Predicted changes in streamwater chemistry following reduced/increased sulphur deposition using the “Birkenes model” |
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| Authors: | H M Seip N Christophersen S Rustad |
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| Institution: | 1. Center for Industrial Research, Box 350, 0314, Blindern, OSLO 3, Norway
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| Abstract: | A sensitivity analysis of some important parameters in a mathematical model previously found to reproduce major short-term variations in water chemistry in some streams, has been carried out. The results are also relevant in a discussion of possible changes in stream acidity for changes in S deposition. In the simulations sulphate concentrations in streamwater were doubled or halved compared to present day values. Assuming no change in the lime potential of the soil, the peak acidity during snowmelt changed with up to 0.9 pH units; shifts from 0.4 to 0.5 units occurred in many cases. By simultaneously changing the sulphate stream concentration and the lime potential with 0.2 units shifts of about 1 pH unit were obtained in the simulations for some acidity peaks. |
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