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Tålegrenser for forsuring og overskridelser for seks vassdrag i Vestland fylke

Authors: Austnes, Kari; Sample, James Edward; Lund, Espen;

Tålegrenser for forsuring og overskridelser for seks vassdrag i Vestland fylke

Abstract

Det har blitt beregnet tålegrenser for forsuring og overskridelse av disse for Samnanger-, Uskedals-, Eksingedals-, Modals-, Yndesdals- og Flekke- og Guddalsvassdraget. Overskridelser er beregnet for dagens (2012-2016) og framtidig (2030) avsetning av svovel og nitrogen. For 2012-2016 var det overskridelser av tålegrensene i mange delnedbørfelt og i ett eller fire vassdrag som helhet, avhengig av hvilken tålegrensemodell som ble benyttet. Med redusert avsetning i 2030 var overskridelsene lavere, og færre områder var overskredet. Det var størst overskridelse i Yndesdalsvassdraget, mens det ikke var overskridelse i Uskedalsvassdraget. Det er viktig å merke seg at på grunn av forsinkelser i systemene kan det være forsuring selv om tålegrensene ikke er overskredet. Men så lenge det ikke er overskridelse vil forsuringen gradvis avta, og de sure episodene vil bli mindre hyppige og alvorlige. Forbedringen fram mot 2030 forutsetter at landene overholder internasjonale forpliktelser med hensyn til utslippsreduksjoner.

Prosjektleder Kari Austnes

Country
Norway
Related Organizations
Keywords

Rivers, Overskridelser, Sur nedbør, Acid Rain, Critical loads, Tålegrenser, VDP::Matematikk og naturvitenskap: 400, Elver, Exceedances, VDP::Mathematics and natural scienses: 400

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green