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Leo Heikurainen (email)

The effect of thinning, clear cutting, and fertilization on the hydrology of peatland drained for forestry

Heikurainen L. (1970). The effect of thinning, clear cutting, and fertilization on the hydrology of peatland drained for forestry. Acta Forestalia Fennica no. 104 article id 7538. https://doi.org/10.14214/aff.7538

Abstract

The aim of this study was to assess the effect of cutting of different intensities on the hydrology of drained peatland. The study concerned with measuring changes in the ground water level, throughfall, and snow cover, and specially runoff. This study focused on the phenomena that occur during the growing season. Seven sample plots were measured in an area in Central Finland which had been drained about 50 years earlier and had Scots pine (Pinus sylvestris L.) stand of uniform age.

To survey the hydrological effects of cuttings, 20%, 40% and 60% of the stand volume was removed in thinnings. In addition, one sample plot was clear-cut. During the first two years after cutting the interception diminished, and throughfall increased by 7% for the 20% thinning, by 8% for the 40% thinning and by 12% for the 60% thinning. Clear cutting increased the throughfall by 29%. The thinnings increased the depth of the snow cover the more the heavier the thinning.

Even the lightest thinning raised the ground water table, but the difference between 20% and 40% thinning was not marked. Cuttings increased runoff the greater the heavier the cutting. The hydrological changes of fellings were detrimental for the site. However, there was a marked change only between the 40% and 60% thinnings. Fertilization had a favourable effect on the hydrology of the peatland by increasing the depth of ground water table, and decreasing the throughfall.

The PDF includes a summary in Finnish.

Keywords
fertilization; thinning; drained peatlands; throughfall; clear-cutting; hydrology; ground water table; snow cover; runoff

Published in 1970

Views 3403

Available at https://doi.org/10.14214/aff.7538 | Download PDF

Creative Commons License CC BY-SA 4.0

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