Climex project: Data report for June 1994 - May 1999
(NIVA-rapport;4157, Research report, 1999)CLIMEX project was conducted from May 1994 to June 1998 and involved whole ecosystem manipulation of temperature and CO2 at the catchment scale. Measurements of precipitation and runoff continued for one-year post-treatment ... -
CLIMEX project: Report on the second year of treatment May 1995 - December 1995
(NIVA-rapport;3526, Research report, 1996)CLIMEX is a integrated, whole-ecosystem research project studying the response of entire forested catchments to increased CO2 and temperature. These whole-catchment manipulation experiments are designed to allow quantification ... -
Climex project: Report on the third year of treatment, May 1996 - December 1996
(NIVA-rapport;3745, Research report, 1997)CLIMEX is an integrated, whole-ecosystem research project studying the response of entire forested catchments to increased CO2 and temperature. These whole-catchment manipulation experiments are designed to allow quantification ... -
CLIMEX project: Response of runoff chemistry after 2 years of elevated CO2 and temperature
(NIVA-rapport;3542, Research report, 1996)CLIMEX is an integrated, whole-ecosystem research project studying the response of entire forested catchments to increased CO2 and temperature. KIM catchment receives clean rain, elevated CO2 and elevated air temperature. ... -
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 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 ... -
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 ... -
Er laksen truet selv ved moderat forsuring? Eksempler fra Vosso, Hordaland, 1993
(NIVA-rapport;2947, Research report, 1993)Forsøk med eksponering av laksesmolt på et antall stasjoner i Vossovassdraget påviste tildels omfattende vannkvalitetsproblemer. Med unntak av en stasjon (Strandaelva), ble det påvist enten dødelighet, eller tap av klorid ... -
Forsuring av grunnvann
(NIVA-rapport;1347, Research report, 1981)Det er opprettet en stasjon for overvåking av eventuell forsuringsutvikling i grunnvann i løsavsetninger i eller nær hvert av de feltforskningsområder som inngår i det statlige programmet for overvåking av langtransportert ... -
Forsuring av overflatevann - beregningsmetodikk, trender og mottiltak. (Acidification of surface waters - methods, trends and countermeasures)
(NIVA-rapport;3528, Research report, 1996)Begrepet "naturens tålegrenser" (eng. critical load) er idag akseptert som utgangspunkt for politiske beslutninger om reduksjoner i utslipp av svovel og nitrogen. Det tallmaterialet som framskaffes gir grunnlag for og ... -
Forsuringssituasjonen i Fyresvatn og Nisser 1982-83
(NIVA-rapport;1649, Research report, 1984)De pH-variasjoner som bekker og elver i nedbørfeltene til Fyresvatn og Nisser viser gjennom året jevnes ut i innsjøene hvor pH er mellom 5,1 og 5,6. Størst pH-variasjon gjennom året viser overflatelaget i Fyresvatn med 0,4 ... -
Hekni kraftverk i Otra, Aust-Agder. Vurdering av kalkingstiltak på berørt utbyggingsstrekning
(NIVA-rapport;3330, Research report, 1995)I forbindelse med etableringen av Henki kraftverk i Otra er det utredet kalkingstiltak for å hindre ytterligere forsuring av utbyggingsstrekningen for dermed å redusere faren for skade på fiskebestanden i Otra. Ved dagens ...