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Modelling geochemistry and Lake pH since glaciation at Lake Gårdsjön

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Author

Summary, in English

The soil acidification model SAFE was modified to calculate historical changes in geochemistry and runoff since the last glaciation ended at the Lake Gårdsjön F1 catchment 12 000 B.P. Changes in runoff pH and ANC, soil weathering rate, soil mineralogy, soil texture and base saturation was also calculated. The changes in mineralogy compared favorable to data. Modeled historic weathering rates were slightly higher than data suggest, while present weathering rate was somewhat to low, 37 mmolc m–2 yr–1. The weathering rate was very high immediately after the last glaciation, and decreased as the smaller particles were consumed by weathering. The calculated runoff pH follows the pattern of the paleo-inferred pH. SAFE suggests a natural depletion of base cations in the C-layer.

Publishing year

1995

Language

English

Pages

713-718

Publication/Series

Water, Air and Soil Pollution

Volume

85

Issue

2

Document type

Journal article

Publisher

Springer

Topic

  • Chemical Engineering

Keywords

  • Weathering - mineral - soil - acidification - geochemistry - surface water

Status

Published

ISBN/ISSN/Other

  • ISSN: 1573-2932