Abstract
Windstorms belong to the most costly natural threats in Poland. On August 11-12, 2017, a strong thunderstorm happened which resulted in a catastrophic damage in three provinces: Wielkopolskie, Kujawsko-Pomorskie, and Pomorskie. This disaster has resulted in the death of 6 people, injuries to several dozen people, and enormous property losses including approximately 16,000 residential, utility and public buildings, 80,000 hectares of forest area, 67,000 hectares of agricultural crops, in excess of 300 overhead power line poles, and over 200 cables were downed. The trees felled by the wind blocked and partially damaged local and municipal roads over a length of about 1100 km. Over 500,000 consumers were deprived of electricity at the peak of the disaster. The purpose of this paper is to describe, analyse, and learn from such a dangerous extreme weather event. In order to achieve this, a cause of the thunderstorm, its important meteorological data, the severity of damage to buildings, civil infrastructure and environment, processes of damage surveys, ideas for reconstruction and removing of all damage, financial assistance from the central government, local authorities, and public collections were studied for better preparation of all services and people for mitigation of the effects of a natural disaster which may happen in the future. An example of a building with improved stiffness as the solution for better resistance of wind forces is presented.
Highlights
Damage to buildings, civil infrastructure, and the environment by different kind of wind storms have been a fact of life for a human being from the past to the present day
The disaster has caused the death of 6 people, injuries to several dozen people and enormous property losses including approximately 16,000 residential, utility, and public buildings, 80,000 hectares of forest area, 67,000 hectares of agricultural crops, in excess
The details are given below: a) the death of 6 people and 62 people were injured, b) damage to 16091 residential, farm, commercial, and public buildings, c) agricultural crops were destroyed in an area covering 66 717 hectares, d) forests were destroyed in an area of approximately 80 000 hectares, e) blocked and partially damaged commune, district and province roads over a length of about 1100 km, f) damage to 25 high-voltage lines, 300 overhead power line poles, and over 200 cables were downed
Summary
Civil infrastructure, and the environment by different kind of wind storms have been a fact of life for a human being from the past to the present day. On August 11-12, 2017, a mesoscale convection system containing the squall line was created on the border between the Czech Republic and Poland, passing through the Dolnośląskie, Opolskie, Wielkopolskie, Kujawsko-Pomorskie, and Pomorskie provinces. When the thunderstorm reached the border between the Dolnośląskie and Wielkopolskie, it grew stronger and caused catastrophic damage in three provinces: Wielkopolskie, Kujawsko-Pomorskie, and Pomorskie. The disaster has caused the death of 6 people, injuries to several dozen people and enormous property losses including approximately 16,000 residential, utility, and public buildings, 80,000 hectares of forest area, 67,000 hectares of agricultural crops, in excess. This paper present only first finished part of post-disaster investigation results. The second part on the 65 Scientific Conference in Krynica-Zdrój 15-20.09.2019 is going be presenting
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