Modelling geochemistry and Lake pH since glaciation at Lake Gårdsjön

Per Warfvinge, Harald Sverdrup, Mattias Alveteg, Fredrik Rietz

Research output: Contribution to journalArticlepeer-review

Abstract

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.
Original languageEnglish
Pages (from-to)713-718
JournalWater, Air and Soil Pollution
Volume85
Issue number2
DOIs
Publication statusPublished - 1995

Subject classification (UKÄ)

  • Chemical Engineering

Keywords

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

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