期刊
JOURNAL OF MAPS
卷 17, 期 2, 页码 18-29出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17445647.2020.1857856
关键词
Lakes; area changes; reclamation; the Osa River catchment; Poland
The study objective was to prepare a quantitative inventory of lakes and to assess their long-term changes. The research area included the Osa river basin (northern Poland), which is located in a lake district. The research was based on historical cartographic materials published in 1900-1947 (German 1:25,000 'Messtischblatt' topographic maps) and modern topographic maps from 2010 (The 1:50,000 Digital Map of the Hydrographic Division of Poland [MPHP]. The number of lakes increased from 173 to 235, while the total surface area of the lakes fell by 107.55 ha. The largest number of lakes belonged to the 1.0-5.0 ha range on both MPHP and Messtischblatt maps. It was in this range that the largest increase in number of lakes and lake area relative to the historical maps was found. A significant reduction in area of lakes was recorded in the group of lakes with an area from 50 to 100 ha.
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