Water Chemistry and Acidification Recovery in Rogaland County
INNSENDTE ARTIKLER Water chemistry and acidification recovery in Rogaland County By Espen Enge Espen Enge is senior engineer, Environmental Division, County Governor of Rogaland. Sammendrag Introduction Redusert forsuring av fjellvann i Rogaland Due to exceptionally slow weathering bedrock, fylke. Her bearbeides resultater fra i alt 1144 the concentrations of ions in river and lake water prøver fra 2002, 2007 og 2012. Tre ulike forsurings in the mountain areas of southern Norway are modeller antydet at forsuringen i fjellområdene i generally very low (Wright and Henriksen 1978). Rogaland (>500 m) i dag er begrenset, og at In Rogaland, 12% of the surveyed lakes in 1974 vannkvaliteten trolig er nær en opprinnelig ufor 1979 (Sevaldrud and Muniz 1980) had conduc suret vannkvalitet. Mange lavereliggende inn tivity of <10 µS/cm, and the minimum value was sjøer var tilsynelatende fortsatt forsuret, men 4.2 µS/cm. disse estimatene kan være forbundet med usik Dilute, weakly buffered water is highly sensi kerhet. Ioneinnholdet i vannet i fjellområdene er tive to acidification. Thus, as early as the 1870s ekstremt lavt, noe som i seg selv trolig utgjør en the brown trout population (Salmo trutta) in begrensning for utbredelsen av aure. Sandvatn in Hunnedalsheiene declined close to extinction (HuitfeldtKaas 1922), possibly due to Summary emerging acidification (Qvenild et al. 2007). In The current study compiles data from 1144 water the 1920s massive fish kills due to acidic water samples from three large regional water chemical were observed in the salmon rivers Dirdal, Fra surveys, performed in 2002, 2007 and 2012. fjord and Espedal (HuitfeldtKaas 1922).
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