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Juhani Päivänen

Sateen jakaantuminen erilaisissa metsiköissä.

Päivänen J. (1966). Sateen jakaantuminen erilaisissa metsiköissä. Silva Fennica no. 119 article id 4732. https://doi.org/10.14214/sf.a14290

English title: Distribution of rainfall in different types of forest stands.


Stand precipitation and stemflow studies became necessary in connection with hydrologic studies, for instance, to explain the deviations resulting from rains in the ratios between the water content of peat and the groundwater level, throughfall during rains of variable heaviness, and effect of stand treatment on soil moisture level. In this project the distribution of rainfall in stands differing in species composition and density was studied in Central Finland in 1963–1965 in fifteen stand precipitation sample plots. In addition, rain gauges were situated under individual Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) H. Karst.) and birch (Betula sp.) trees.

The average precipitation in the open was 4.8 mm, the corresponding precipitation in the stand was 77% for birch, 71% for pine and 62% for spruce. Measurements of stemflow from individual sample trees showed that less than ¼ mm (about 1.5%) during a 15 mm rain in a pine stand. In the spruce stands stemflow is negligible. A part of the sample plots was in drained peatlands with a dense vegetation of small shrubs. The shrub layer retention was about 10% even during heavy rain. In a small forest clearing, the bordering effect of the forest was seen up to the distance of 5 metres from the edge of the forest. During the period of study, on an average 3% more precipitation was recorded in the clearing than in the open, the difference being probably due to the stronger wind effect in the open.

The PDF includes a summary in English.

Original keywords
sadanta; metsikkösadanta; runkovalunta; puulajit; koivu; kuusi; mänty

English keywords
precipitation; throughfall; stem flow; tree species; birch; Betula; Norway spruce; Picea abies; Scots pine; Pinus sylvestris

Published in 1966

Available at https://doi.org/10.14214/sf.a14290 | Download PDF

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