Hydrology and Earth System Sciences www.hydrol-earth-syst-sci.net 1027-5606 1607-7938 12 2 2008 10.5194/hess-12-479-2008 http://www.hydrol-earth-syst-sci.net/12/479/2008/ http://www.hydrol-earth-syst-sci.net/12/479/2008/hess-12-479-2008.html http://www.hydrol-earth-syst-sci.net/12/479/2008/hess-12-479-2008.pdf 479 490 2008-03-05 Predicting long-term recovery of a strongly acidified stream using MAGIC and climate models (Litavka, Czech Republic) D. W. Hardekopf davidh@natur.cuni.cz J. Horecký J. Kopáček E. Stuchlík Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Benátská 2, 12801, Prague 2, Czech Republic Hydrobiological Institute, Academy of Sciences of the Czech Republic, and Faculty of Biological Sciences, University of South Bohemia, Na Sádkách 7, 37005, České Budějovice, Czech Republic Two branches forming the headwaters of a stream in the Czech Republic were studied. Both streams have similar catchment characteristics and historical deposition; however one is rain-fed and strongly affected by acid atmospheric deposition, the other spring-fed and only moderately acidified. The MAGIC model was used to reconstruct past stream water and soil chemistry of the rain-fed branch, and predict future recovery up to 2050 under current proposed emissions levels. A future increase in air temperature calculated by a regional climate model was then used to derive climate-related scenarios to test possible factors affecting chemical recovery up to 2100. Macroinvertebrates were sampled from both branches, and differences in stream chemistry were reflected in the community structures. 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