A preliminary model of long-term changes in stream acidity in southwestern Scotland
- 30 May 1986
- journal article
- Published by Elsevier BV in Journal of Hydrology
- Vol. 84 (3-4), 381-401
- https://doi.org/10.1016/0022-1694(86)90135-6
Abstract
A modelling study has been undertaken to investigate long-term changes in stream acidity in Dargall Lane, a sub-catchment of Loch Dee, in Galloway, southwestern Scotland. The model, which includes sea salt effects, is based on the assumption that surface water chemistry is determined by reactions taking place in the soils and rocks within a catchment. Stream chemistry data are used to calibrate the model and the model reproduces the declining pH levels of recent years as indicated by paleoecological analysis. Stream acidity trends are investigated assuming two scenarios for future deposition. Assuming deposition rates are maintained in the future at 1984 levels, the model indicates that stream pH is likely to continue to decline below presently measured values. A 50% reduction in deposition rates would likely result in an increase in the pH of the stream, although the pH will not return to estimated preacidification levels.Keywords
This publication has 22 references indexed in Scilit:
- Time scales of catchment acidification. A quantitative model for estimating freshwater acidificationEnvironmental Science & Technology, 1985
- Modeling the Effects of Acid Deposition: Estimation of Long‐Term Water Quality Responses in a Small Forested CatchmentWater Resources Research, 1985
- Lake acidification in Galloway: a palaeoecological test of competing hypothesesNature, 1985
- Modeling the Effects of Acid Deposition: Assessment of a Lumped Parameter Model of Soil Water and Streamwater ChemistryWater Resources Research, 1985
- Modelling stream water chemistry with snowmeltPhilosophical Transactions of the Royal Society of London. B, Biological Sciences, 1984
- Diatom evidence for recent acidification of two Scottish lochsNature, 1983
- A model for streamwater chemistry at Birkenes, NorwayWater Resources Research, 1982
- A physically based, variable contributing area model of basin hydrology / Un modèle à base physique de zone d'appel variable de l'hydrologie du bassin versantHydrological Sciences Bulletin, 1979
- SULFATE SORPTION BY TWO OXISOLS AND AN ALFISOL OF THE TROPICS1Soil Science, 1979
- Acidification of the La Cloche Mountain Lakes, Ontario, and Resulting Fish MortalitiesJournal of the Fisheries Research Board of Canada, 1972