Abstract
Freeze-thaw cycles which can occur in soils during winter and early spring snow melt have a significant effect upon the chemical composition of stream water. The observed trends in solute composition in river water during snow melt have been related to the leachate composition from columns of organic soil which have been temporarily frozen prior to leaching in the laboratory. Substantial amounts of many of the elements which dominate river water chemistry become available to leaching upon thawing the soil. Aluminium, potassium and organic carbon in particular are mobilized as thaw occurs. Soil freezing may also influence water solute chemistry by modifying hydrological pathways.
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