摘要：Runoff generation and fluxes of dissolved elements were studied in two drained peatlands under different land uses during spring snowmelt 2012. One site experienced soil frost, whereas the other site was frost-free due to groundwater seepage. Runoff water was sampled at 12-hour intervals during the snowmelt peak and soil and snow samples were taken. All samples were analysed for oxygen-18 isotope and various water quality parameters. The results demonstrated the effect of soil frost on water flow paths, which further affected runoff water quality. At the frost-free site, seepage through the peat soil profile was the main flow route during snowmelt runoff generation, which could be seen e.g., as high DOC concentration in the stream. At the site with soil frost, meltwater could not infiltrate into the soil, leading to overland flow and lower concentrations of elements in water during the peak snowmelt period.
