Snow break
As snow breakage, at sleet and ice cliff, is called tree damage (tree branch, stem and crown breakage) caused by high snow - or ice loads on the tree or buildings and equipment . Similar damage caused by hoarfrost is known as fragrance breakage .
Damage characteristics
Increasingly, there is snow breakage in the middle and high mountains, where a lot of wet and heavy snow falls. But also forests and forests in swale and boiler documents are disproportionately affected because there cause the lower wind speeds to the fact that quite a lot of snow on the trees accumulate can.
Snow breakage occurs more frequently in conifers because of their larger attack surface than in the deciduous trees that are bare in winter . In the case of technical infrastructure, overhead lines and the like are particularly at risk.
Oak broken under snow load ( Münsterländer Schneechaos 2005)
Railway contact line damaged by freezing rain ( storm in February 2014 )
Buckled English oak in the Kaiserwald (2018)
Road at risk of tree breakage (Ennstal, heavy snow 2019 )
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activities
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If there is a risk of a snow break, stretches are usually completely closed, as entire trees, mainly shallow roots , can be uprooted and large, heavy branches threaten to break off, which happens spontaneously even a long time after the actual weather event. If there is a risk of snow breakage, a forest must be closed as a preventive measure for forestry reasons .
The planting of snow-resistant tree species and regular maintenance, especially of the treetops, significantly reduces the risk of snow breakage.
literature
- Fritz Schwerdtfeger : The forest diseases. Textbook of forest pathology and forest protection . 4th, revised edition. Parey, Hamburg and Berlin 1981, ISBN 3-490-09116-7 .
