Abstract
The release of previously stored soil SO4 2− is tightly connected with the reversibility of soil and water acidification. Thus soil SO4 2− dynamics have to be included when predicting the reversibility of acidification. Our aim was to compare two modelling approaches: The model MAGIC (Cosby et al., 1985) describes SO4 2− dynamics with the Langmuir sorption isotherme. In the SO-MODEL (Prenzel, 1991) a precipitation/ dissolution of jurbanite is defined.
Even though it was possible to calibrate both models to lysimeter data of the Solling D1 site in 1 m depth, the prognosis for SO4 2− concentrations in the soil solution differed significantly. While MAGIC predicted the observed gradual decrease of SO4 2− concentration with decreasing deposition, the SO-MODEL calculated stable concentrations up to the year 2026 followed by a sudden drop. Because the prognosis established with the SO-MODEL is incompatible with observed field data, we concluded that the predicted SO4 2− dynamic of the SO-MODEL was unrealistic.
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Alewell, C., Manderscheid, B., Lükewille, A. et al. Describing soil SO4 2− dynamics in the solling roof project with two different modelling approaches. Water Air Soil Pollut 85, 1801–1806 (1995). https://doi.org/10.1007/BF00477241
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DOI: https://doi.org/10.1007/BF00477241