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Modeling acidification and recover in the roofed catchment at Lake Gårdsjön

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Abstract

The dynamic, biogeochemical model SAFE was applied to a roofed subcatchment G1 at Gårdsjön, Sweden. The roof was installed in 1991, and deposition of anthropogenic S and N reduced by ca. 90%. Initiated from pre-industrial steady-state conditions, SAFE predicts present levels of biologically relevant chemical properties (pH, inorganic Al and base cations). SAFE overestimates the short-term effects of the manipulation on runoff pH, while the modeled decline in inorganic Al and and base cations are comparable to observations. Temporal variability and too few years of measured data make model to data comparison difficult. Sulfate desorption, which is not included in SAFE, may introduce a time lag between modeled and measured data. Reductions of S and N inputs by 90% will lead to a recovery in pH, low A1 but extremely low base cations concentrations due to replenishment of exchange sites.

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Authors and Affiliations

  1. Chemical Engineering II, Lund University, P.O. Box 124, S-221 00, Lund, Sweden

    Harald Sverdrup & Per Warfvinge

  2. Swedish Environmental Research Institute, P.O. Box 47086, S-402 58, Göteborg, Sweden

    Hans Hultberg & Filip Moldan

Authors
  1. Harald Sverdrup
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  2. Per Warfvinge
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  3. Hans Hultberg
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  4. Filip Moldan
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Sverdrup, H., Warfvinge, P., Hultberg, H. et al. Modeling acidification and recover in the roofed catchment at Lake Gårdsjön. Water Air Soil Pollut 85, 1753–1758 (1995). https://doi.org/10.1007/BF00477233

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  • DOI: https://doi.org/10.1007/BF00477233

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